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<?php
/**
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @file
*/
/**
* Convenience class for working with XHProf
* <https://github.com/phacility/xhprof>. XHProf can be installed as a PECL
* package for use with PHP5 (Zend PHP) and is built-in to HHVM 3.3.0.
*
* This also supports using the Tideways profiler
* <https://github.com/tideways/php-profiler-extension>, which additionally
* has support for PHP7.
*
* @since 1.28
*/
class Xhprof {
/**
* @var bool $enabled Whether XHProf is currently running.
*/
protected static $enabled;
/**
* Start xhprof profiler
* @return bool
*/
public static function isEnabled() {
return self::$enabled;
}
/**
* Start xhprof profiler
* @param int $flags
* @param array $options
* @throws Exception
*/
public static function enable( $flags = 0, $options = [] ) {
if ( self::isEnabled() ) {
throw new Exception( 'Profiling is already enabled.' );
}
self::$enabled = true;
if ( function_exists( 'xhprof_enable' ) ) {
xhprof_enable( $flags, $options );
} elseif ( function_exists( 'tideways_enable' ) ) {
tideways_enable( $flags, $options );
} else {
throw new Exception( "Neither xhprof nor tideways are installed" );
}
}
/**
* Stop xhprof profiler
*
* @return array|null xhprof data from the run, or null if xhprof was not running.
*/
public static function disable() {
if ( self::isEnabled() ) {
self::$enabled = false;
if ( function_exists( 'xhprof_disable' ) ) {
return xhprof_disable();
} else {
// tideways
return tideways_disable();
}
}
}
}
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