xhprof_enable
(PECL xhprof >= 0.9.0)
xhprof_enable — Start xhprof profiler
Description
xhprof_enable ([ int $flags = 0 [, array $options ]] ) : void
Start xhprof profiling.
Parameters
-
flags -
Optional flags to add additional information to the profiling. See the XHprof constants for further information about these flags, e.g.,
XHPROF_FLAGS_MEMORYto enable memory profiling. -
options -
An array of optional options, namely, the 'ignored_functions' option to pass in functions to be ignored during profiling.
Return Values
null
Changelog
| Version | Description |
|---|---|
| PECL xhprof 0.9.2 | The optional options parameter was added. |
Examples
Example #1 xhprof_enable() examples
<?php
// 1. elapsed time + memory + CPU profiling; and ignore built-in (internal) functions
xhprof_enable(XHPROF_FLAGS_NO_BUILTINS | XHPROF_FLAGS_CPU | XHPROF_FLAGS_MEMORY);
// 2. elapsed time profiling; ignore call_user_func* during profiling
xhprof_enable(
0,
array('ignored_functions' => array('call_user_func',
'call_user_func_array')));
// 3. elapsed time + memory profiling; ignore call_user_func* during profiling
xhprof_enable(
XHPROF_FLAGS_MEMORY,
array('ignored_functions' => array('call_user_func',
'call_user_func_array')));
?> See Also
- xhprof_disable() - Stops xhprof profiler
- xhprof_sample_enable() - Start XHProf profiling in sampling mode
- memory_get_usage() - Returns the amount of memory allocated to PHP
- getrusage() - Gets the current resource usages
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Licensed under the Creative Commons Attribution License v3.0 or later.
https://www.php.net/manual/en/function.xhprof-enable.php