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[Debug] Symfony debug extension #10500

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[Debug] Symfony debug extension
Mar 7, 2014
72d08c1
[Debug] a README for the debug extension
nicolas-grekas Mar 20, 2014
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[Debug] a README for the debug extension
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@nicolas-grekas
nicolas-grekas committed Mar 26, 2014
commit 72d08c116eaae5b2a4cf93e312e49e40bb686595
71 changes: 71 additions & 0 deletions src/Symfony/Component/Debug/Resources/ext/README.rst
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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 currenlty 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]),
);
break;

case 'resource':
$info += array(
'resource_id' => (int) substr((string) $array[$key], 13),
'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

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