(PHP 5, PHP 7)
Prints a backtrace
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.
Parameters:
options
As of 5.3.6, this parameter is a bitmask for the following 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.
Returns:
No value is returned.
Changelog:
5.4.0
Added the optional parameter limit
.
5.3.6
Added the optional parameter options
.
Examples:
debug_print_backtrace() example
<?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'; ?>
The above example will output something similar to:
#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]
See also:
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