PHP debugging tool debug_print_backtrace()_PHP tutorial

If we want to know who called a certain method? debug_print_backtrace can solve it
debug_print_backtrace() can print out the calling process of a page, and it is clear where it comes from.
But this is a proprietary function of PHP5 , Fortunately, there is already an implementation in pear,
http://pear.php.net/package/PHP_Compat

Test code

Copy code The code is as follows:

class a{
function say($msg) {
echo "msg:".$msg;
echo "

";debug_print_backtrace(); 
} 
} 

class b { 
function say($msg) { 
$a = new a() ; 
$a->say($msg); 
} 
} 

class c { 
function __construct($msg) { 
$b = new b (); 
$b->say($msg); 
} 
} 

$c = new c("test"); 

Output results

Copy code The code is as follows:

msg:test
#0 a->say(test ) called at [/var/www/test/test0723.php:12]
#1 b->say(test) called at [/var/www/test/test0723.php:19]
# 2 c->__construct(test) called at [/var/www/test/test0723.php:23]

Related links

http://ch2.php. net/manual/zh/function.debug-print-backtrace.php
http://ch2.php.net/manual/zh/function.debug-backtrace.php

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