/**
* Constructor
* Initialize the object, figure out if profiling is enabled, and if so,
* start the profile.
* @return p3_profiler
*/
public function __construct()
{
// Set up paths
$this->_P3_PATH = realpath(dirname(__FILE__));
// Debug mode
$this->_debug_entry = array('profiling_enabled' => false, 'recording_ip' => '', 'scan_name' => '', 'recording' => false, 'disable_optimizers' => false, 'url' => $this->_get_url(), 'visitor_ip' => p3_profiler_get_ip(), 'time' => time(), 'pid' => getmypid());
// Check to see if we should profile
$opts = array();
if (function_exists('get_option')) {
$opts = get_option('p3-profiler_options');
if (!empty($opts['profiling_enabled'])) {
if (isset($this->_debug_entry)) {
$this->_debug_entry['profiling_enabled'] = true;
$this->_debug_entry['scan_name'] = $opts['profiling_enabled']['name'];
$this->_debug_entry['recording_ip'] = $opts['profiling_enabled']['ip'];
$this->_debug_entry['disable_optimizers'] = $opts['profiling_enabled']['disable_opcode_cache'];
}
}
}
// Add a global flag to let everyone know we're profiling
if (!empty($opts) && preg_match('/' . $opts['profiling_enabled']['ip'] . '/', p3_profiler_get_ip())) {
define('WPP_PROFILING_STARTED', true);
}
// Save the debug info
$this->_debug_entry['recording'] = defined('WPP_PROFILING_STARTED');
// Check the profiling flag
if (!defined('WPP_PROFILING_STARTED')) {
return $this;
}
// Emergency shut off switch
if (isset($_REQUEST['P3_SHUTOFF']) && !empty($_REQUEST['P3_SHUTOFF'])) {
p3_profiler_disable();
return $this;
}
// Hook shutdown
register_shutdown_function(array($this, 'shutdown_handler'));
// Error detection
$flag = get_option('p3_profiler-error_detection');
if (!empty($flag) && $flag > time() + 60) {
p3_profiler_disable();
return $this;
}
// Set the error detection flag
if (empty($flag)) {
update_option('p3_profiler-error_detection', time());
}
// Kludge memory limit / time limit
if ((int) @ini_get('memory_limit') < 256) {
@ini_set('memory_limit', '256M');
}
@set_time_limit(90);
// Set the profile file
$this->_profile_filename = $opts['profiling_enabled']['name'] . '.json';
// Start timing
$this->_start_time = microtime(true);
$this->_last_call_start = microtime(true);
// Reset state
$this->_last_call_time = 0;
$this->_runtime = 0;
$this->_plugin_runtime = 0;
$this->_core = 0;
$this->_theme = 0;
$this->_last_call_category = self::CATEGORY_CORE;
$this->_last_stack = array();
// Add some startup information
$this->_profile = array('url' => $this->_get_url(), 'ip' => p3_profiler_get_ip(), 'pid' => getmypid(), 'date' => @date('c'), 'stack' => array());
// Disable opcode optimizers. These "optimize" calls out of the stack
// and hide calls from the tick handler and backtraces
if ($opts['profiling_enabled']['disable_opcode_cache']) {
if (extension_loaded('xcache')) {
@ini_set('xcache.optimizer', false);
// Will be implemented in 2.0, here for future proofing
// XCache seems to do some optimizing, anyway. The recorded stack size is smaller with xcache.cacher enabled than without.
} elseif (extension_loaded('apc')) {
@ini_set('apc.optimization', 0);
// Removed in APC 3.0.13 (2007-02-24)
apc_clear_cache();
} elseif (extension_loaded('eaccelerator')) {
@ini_set('eaccelerator.optimizer', 0);
if (function_exists('eaccelerator_optimizer')) {
@eaccelerator_optimizer(false);
}
// If you're reading this, try setting eaccelerator.optimizer = 0 in a .user.ini or .htaccess file
} elseif (extension_loaded('Zend Optimizer+')) {
@ini_set('zend_optimizerplus.optimization_level', 0);
}
// Tested with wincache
// Tested with ioncube
// Tested with zend guard loader
}
// Monitor all function-calls
declare (ticks=1);
register_tick_function(array($this, 'tick_handler'));
}
/**
* Stop scan
*/
public static function ajax_stop_scan()
{
// Check nonce
if (!check_admin_referer('p3_ajax_stop_scan', 'p3_nonce')) {
wp_die(__('You do not have sufficient permissions to access this page.'));
}
// Get current options
$opts = get_option('p3-profiler_options');
$opts = $opts['profiling_enabled'];
// Turn off scanning
p3_profiler_disable();
// Tell the user what happened
self::add_notice(__('Turned off performance scanning.', 'p3-profiler'));
// Return the last filename
if (!empty($opts) && is_array($opts) && array_key_exists('name', $opts)) {
echo $opts['name'] . '.json';
self::ajax_die('');
} else {
self::ajax_die(0);
}
}