769 lines
22 KiB
PHP
769 lines
22 KiB
PHP
<?php
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/**
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* This file is part of the Nette Framework (https://nette.org)
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* Copyright (c) 2004 David Grudl (https://davidgrudl.com)
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*/
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declare(strict_types=1);
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namespace Nette\Utils;
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use Nette;
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/**
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* Basic manipulation with images. Supported types are JPEG, PNG, GIF, WEBP, AVIF and BMP.
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*
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* <code>
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* $image = Image::fromFile('nette.jpg');
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* $image->resize(150, 100);
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* $image->sharpen();
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* $image->send();
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* </code>
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*
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* @method Image affine(array $affine, array $clip = null)
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* @method array affineMatrixConcat(array $m1, array $m2)
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* @method array affineMatrixGet(int $type, mixed $options = null)
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* @method void alphaBlending(bool $on)
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* @method void antialias(bool $on)
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* @method void arc($x, $y, $w, $h, $start, $end, $color)
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* @method void char(int $font, $x, $y, string $char, $color)
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* @method void charUp(int $font, $x, $y, string $char, $color)
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* @method int colorAllocate($red, $green, $blue)
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* @method int colorAllocateAlpha($red, $green, $blue, $alpha)
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* @method int colorAt($x, $y)
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* @method int colorClosest($red, $green, $blue)
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* @method int colorClosestAlpha($red, $green, $blue, $alpha)
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* @method int colorClosestHWB($red, $green, $blue)
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* @method void colorDeallocate($color)
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* @method int colorExact($red, $green, $blue)
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* @method int colorExactAlpha($red, $green, $blue, $alpha)
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* @method void colorMatch(Image $image2)
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* @method int colorResolve($red, $green, $blue)
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* @method int colorResolveAlpha($red, $green, $blue, $alpha)
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* @method void colorSet($index, $red, $green, $blue)
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* @method array colorsForIndex($index)
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* @method int colorsTotal()
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* @method int colorTransparent($color = null)
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* @method void convolution(array $matrix, float $div, float $offset)
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* @method void copy(Image $src, $dstX, $dstY, $srcX, $srcY, $srcW, $srcH)
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* @method void copyMerge(Image $src, $dstX, $dstY, $srcX, $srcY, $srcW, $srcH, $opacity)
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* @method void copyMergeGray(Image $src, $dstX, $dstY, $srcX, $srcY, $srcW, $srcH, $opacity)
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* @method void copyResampled(Image $src, $dstX, $dstY, $srcX, $srcY, $dstW, $dstH, $srcW, $srcH)
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* @method void copyResized(Image $src, $dstX, $dstY, $srcX, $srcY, $dstW, $dstH, $srcW, $srcH)
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* @method Image cropAuto(int $mode = -1, float $threshold = .5, int $color = -1)
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* @method void ellipse($cx, $cy, $w, $h, $color)
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* @method void fill($x, $y, $color)
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* @method void filledArc($cx, $cy, $w, $h, $s, $e, $color, $style)
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* @method void filledEllipse($cx, $cy, $w, $h, $color)
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* @method void filledPolygon(array $points, $numPoints, $color)
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* @method void filledRectangle($x1, $y1, $x2, $y2, $color)
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* @method void fillToBorder($x, $y, $border, $color)
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* @method void filter($filtertype)
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* @method void flip(int $mode)
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* @method array ftText($size, $angle, $x, $y, $col, string $fontFile, string $text, array $extrainfo = null)
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* @method void gammaCorrect(float $inputgamma, float $outputgamma)
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* @method array getClip()
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* @method int interlace($interlace = null)
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* @method bool isTrueColor()
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* @method void layerEffect($effect)
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* @method void line($x1, $y1, $x2, $y2, $color)
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* @method void openPolygon(array $points, int $num_points, int $color)
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* @method void paletteCopy(Image $source)
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* @method void paletteToTrueColor()
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* @method void polygon(array $points, $numPoints, $color)
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* @method array psText(string $text, $font, $size, $color, $backgroundColor, $x, $y, $space = null, $tightness = null, float $angle = null, $antialiasSteps = null)
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* @method void rectangle($x1, $y1, $x2, $y2, $col)
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* @method mixed resolution(int $res_x = null, int $res_y = null)
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* @method Image rotate(float $angle, $backgroundColor)
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* @method void saveAlpha(bool $saveflag)
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* @method Image scale(int $newWidth, int $newHeight = -1, int $mode = IMG_BILINEAR_FIXED)
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* @method void setBrush(Image $brush)
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* @method void setClip(int $x1, int $y1, int $x2, int $y2)
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* @method void setInterpolation(int $method = IMG_BILINEAR_FIXED)
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* @method void setPixel($x, $y, $color)
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* @method void setStyle(array $style)
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* @method void setThickness($thickness)
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* @method void setTile(Image $tile)
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* @method void string($font, $x, $y, string $s, $col)
