Symfony Debug Extension
=======================
This extension adds a ``symfony_zval_info($key, $array, $options = 0)`` function that:
- exposes zval_hash/refcounts, allowing e.g. efficient exploration of arbitrary structures in PHP,
- does work with references, preventing memory copying.
Its behavior is about the same as:
.. code-block:: php
<?php
function symfony_zval_info($key, $array, $options = 0)
{
// $options is currently not used, but could be in future version.
if (!array_key_exists($key, $array)) {
return null;
}
$info = array(
'type' => gettype($array[$key]),
'zval_hash' => /* hashed memory address of $array[$key] */,
'zval_refcount' => /* internal zval refcount of $array[$key] */,
'zval_isref' => /* is_ref status of $array[$key] */,
);
switch ($info['type']) {
case 'object':
$info += array(
'object_class' => get_class($array[$key]),
'object_refcount' => /* internal object refcount of $array[$key] */,
'object_hash' => spl_object_hash($array[$key]),
'object_handle' => /* internal object handle $array[$key] */,
);
break;
case 'resource':
$info += array(
'resource_handle' => (int) $array[$key],
'resource_type' => get_resource_type($array[$key]),
'resource_refcount' => /* internal resource refcount of $array[$key] */,
);
break;
case 'array':
$info += array(
'array_count' => count($array[$key]),
);
break;
case 'string':
$info += array(
'strlen' => strlen($array[$key]),
);
break;
}
return $info;
}
To enable the extension from source, run:
.. code-block:: sh
phpize
./configure
make
sudo make install
