PHP 5.x and PHP 7 closure different behavioral issues

　　The same piece of closure code, PHP 7 OK, PHP 5.5.11 (Windows development machine) on the error, think it is PHP 5 bug, the original usage is wrong, record a ~

　　The original code (the routing part of the framework that wrote itself) was originally written like this:

Full code Address: https://github.com/TF-Joynic/Hydrogen/blob/master/lib/Hydrogen/Route/Router.php

　　

1  Public functionAddRule (ruleinterface$routeRule, \closure$callback)2     {3         4         if(false!==$callbackClosure=$callback->bindto ($routeRule,$routeRule)) {5             $routeRule->setcallback ($callbackClosure);6}Else {7             Throw NewInvalidrulecallbackexception (' Invalid callback closure specified! ');8         }9 Ten         if(!$routeRule-isterminable ()) { One             Array_unshift($this->_rules,$routeRule); A}Else { -             $this->_rules[] =$routeRule; -         } the  -         returnSelf::$_instance; -}

It's no problem running under PHP 7.

But when the 5.5.11 is running, the 4th line is thrown Warning: Cannot bind an instance to a static closure

In the $callback Closure is actually:

　　

function $request $response) {}

　　

Preliminary judgment in the 5.5 environment PHP considers it a static function, while PHP 7 runs under the condition that it may be considered a normal function

Modify the code, in a static manner bind closure, PHP 5 will not error:

　

1  Public functionAddRule (ruleinterface$routeRule, \closure$callback)2     {3         //must bind as a static Closure, otherwise'll raise:Warning:Cannot bind an instance to a static Closure (v5.x) 4         if(false!==$callbackClosure= \closure::bind ($callback,NULL,$routeRule)) {5             $routeRule->setcallback ($callbackClosure);6         }7         /*if (false!== $callbackClosure = $callback->bindto ($routeRule, $routeRule)) {8 $routeRule->setcallback ($callbackClosure);9         }*/ Else {Ten             Throw NewInvalidrulecallbackexception (' Invalid callback closure specified! '); One         } A  -         if(!$routeRule-isterminable ()) { -             Array_unshift($this->_rules,$routeRule); the}Else { -             $this->_rules[] =$routeRule; -         } -  +         returnSelf::$_instance; -}

Specifically is not the above reasons for scrutiny ...

PHP 5.x and PHP 7 closure different behavioral issues