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* @method void stringUp($font, $x, $y, string $s, $col)
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* @method void trueColorToPalette(bool $dither, $ncolors)
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* @method array ttfText($size, $angle, $x, $y, $color, string $fontfile, string $text)
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* @property-read int $width
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* @property-read int $height
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* @property-read resource|\GdImage $imageResource
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*/
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class Image
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{
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use Nette\SmartObject;
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/** {@link resize()} only shrinks images */
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public const SHRINK_ONLY = 0b0001;
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/** {@link resize()} will ignore aspect ratio */
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public const STRETCH = 0b0010;
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/** {@link resize()} fits in given area so its dimensions are less than or equal to the required dimensions */
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public const FIT = 0b0000;
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/** {@link resize()} fills given area so its dimensions are greater than or equal to the required dimensions */
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public const FILL = 0b0100;
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/** {@link resize()} fills given area exactly */
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public const EXACT = 0b1000;
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/** image types */
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public const
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JPEG = IMAGETYPE_JPEG,
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PNG = IMAGETYPE_PNG,
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GIF = IMAGETYPE_GIF,
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WEBP = IMAGETYPE_WEBP,
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AVIF = 19, // IMAGETYPE_AVIF,
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BMP = IMAGETYPE_BMP;
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public const EMPTY_GIF = "GIF89a\x01\x00\x01\x00\x80\x00\x00\x00\x00\x00\x00\x00\x00!\xf9\x04\x01\x00\x00\x00\x00,\x00\x00\x00\x00\x01\x00\x01\x00\x00\x02\x02D\x01\x00;";
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private const Formats = [self::JPEG => 'jpeg', self::PNG => 'png', self::GIF => 'gif', self::WEBP => 'webp', self::AVIF => 'avif', self::BMP => 'bmp'];
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/** @var resource|\GdImage */
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private $image;
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/**
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* Returns RGB color (0..255) and transparency (0..127).
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*/
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public static function rgb(int $red, int $green, int $blue, int $transparency = 0): array
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{
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return [
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'red' => max(0, min(255, $red)),
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'green' => max(0, min(255, $green)),
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'blue' => max(0, min(255, $blue)),
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'alpha' => max(0, min(127, $transparency)),
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];
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}
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/**
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* Reads an image from a file and returns its type in $type.
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* @throws Nette\NotSupportedException if gd extension is not loaded
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* @throws UnknownImageFileException if file not found or file type is not known
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* @return static
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*/
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public static function fromFile(string $file, ?int &$type = null)
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{
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if (!extension_loaded('gd')) {
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throw new Nette\NotSupportedException('PHP extension GD is not loaded.');
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}
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$type = self::detectTypeFromFile($file);
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if (!$type) {
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throw new UnknownImageFileException(is_file($file) ? "Unknown type of file '$file'." : "File '$file' not found.");
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}
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return self::invokeSafe('imagecreatefrom' . self::Formats[$type], $file, "Unable to open file '$file'.", __METHOD__);
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}
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/**
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* Reads an image from a string and returns its type in $type.
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* @return static
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* @throws Nette\NotSupportedException if gd extension is not loaded
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* @throws ImageException
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*/
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public static function fromString(string $s, ?int &$type = null)
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{
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if (!extension_loaded('gd')) {
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throw new Nette\NotSupportedException('PHP extension GD is not loaded.');
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}
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$type = self::detectTypeFromString($s);
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if (!$type) {
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throw new UnknownImageFileException('Unknown type of image.');
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}
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return self::invokeSafe('imagecreatefromstring', $s, 'Unable to open image from string.', __METHOD__);
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}
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private static function invokeSafe(string $func, string $arg, string $message, string $callee): self
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{
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$errors = [];
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$res = Callback::invokeSafe($func, [$arg], function (string $message) use (&$errors): void {
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$errors[] = $message;
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});
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if (!$res) {
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throw new ImageException($message . ' Errors: ' . implode(', ', $errors));
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} elseif ($errors) {
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trigger_error($callee . '(): ' . implode(', ', $errors), E_USER_WARNING);
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}
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return new static($res);
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}
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/**
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* Creates a new true color image of the given dimensions. The default color is black.
