debug_backtrace
(PHP 4 >= 4.3.0, PHP 5)
debug_backtrace -- Generates a backtrace
Description
array
debug_backtrace ( void )
debug_backtrace() generates a PHP backtrace.
Return Values
Returns an associative array. The possible returned elements are as follows:
Table 1. Possible returned elements from debug_backtrace()
| Name | Type | Description |
|---|
| function | string |
The current function name. See also __FUNCTION__. |
| line | integer |
The current line number. See also __LINE__. |
| file | string |
The current file name. See also __FILE__. |
| class | string |
The current class name. See also __CLASS__ |
| type | string |
The current call type. If a method call, "->" is returned. If a static method call, "::" is returned. If a function call, nothing is returned. |
| args | array |
If inside a function, this lists the functions arguments. If inside an included file, this lists the included file name(s). |
Examples
Example 1. debug_backtrace() example <?php
// filename: a.php
function a_test($str)
{
echo "\nHi: $str";
var_dump(debug_backtrace());
}
a_test('friend');
?>
<?php
// filename: b.php
include_once '/tmp/a.php';
?> |
Results similar to the following when executing /tmp/b.php: Hi: friend array(2) { [0]=> array(4) { ["file"] => string(10) "/tmp/a.php" ["line"] => int(10) ["function"] => string(6) "a_test" ["args"]=> array(1) { [0] => &string(6) "friend" } } [1]=> array(4) { ["file"] => string(10) "/tmp/b.php" ["line"] => int(2) ["args"] => array(1) { [0] => string(10) "/tmp/a.php" } ["function"] => string(12) "include_once" } } |
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