问题
I'm going through a customer's server, running crazy proprietary forum software (vBulletin) and even worse SEO mods (vbseo). I cannot figure out where the php code for a page is coming from! How to trace this URL back to a PHP page: http://www.example.com/forum/members/connie.html I just joined a project with the code based on a heavily modified vBullitin install with the VBSEO plugin. This particular plugin is horrific spaghetti code with tens of include()s, .htaccess redirects and possibly .httpd.conf changes. Then it pulls strings from a database so I cannot even use grep to find the code file!
Is there any way to stack-trace PHP to log all the code that runs to produce a page? I have root access but I am not supposed to stop or restart the server. A simple list of the include() hierarchy of files that went into producing the page would suffice.
Note that I cannot use debug_backtrace because I don't know where the code I'm looking for is! The debug_backtrace function is the exact opposite of what I need.
Thanks.
回答1:
Sounds like you need to step through it with Xdebug. Most common IDE's support it such as Netbeans and PHPStorm.
Resources:
- Tracing PHP apps with Xdebug
- Xdebug with Netbeans
- Xdebug with PHPstorm (I recommend)
- Xdebug with Eclipse
- Chrome Xdebug extension (I recommend)
- Firefox Xdebug plug-in
In both the above mentioned IDE's, you can CTRL+Click a function/method and it will take you to the line in the file where it is defined. You can also track usages for both functions and variables.
Tracing code is built-in to xdebug. Here's an example from Zend:
<?php
xdebug_start_trace('c:/data/fac.xt');
print fac(7);
function fac($x)
{
if (0 == $x) return 1;
return $x * fac($x - 1);
}
xdebug_stop_trace();
?>
Trace file output:
TRACE START [2007-10-26 12:18:48]
0.0068 53384 -> fac() C:\www\fac.php:5
0.0069 53584 -> fac() C:\www\fac.php:10
0.0069 53840 -> fac() C:\www\fac.php:10
0.0070 54096 -> fac() C:\www\fac.php:10
0.0070 54376 -> fac() C:\www\fac.php:10
0.0071 54656 -> fac() C:\www\fac.php:10
0.0072 54936 -> fac() C:\www\fac.php:10
0.0072 55216 -> fac() C:\www\fac.php:10
0.0073 55392 -> xdebug_stop_trace() C:\www\fac.php:13
0.0237 55392
TRACE END [2007-10-26 12:18:48]
回答2:
Check out the debug_backtrace function - this should always be available, even on production servers.
回答3:
You can also use the apd extension; this will write a file for each request containing a log of what PHP functions were called during the request.
回答4:
phptrace is an awesome and simple tool to trace php code executions, you can have a try.
回答5:
To trace the origin of a specific function, you can do this:
$reflFunc = new ReflectionFunction('function_name');
print $reflFunc->getFileName() . ':' . $reflFunc->getStartLine();
See How to find out where a function is defined?
To trace the origin of a specific class, you can do this:
$reflClass = new ReflectionClass('class_name');
print $reflClass->getFileName() . ':' . $reflClass->getStartLine();
To get a list of all the includes that went into making a page, you can do this:
var_dump(get_included_files());
To get a list of all the functions that are defined on a page, you can do this:
var_dump(get_defined_functions());
To get a list of all the user-defined functions on a page, you can do this:
$defined_functions = get_defined_functions();
var_dump($defined_functions["user"]);
来源:https://stackoverflow.com/questions/7222160/trace-where-code-is-coming-from-php