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* @return static
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* @throws Nette\NotSupportedException if gd extension is not loaded
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*/
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public static function fromBlank(int $width, int $height, ?array $color = null)
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{
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if (!extension_loaded('gd')) {
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throw new Nette\NotSupportedException('PHP extension GD is not loaded.');
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}
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if ($width < 1 || $height < 1) {
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throw new Nette\InvalidArgumentException('Image width and height must be greater than zero.');
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}
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$image = imagecreatetruecolor($width, $height);
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if ($color) {
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$color += ['alpha' => 0];
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$color = imagecolorresolvealpha($image, $color['red'], $color['green'], $color['blue'], $color['alpha']);
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imagealphablending($image, false);
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imagefilledrectangle($image, 0, 0, $width - 1, $height - 1, $color);
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imagealphablending($image, true);
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}
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return new static($image);
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}
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/**
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* Returns the type of image from file.
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*/
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public static function detectTypeFromFile(string $file, &$width = null, &$height = null): ?int
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{
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[$width, $height, $type] = @getimagesize($file); // @ - files smaller than 12 bytes causes read error
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return isset(self::Formats[$type]) ? $type : null;
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}
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/**
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* Returns the type of image from string.
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*/
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public static function detectTypeFromString(string $s, &$width = null, &$height = null): ?int
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{
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[$width, $height, $type] = @getimagesizefromstring($s); // @ - strings smaller than 12 bytes causes read error
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return isset(self::Formats[$type]) ? $type : null;
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}
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/**
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* Returns the file extension for the given `Image::XXX` constant.
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*/
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public static function typeToExtension(int $type): string
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{
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if (!isset(self::Formats[$type])) {
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throw new Nette\InvalidArgumentException("Unsupported image type '$type'.");
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}
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return self::Formats[$type];
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}
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/**
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* Returns the `Image::XXX` constant for given file extension.
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*/
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public static function extensionToType(string $extension): int
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{
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$extensions = array_flip(self::Formats) + ['jpg' => self::JPEG];
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$extension = strtolower($extension);
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if (!isset($extensions[$extension])) {
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throw new Nette\InvalidArgumentException("Unsupported file extension '$extension'.");
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}
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return $extensions[$extension];
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}
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/**
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* Returns the mime type for the given `Image::XXX` constant.
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*/
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public static function typeToMimeType(int $type): string
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{
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return 'image/' . self::typeToExtension($type);
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}
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/**
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* Wraps GD image.
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* @param resource|\GdImage $image
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*/
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public function __construct($image)
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{
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$this->setImageResource($image);
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imagesavealpha($image, true);
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}
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/**
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* Returns image width.
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*/
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public function getWidth(): int
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{
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return imagesx($this->image);
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}
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/**
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* Returns image height.
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*/
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public function getHeight(): int
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{
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return imagesy($this->image);
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}
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/**
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* Sets image resource.
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* @param resource|\GdImage $image
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* @return static
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*/
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protected function setImageResource($image)
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{
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if (!$image instanceof \GdImage && !(is_resource($image) && get_resource_type($image) === 'gd')) {
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throw new Nette\InvalidArgumentException('Image is not valid.');
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}
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$this->image = $image;
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return $this;
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}
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/**
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* Returns image GD resource.
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* @return resource|\GdImage
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*/
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public function getImageResource()
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{
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return $this->image;
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}
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/**
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* Scales an image.
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* @param int|string|null $width in pixels or percent
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* @param int|string|null $height in pixels or percent
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* @return static
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*/
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public function resize($width, $height, int $flags = self::FIT)
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{
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if ($flags & self::EXACT) {
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return $this->resize($width, $height, self::FILL)->crop('50%', '50%', $width, $height);
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}
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[$newWidth, $newHeight] = static::calculateSize($this->getWidth(), $this->getHeight(), $width, $height, $flags);
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if ($newWidth !== $this->getWidth() || $newHeight !== $this->getHeight()) { // resize
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$newImage = static::fromBlank($newWidth, $newHeight, self::rgb(0, 0, 0, 127))->getImageResource();
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imagecopyresampled(
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$newImage,
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$this->image,
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0,
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0,
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0,
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0,
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$newWidth,
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$newHeight,
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$this->getWidth(),
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$this->getHeight()
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);
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$this->image = $newImage;
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}
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if ($width < 0 || $height < 0) {
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imageflip($this->image, $width < 0 ? ($height < 0 ? IMG_FLIP_BOTH : IMG_FLIP_HORIZONTAL) : IMG_FLIP_VERTICAL);
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}
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return $this;
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}
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/**
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* Calculates dimensions of resized image.
