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debug_backtracedebug_backtrace (PHP 4 >= 4.3.0, PHP 5) debug_backtrace -- Generates a backtrace Descriptionarray 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__
| | object | object |
The current object.
| | 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).
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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';
?>
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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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