PHP Debug_backtrace () function

PHP Error and Logging functions

Instance

Generate PHP BackTrace:

<?php function A ($txt) {     B ("Glenn"),} function B ($txt) {     C ("Cleveland"),} function C ($txt) {     var_dump (debug_backtrace()

The output of the above code is similar to this:

Array (     [0] = = Array (         [file] = C:\webfolder\test.php         [line] = 6         [function] + C         [args] ] = = Array (             [0] = Cleveland         )     )     [1] = = Array (         [file] = C:\webfolder\test.php         [ Line] = 3         [function] = b         [args] = array (             [0] = Glenn         )     )     [2] = = Array ( C17/>[file] = C:\webfolder\test.php         [line] = [         function] = a         [args] + Array (             [0] (Peter         )))     

Definition and usage

The Debug_backtrace () function generates a backtrace (backtracking trace).

The function displays the data generated by the Debug_backtrace () function code.

Returns an associative array. The elements that might be returned are as follows:

name	type	Description
function	String	Current function name
Line	Integer	Current line number
File	String	Current file name
Class	String	Current class name
Object	Object	Current Object
Type	String	The current invocation type. Possible calls: return: "--"-Method call Return: "::"-static method call Return Nothing-function call
Args	Array	If the function parameter is listed in the function. If in the referenced file, list the referenced file name.

Grammar

Debug_backtrace (options,limit);

Parameters	Description
Options	Optional. Bitmask that specifies the following options: Debug_backtrace_provide_object (whether to populate the index of "OBJECT") Debug_backtrace_ignore_args (whether to ignore the "ARGS" index, including all the Function/method parameters, can save memory overhead.) ）
Limit	Optional. Limits the number of stack frames returned. The default is (limit=0), which returns all stack frames.

Technical details

return value:	None
PHP version:	4.3+
PHP Update Log	PHP 5.4: Added optional parameter limit. PHP 5.3.6: Parameter provide_object is changed to options, and optional parameter Debug_backtrace_ignore_args is added. PHP 5.2.5: Optional parameter provide_objectis added. PHP 5.1.1: Added the current object as an element that may be returned.

PHP Error and Logging functions

PHP Debug_backtrace () function