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| 1 | +Symfony Debug Extension |
| 2 | +======================= |
| 3 | + |
| 4 | +This extension adds a ``symfony_zval_info($key, $array, $options = 0)`` function that: |
| 5 | + |
| 6 | +- exposes zval_hash/refcounts, allowing e.g. efficient exploration of arbitrary structures in PHP, |
| 7 | +- does work with references, preventing memory copying. |
| 8 | + |
| 9 | +Its behavior is about the same as: |
| 10 | + |
| 11 | +.. code-block:: php |
| 12 | +
|
| 13 | + <?php |
| 14 | +
|
| 15 | + function symfony_zval_info($key, $array, $options = 0) |
| 16 | + { |
| 17 | + // $options is currently not used, but could be in future version. |
| 18 | +
|
| 19 | + if (!array_key_exists($key, $array)) { |
| 20 | + return null; |
| 21 | + } |
| 22 | +
|
| 23 | + $info = array( |
| 24 | + 'type' => gettype($array[$key]), |
| 25 | + 'zval_hash' => /* hashed memory address of $array[$key] */, |
| 26 | + 'zval_refcount' => /* internal zval refcount of $array[$key] */, |
| 27 | + 'zval_isref' => /* is_ref status of $array[$key] */, |
| 28 | + ); |
| 29 | +
|
| 30 | + switch ($info['type']) { |
| 31 | + case 'object': |
| 32 | + $info += array( |
| 33 | + 'object_class' => get_class($array[$key]), |
| 34 | + 'object_refcount' => /* internal object refcount of $array[$key] */, |
| 35 | + 'object_hash' => spl_object_hash($array[$key]), |
| 36 | + ); |
| 37 | + break; |
| 38 | +
|
| 39 | + case 'resource': |
| 40 | + $info += array( |
| 41 | + 'resource_id' => (int) substr((string) $array[$key], 13), |
| 42 | + 'resource_type' => get_resource_type($array[$key]), |
| 43 | + 'resource_refcount' => /* internal resource refcount of $array[$key] */, |
| 44 | + ); |
| 45 | + break; |
| 46 | +
|
| 47 | + case 'array': |
| 48 | + $info += array( |
| 49 | + 'array_count' => count($array[$key]), |
| 50 | + ); |
| 51 | + break; |
| 52 | +
|
| 53 | + case 'string': |
| 54 | + $info += array( |
| 55 | + 'strlen' => strlen($array[$key]), |
| 56 | + ); |
| 57 | + break; |
| 58 | + } |
| 59 | +
|
| 60 | + return $info; |
| 61 | + } |
| 62 | +
|
| 63 | +To enable the extension from source, run: |
| 64 | + |
| 65 | +.. code-block:: sh |
| 66 | +
|
| 67 | + phpize |
| 68 | + ./configure |
| 69 | + make |
| 70 | + sudo make install |
| 71 | +
|
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