debug_print_backtrace
(PHP 5)
debug_print_backtrace — Prints a backtrace
说明
void debug_print_backtrace ([ int $options = 0 [, int $limit = 0 ]] )debug_print_backtrace() prints a PHP backtrace. It prints the function calls, included/required files and eval()ed stuff.
参数
- options
-
As of 5.3.6, this parameter is a bitmask for the following options:
debug_print_backtrace() options DEBUG_BACKTRACE_IGNORE_ARGS Whether or not to omit the "args" index, and thus all the function/method arguments, to save memory. - limit
-
As of 5.4.0, this parameter can be used to limit the number of stack frames printed. By default (limit=0) it prints all stack frames.
返回值
没有返回值。
更新日志
| 版本 | 说明 |
|---|---|
| 5.4.0 | Added the optional parameter limit. |
| 5.3.6 | Added the optional parameter options. |
范例
Example #1 debug_print_backtrace() example 以上例程的输出类似于：
<?php
// include.php file
function a() {
b();
}
function b() {
c();
}
function c(){
debug_print_backtrace();
}
a();
?>
<?php
// test.php file
// this is the file you should run
include 'include.php';
?>
#0 c() called at [/tmp/include.php:10]
#1 b() called at [/tmp/include.php:6]
#2 a() called at [/tmp/include.php:17]
#3 include(/tmp/include.php) called at [/tmp/test.php:3]
参见
- debug_backtrace() - Generates a backtrace
