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-Symfony Debug Extension for PHP 5
-=================================
-
-This extension publishes several functions to help building powerful debugging tools.
-It is compatible with PHP 5.3, 5.4, 5.5 and 5.6; with ZTS and non-ZTS modes.
-It is not required thus not provided for PHP 7.
-
-symfony_zval_info()
--------------------
-
-- 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:
-
-```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;
-}
-```
-
-symfony_debug_backtrace()
--------------------------
-
-This function works like debug_backtrace(), except that it can fetch the full backtrace in case of fatal errors:
-
-```php
-function foo() { fatal(); }
-function bar() { foo(); }
-
-function sd() { var_dump(symfony_debug_backtrace()); }
-
-register_shutdown_function('sd');
-
-bar();
-
-/* Will output
-Fatal error: Call to undefined function fatal() in foo.php on line 42
-array(3) {
- [0]=>
- array(2) {
- ["function"]=>
- string(2) "sd"
- ["args"]=>
- array(0) {
- }
- }
- [1]=>
- array(4) {
- ["file"]=>
- string(7) "foo.php"
- ["line"]=>
- int(1)
- ["function"]=>
- string(3) "foo"
- ["args"]=>
- array(0) {
- }
- }
- [2]=>
- array(4) {
- ["file"]=>
- string(102) "foo.php"
- ["line"]=>
- int(2)
- ["function"]=>
- string(3) "bar"
- ["args"]=>
- array(0) {
- }
- }
-}
-*/
-```
-
-Usage
------
-
-To enable the extension from source, run:
-
-```
- phpize
- ./configure
- make
- sudo make install
-```