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* @param int|string|null $newWidth in pixels or percent
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* @param int|string|null $newHeight in pixels or percent
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*/
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public static function calculateSize(
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int $srcWidth,
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int $srcHeight,
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$newWidth,
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$newHeight,
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int $flags = self::FIT
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): array
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{
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if ($newWidth === null) {
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} elseif (self::isPercent($newWidth)) {
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$newWidth = (int) round($srcWidth / 100 * abs($newWidth));
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$percents = true;
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} else {
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$newWidth = abs($newWidth);
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}
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if ($newHeight === null) {
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} elseif (self::isPercent($newHeight)) {
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$newHeight = (int) round($srcHeight / 100 * abs($newHeight));
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$flags |= empty($percents) ? 0 : self::STRETCH;
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} else {
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$newHeight = abs($newHeight);
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}
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if ($flags & self::STRETCH) { // non-proportional
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if (!$newWidth || !$newHeight) {
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throw new Nette\InvalidArgumentException('For stretching must be both width and height specified.');
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}
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if ($flags & self::SHRINK_ONLY) {
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$newWidth = (int) round($srcWidth * min(1, $newWidth / $srcWidth));
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$newHeight = (int) round($srcHeight * min(1, $newHeight / $srcHeight));
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}
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} else { // proportional
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if (!$newWidth && !$newHeight) {
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throw new Nette\InvalidArgumentException('At least width or height must be specified.');
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}
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$scale = [];
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if ($newWidth > 0) { // fit width
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$scale[] = $newWidth / $srcWidth;
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}
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if ($newHeight > 0) { // fit height
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$scale[] = $newHeight / $srcHeight;
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}
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if ($flags & self::FILL) {
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$scale = [max($scale)];
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}
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if ($flags & self::SHRINK_ONLY) {
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$scale[] = 1;
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}
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$scale = min($scale);
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$newWidth = (int) round($srcWidth * $scale);
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$newHeight = (int) round($srcHeight * $scale);
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}
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return [max($newWidth, 1), max($newHeight, 1)];
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}
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/**
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* Crops image.
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* @param int|string $left in pixels or percent
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* @param int|string $top in pixels or percent
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* @param int|string $width in pixels or percent
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* @param int|string $height in pixels or percent
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* @return static
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*/
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public function crop($left, $top, $width, $height)
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{
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[$r['x'], $r['y'], $r['width'], $r['height']]
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= static::calculateCutout($this->getWidth(), $this->getHeight(), $left, $top, $width, $height);
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if (gd_info()['GD Version'] === 'bundled (2.1.0 compatible)') {
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$this->image = imagecrop($this->image, $r);
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imagesavealpha($this->image, true);
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} else {
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$newImage = static::fromBlank($r['width'], $r['height'], self::RGB(0, 0, 0, 127))->getImageResource();
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imagecopy($newImage, $this->image, 0, 0, $r['x'], $r['y'], $r['width'], $r['height']);
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$this->image = $newImage;
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}
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return $this;
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}
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/**
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* Calculates dimensions of cutout in image.
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* @param int|string $left in pixels or percent
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* @param int|string $top in pixels or percent
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* @param int|string $newWidth in pixels or percent
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* @param int|string $newHeight in pixels or percent
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|
*/
|
|
public static function calculateCutout(int $srcWidth, int $srcHeight, $left, $top, $newWidth, $newHeight): array
|
|
{
|
|
if (self::isPercent($newWidth)) {
|
|
$newWidth = (int) round($srcWidth / 100 * $newWidth);
|
|
}
|
|
|
|
if (self::isPercent($newHeight)) {
|
|
$newHeight = (int) round($srcHeight / 100 * $newHeight);
|
|
}
|
|
|
|
if (self::isPercent($left)) {
|
|
$left = (int) round(($srcWidth - $newWidth) / 100 * $left);
|
|
}
|
|
|
|
if (self::isPercent($top)) {
|
|
$top = (int) round(($srcHeight - $newHeight) / 100 * $top);
|
|
}
|
|
|
|
if ($left < 0) {
|
|
$newWidth += $left;
|
|
$left = 0;
|
|
}
|
|
|
|
if ($top < 0) {
|
|
$newHeight += $top;
|
|
$top = 0;
|
|
}
|
|
|
|
$newWidth = min($newWidth, $srcWidth - $left);
|
|
$newHeight = min($newHeight, $srcHeight - $top);
|
|
return [$left, $top, $newWidth, $newHeight];
|
|
}
|
|
|
|
|
|
/**
|
|
* Sharpens image a little bit.
