If you've ever tried to optimize PHP code, sometimes finding the bottlenecks can be pretty difficult without the use of a really good debugger available for PHP. The purpose of this script is to provide a method of showing where a script spends most of its time.
By : jinxidoru
<?
/**
* The best way to use this script is to place
* it in a separate file, say: watcher.php.
* At the top of the file you want to profile,
* include watcher.php and follow the include
* with the statement:
* declare(ticks=1);
*
* At the end of the script, call watch_function_output()
* to see the results. The value returned in
* the output for each function call is the
* number of system ticks spent in each given
* function/method. These ticks relate to
* the number of lower-level operations the
* PHP engine must perform. For more information,
* check the php.net documentation under
* declare() or contact me:
* Michael Bailey "jinxidoru@byu.net"
*
* You are welcome to use this code to any end,
* be it for good or evil. Though, if it be for
* evil, I'd be interested in knowing what you're
* doing for the sake of curiousity.
*/
// tick function for watching functions
// if $ret_funcs is true, a tick is not registered,
// but instead, the function list is returned.
function watch_functions_tick($ret_funcs=false) {
static $funcs = array();
// do tick
if (!$ret_funcs) {
// get the current function from debug_backtrace
$trace = debug_backtrace();
$trace = $trace[1];
$func = $trace['function'];
if ($trace['class']) $func = $trace['class'].$trace['type'].$func;
// as long as the given function is a valid one, add it to the array
if ($func !== 'watch_functions_tick' && $func != 'unknown' && $func) {
$funcs[$func]++;
$funcs['__TICK_COUNT__']++;
}
// return the function array
} else {
return $funcs;
}
}
// output the function list with the number of ticks each
// function received as well as the percentage of the total
// ticks it represents
function watch_functions_output() {
// retrieve the function list
$funcs = watch_functions_tick(true);
$tick_count = $funcs['__TICK_COUNT__'];
arsort($funcs);
// add the percentage onto each function entry
foreach ($funcs AS $k => $v) {
$funcs[$k] = sprintf('%d (%.2f%%)', $funcs[$k], $funcs[$k]*100/$tick_count);
}
// display the function list
print "<pre>";
print_r($funcs);
print "</pre>";
}
// start the ticking
register_tick_function('watch_functions_tick');
?>
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