如何调试"Maximum execution time"致命错误？

Question

我正在尝试在我的应用程序中使用Zend_acl。我遵循了《Zend框架在行动》一书。我添加了这个助手：

<?php
/**
* Zend Framework
*
* LICENSE "removed for clarity"
*
/** Zend_Controller_Action_Helper_Abstract */
require_once 'Zend/Controller/Action/Helper/Abstract.php';

class Bravo_Controller_Action_Helper_Acl extends Zend_Controller_Action_Helper_Abstract
{
    protected $_action;
    protected $_auth;
    protected $_acl;
    protected $_controllerName;
    public function __construct(Zend_View_Interface $view = null, array $options = array())
    {
        $this->_auth = Zend_Auth::getInstance();
        $this->_acl = $options['acl'];
        //var_dump($this->_acl);die();
    }
    public function init()
    {
        $this->_action = $this->getActionController();
        // add resource for this controller
        $controller = $this->_action->getRequest()->getControllerName();
        if(!$this->_acl->has($controller)) {
            $this->_acl->add(new Zend_Acl_Resource($controller));
        }
    }
    public function preDispatch()
    {
        $role = 'guest';
        if ($this->_auth->hasIdentity()) {
            $user = $this->_auth->getIdentity();
            if(is_object($user)) {
                $role = $this->_auth->getIdentity()->getUral()->getUralAccessNbr();
            }
        }
        $request = $this->_action->getRequest();
        $controller = $request->getControllerName();
        $action = $request->getActionName();
        $module = $request->getModuleName();
        $this->_controllerName = $controller;
        $resource = $controller;
        $privilege = $action;
        if (!$this->_acl->has($resource)) {
            $resource = null;
        }
        //** EDIT: During my test, the user isn't allowed. I'm now suspecting the 4 requests setting to be wrong.
        if (!$this->_acl->isAllowed($role, $resource, $privilege)) {
            $request->setModuleName('default');
            $request->setControllerName('login');
            $request->setActionName('login');
            $request->setDispatched(false);            
        }
    }

    public function allow($roles = null, $actions = null)
    {
        $resource = $this->_controllerName;
        $this->_acl->allow($roles, $resource, $actions);
        return $this;
    }
    public function deny($roles = null, $actions = null)
    {
        $resource = $this->_controllerName;
        $this->_acl->deny($roles, $resource, $actions);
       return $this;
    }
}

和引导程序：

<?php
class Agenda_Bootstrap extends Zend_Application_Module_Bootstrap
{
    protected function _initAcl()
    {
        // acl action helper
        $acl = new Bravo_Acl_Acl();
        $aclHelper = new Bravo_Controller_Action_Helper_Acl(null, array('acl' => $acl));
        Zend_Controller_Action_HelperBroker::addHelper($aclHelper);
    }
}

控制器中未使用Helper。我试了试我的应用程序，看看是否一切正常，我得到了这个错误：

致命错误：第171行的/usr/share/php/ZendFramework-1.11.11/Zend/Filter/PregReplace.php中超过了30秒的最长执行时间

使用此调用堆栈：

Call Stack
#   Time    Memory  Function                                                Location
1   0.0001  314556  {main}( )                                               ../index.php:0
2   0.3275  2039356 Zend_Application->run( )                                ../index.php:29
3   0.3275  2039356 Zend_Application_Bootstrap_Bootstrap->run( )                ../Application.php:366
4   0.3276  2039412 Zend_Controller_Front->dispatch( )                      ../Bootstrap.php:97
5   31.7462 4813252 Zend_Controller_Dispatcher_Standard->dispatch( )        ../Front.php:954
6   31.7470 4813944 Zend_Controller_Action->__construct( )                      ../Standard.php:268
7   31.7470 4814144 Zend_Controller_Action_HelperBroker->__construct( )     ../Action.php:132
8   31.7472 4814924 Zend_Controller_Action_Helper_ViewRenderer->init( )     ../HelperBroker.php:253
9   31.7472 4814924 Zend_Controller_Action_Helper_ViewRenderer->initView( )     ../ViewRenderer.php:516
10  31.7473 4815260 Zend_Controller_Action_Helper_ViewRenderer->_getBasePath( ) ../ViewRenderer.php:469
11  31.7478 4815628 Zend_Filter_Inflector->filter( )                        ../ViewRenderer.php:393
12  31.7489 4816768 Zend_Filter_Word_CamelCaseToSeparator->filter( )        ../Inflector.php:473
13  31.7489 4816768 Zend_Filter_PregReplace->filter( )               ../CamelCaseToSeparator.php:46

我试图增加max_execution_time，但它总是一样的：前四个堆栈仍然不变，第五个堆栈反映了max_execution_time（30秒=>31.7462，40秒=>42.6546，依此类推）