|
|
* @return static
|
|
*/
|
|
public function sharpen()
|
|
{
|
|
imageconvolution($this->image, [ // my magic numbers ;)
|
|
[-1, -1, -1],
|
|
[-1, 24, -1],
|
|
[-1, -1, -1],
|
|
], 16, 0);
|
|
return $this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Puts another image into this image.
|
|
* @param int|string $left in pixels or percent
|
|
* @param int|string $top in pixels or percent
|
|
* @param int $opacity 0..100
|
|
* @return static
|
|
*/
|
|
public function place(self $image, $left = 0, $top = 0, int $opacity = 100)
|
|
{
|
|
$opacity = max(0, min(100, $opacity));
|
|
if ($opacity === 0) {
|
|
return $this;
|
|
}
|
|
|
|
$width = $image->getWidth();
|
|
$height = $image->getHeight();
|
|
|
|
if (self::isPercent($left)) {
|
|
$left = (int) round(($this->getWidth() - $width) / 100 * $left);
|
|
}
|
|
|
|
if (self::isPercent($top)) {
|
|
$top = (int) round(($this->getHeight() - $height) / 100 * $top);
|
|
}
|
|
|
|
$output = $input = $image->image;
|
|
if ($opacity < 100) {
|
|
$tbl = [];
|
|
for ($i = 0; $i < 128; $i++) {
|
|
$tbl[$i] = round(127 - (127 - $i) * $opacity / 100);
|
|
}
|
|
|
|
$output = imagecreatetruecolor($width, $height);
|
|
imagealphablending($output, false);
|
|
if (!$image->isTrueColor()) {
|
|
$input = $output;
|
|
imagefilledrectangle($output, 0, 0, $width, $height, imagecolorallocatealpha($output, 0, 0, 0, 127));
|
|
imagecopy($output, $image->image, 0, 0, 0, 0, $width, $height);
|
|
}
|
|
|
|
for ($x = 0; $x < $width; $x++) {
|
|
for ($y = 0; $y < $height; $y++) {
|
|
$c = \imagecolorat($input, $x, $y);
|
|
$c = ($c & 0xFFFFFF) + ($tbl[$c >> 24] << 24);
|
|
\imagesetpixel($output, $x, $y, $c);
|
|
}
|
|
}
|
|
|
|
imagealphablending($output, true);
|
|
}
|
|
|
|
imagecopy(
|
|
$this->image,
|
|
$output,
|
|
$left,
|
|
$top,
|
|
0,
|
|
0,
|
|
$width,
|
|
$height
|
|
);
|
|
return $this;
|
|
}
|
|
|
|
|
|
/**
|
|
* Saves image to the file. Quality is in the range 0..100 for JPEG (default 85), WEBP (default 80) and AVIF (default 30) and 0..9 for PNG (default 9).
|
|
* @throws ImageException
|
|
*/
|
|
public function save(string $file, ?int $quality = null, ?int $type = null): void
|
|
{
|
|
$type = $type ?? self::extensionToType(pathinfo($file, PATHINFO_EXTENSION));
|
|
$this->output($type, $quality, $file);
|
|
}
|
|
|
|
|
|
/**
|
|
* Outputs image to string. Quality is in the range 0..100 for JPEG (default 85), WEBP (default 80) and AVIF (default 30) and 0..9 for PNG (default 9).
|
|
*/
|
|
public function toString(int $type = self::JPEG, ?int $quality = null): string
|
|
{
|
|
return Helpers::capture(function () use ($type, $quality) {
|
|
$this->output($type, $quality);
|
|
});
|
|
}
|
|
|
|
|
|
/**
|
|
* Outputs image to string.
|
|
*/
|
|
public function __toString(): string
|
|
{
|
|
try {
|
|
return $this->toString();
|
|
} catch (\Throwable $e) {
|
|
if (func_num_args() || PHP_VERSION_ID >= 70400) {
|
|
throw $e;
|
|
}
|
|
|
|
trigger_error('Exception in ' . __METHOD__ . "(): {$e->getMessage()} in {$e->getFile()}:{$e->getLine()}", E_USER_ERROR);
|
|
return '';
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Outputs image to browser. Quality is in the range 0..100 for JPEG (default 85), WEBP (default 80) and AVIF (default 30) and 0..9 for PNG (default 9).
