My first commit of codes

vendor/phenx/php-font-lib/classes/Font_Table_head.php

@@ -0,0 +1,42 @@
+<?php
+/**
+ * @package php-font-lib
+ * @link    https://github.com/PhenX/php-font-lib
+ * @author  Fabien Ménager <fabien.menager@gmail.com>
+ * @license http://www.gnu.org/copyleft/lesser.html GNU Lesser General Public License
+ */
+
+/**
+ * `head` font table.
+ * 
+ * @package php-font-lib
+ */
+class Font_Table_head extends Font_Table {
+  protected $def = array(
+    "tableVersion"       => self::Fixed,
+    "fontRevision"       => self::Fixed,
+    "checkSumAdjustment" => self::uint32,
+    "magicNumber"        => self::uint32,
+    "flags"              => self::uint16,
+    "unitsPerEm"         => self::uint16,
+    "created"            => self::longDateTime,
+    "modified"           => self::longDateTime,
+    "xMin"               => self::FWord,
+    "yMin"               => self::FWord,
+    "xMax"               => self::FWord,
+    "yMax"               => self::FWord,
+    "macStyle"           => self::uint16,
+    "lowestRecPPEM"      => self::uint16,
+    "fontDirectionHint"  => self::int16,
+    "indexToLocFormat"   => self::int16,
+    "glyphDataFormat"    => self::int16,
+  );
+  
+  protected function _parse(){
+    parent::_parse();
+    
+    if($this->data["magicNumber"] != 0x5F0F3CF5) {
+      throw new Exception("Incorrect magic number (".dechex($this->data["magicNumber"]).")");
+    }
+  }
+}