所以我怀疑Zend_Controller_Front->dispatch( )是我的问题来源，但为什么它总是需要最长的时间？我有点困惑。有人知道我应该在哪里挖掘吗？

编辑：我将在调试中走得更远。当用户不被允许时，我现在怀疑我的助手中的4个请求设置是错误的。我也编辑了助手代码并添加了一条注释。

第二版：帕特里克，你说得太对了！！！我重新检查了一下，陷入了一个无限循环：不要访问登录页面=>转到登录页面：-D今天真是浪费时间。。。不管怎样，它的结局很好，谢谢大家。

Answer 1

if (!$this->_acl->isAllowed($role, $resource, $privilege)) {
    $request->setModuleName('default');
    $request->setControllerName('login');
    $request->setActionName('login');
    $request->setDispatched(false);            
}

你确定无论角色如何，你都有权访问登录控制器吗？

不管怎样，听起来就像你最终进入了一个无限循环，ZF的调度循环永远不会完成。

Answer 2

如果调试器不可用，可以使用纯PHP代码。这里有一个选项，使用一个名为CSysTracer的小助手类。

基于此接口：

abstract class CSTReportDelegate {
    abstract public function emitVariableChange( $variableName, $oldValue, $newValue );
    abstract public function emitVariableSetNew( $variableName, $newValue );
}

创建了这个具体实例

class CSTSimpleReportDelegate extends CSTReportDelegate {
    public function emitVariableChange( $variableName, $oldValue, $newValue ) {
        echo '<br />[global/change] '. $variableName . ' : ' . print_r( $oldValue, true ) . ' &rarr; ' . print_r( $newValue, true );
    }
    public function emitVariableSetNew( $variableName, $newValue ) {
        echo '<br />[global/init] '. $variableName . '   &rarr; ' . print_r( $newValue, TRUE );
    }
}

将其传递给CSysTracer:

CSysTracer::setReportDelegate( new CSTSimpleReportDelegate() );

并使用以下选项启用语句跟踪：

CSysTracer::start( 5 );

当CSTSimpleReportDelegate打印输出时，它可以将内容写入日志文件，例如对某些语句进行选择性写入。

注意，这个版本的CSysTracer跟踪全局变量的变化。重写它以记录每条语句非常简单。

CSysTracer使用PHP的tick函数：

class CSysTracer {
    static protected 
        $reportDelegate;
    static private 
        $globalState = array();
    static private  
        $traceableGlobals = array();
    static private 
        $globalTraceEnabled = FALSE;
    const 
        DEFAULT_TICK_AMOUNT = 1;
    static public 
    function setReportDelegate( CSTReportDelegate $aDelegate ) {
        self::$reportDelegate = $aDelegate;
    }

    static public 
    function start( $tickAmount = self::DEFAULT_TICK_AMOUNT ) {
        register_tick_function ( array( 'CSysTracer', 'handleTick' ) );
    }

    static public 
    function stop() {
        unregister_tick_function( array( 'CSysTracer', 'handleTick' ) );
    }
    static public 
    function evalAndTrace( $someStatement ) {
        declare( ticks = 1 ); {
            self::start();
            eval( $someStatement );
            self::stop();
        }
    }
    static public 
    function addTraceableGlobal( $varName ) {
        if ( is_array( $varName )) {
            foreach( $varName as $singleName ) {
                self::addTraceableGlobal( $singleName ); 
            }
            return;
        }
        self::$traceableGlobals[ $varName ] = $varName;
    }
    static public 
    function removeTraceableGlobal( $varName ) {
        unset( self::$traceableGlobals[ $varName ] );   
    }
    /**
     * Main function called at each tick. Calls those functions, which
     * really perform the checks.
     * 
     */
    static public 
    function handleTick( ) {
        if ( TRUE === self::$globalTraceEnabled ) { 
            self::traceGlobalVariable();
        }
    }
    static public 
    function enableGlobalsTrace() {
        self::$globalTraceEnabled = TRUE;   
    }

    static public 
    function disableGlobalsTrace() {
        self::$globalTraceEnabled = FALSE;  
    }
    static public 
    function traceGlobalVariable( ) {
        foreach( self::$traceableGlobals as $aVarname ) {
            if ( ! isset( $GLOBALS[ $aVarname ] )) {
                continue;
            }
            if ( ! isset( self::$globalState[ $aVarname ] ) ) {
                self::$reportDelegate->emitVariableSetNew( $aVarname, $GLOBALS[ $aVarname ] );
                self::$globalState[ $aVarname ] = $GLOBALS[ $aVarname ];
                continue;
            }
           if ( self::$globalState[ $aVarname ] !== $GLOBALS[ $aVarname ]) {
             self::$reportDelegate->emitVariableChange( $aVarname, self::$globalState[ $aVarname ], $GLOBALS[ $aVarname ] );
           }
           self::$globalState[ $aVarname ] = $GLOBALS[ $aVarname ];
        }
    }
}