|
|
* @throws ImageException
|
|
*/
|
|
public function send(int $type = self::JPEG, ?int $quality = null): void
|
|
{
|
|
header('Content-Type: ' . self::typeToMimeType($type));
|
|
$this->output($type, $quality);
|
|
}
|
|
|
|
|
|
/**
|
|
* Outputs image to browser or file.
|
|
* @throws ImageException
|
|
*/
|
|
private function output(int $type, ?int $quality, ?string $file = null): void
|
|
{
|
|
switch ($type) {
|
|
case self::JPEG:
|
|
$quality = $quality === null ? 85 : max(0, min(100, $quality));
|
|
$success = @imagejpeg($this->image, $file, $quality); // @ is escalated to exception
|
|
break;
|
|
|
|
case self::PNG:
|
|
$quality = $quality === null ? 9 : max(0, min(9, $quality));
|
|
$success = @imagepng($this->image, $file, $quality); // @ is escalated to exception
|
|
break;
|
|
|
|
case self::GIF:
|
|
$success = @imagegif($this->image, $file); // @ is escalated to exception
|
|
break;
|
|
|
|
case self::WEBP:
|
|
$quality = $quality === null ? 80 : max(0, min(100, $quality));
|
|
$success = @imagewebp($this->image, $file, $quality); // @ is escalated to exception
|
|
break;
|
|
|
|
case self::AVIF:
|
|
$quality = $quality === null ? 30 : max(0, min(100, $quality));
|
|
$success = @imageavif($this->image, $file, $quality); // @ is escalated to exception
|
|
break;
|
|
|
|
case self::BMP:
|
|
$success = @imagebmp($this->image, $file); // @ is escalated to exception
|
|
break;
|
|
|
|
default:
|
|
throw new Nette\InvalidArgumentException("Unsupported image type '$type'.");
|
|
}
|
|
|
|
if (!$success) {
|
|
throw new ImageException(Helpers::getLastError() ?: 'Unknown error');
|
|
}
|
|
}
|
|
|
|
|
|
/**
|
|
* Call to undefined method.
|
|
* @return mixed
|
|
* @throws Nette\MemberAccessException
|
|
*/
|
|
public function __call(string $name, array $args)
|
|
{
|
|
$function = 'image' . $name;
|
|
if (!function_exists($function)) {
|
|
ObjectHelpers::strictCall(static::class, $name);
|
|
}
|
|
|
|
foreach ($args as $key => $value) {
|
|
if ($value instanceof self) {
|
|
$args[$key] = $value->getImageResource();
|
|
|
|
} elseif (is_array($value) && isset($value['red'])) { // rgb
|
|
$args[$key] = imagecolorallocatealpha(
|
|
$this->image,
|
|
$value['red'],
|
|
$value['green'],
|
|
$value['blue'],
|
|
$value['alpha']
|
|
) ?: imagecolorresolvealpha(
|
|
$this->image,
|
|
$value['red'],
|
|
$value['green'],
|
|
$value['blue'],
|
|
$value['alpha']
|
|
);
|
|
}
|
|
}
|
|
|
|
$res = $function($this->image, ...$args);
|
|
return $res instanceof \GdImage || (is_resource($res) && get_resource_type($res) === 'gd')
|
|
? $this->setImageResource($res)
|
|
: $res;
|
|
}
|
|
|
|
|
|
public function __clone()
|
|
{
|
|
ob_start(function () {});
|
|
imagepng($this->image, null, 0);
|
|
$this->setImageResource(imagecreatefromstring(ob_get_clean()));
|
|
}
|
|
|
|
|
|
/**
|
|
* @param int|string $num in pixels or percent
|
|
*/
|
|
private static function isPercent(&$num): bool
|
|
{
|
|
if (is_string($num) && substr($num, -1) === '%') {
|
|
$num = (float) substr($num, 0, -1);
|
|
return true;
|
|
} elseif (is_int($num) || $num === (string) (int) $num) {
|
|
$num = (int) $num;
|
|
return false;
|
|
}
|
|
|
|
throw new Nette\InvalidArgumentException("Expected dimension in int|string, '$num' given.");
|
|
}
|
|
|
|
|
|
/**
|
|
* Prevents serialization.
|
|
*/
|
|
public function __sleep(): array
|
|
{
|
|
throw new Nette\NotSupportedException('You cannot serialize or unserialize ' . self::class . ' instances.');
|
|
}
|
|
}
|