Question

我的情况是在不同的班级中有类似的功能，让他们称呼他们＆＃34;执行＆＃34;和＆＃34;执行。＆＃34;

class oldVersion {
    public function Execute($x){
        echo 'This does the same thing as newVersion->execute(1)';
        echo 'but the class contains a lot of garbage that PHP7 doesn\'t like.';
        echo 'and the app dies if it\'s included';
    }
}

class newVersion {
    public function execute($x, $y = 0, $z = 0){
        if($y == 1){
            echo 'do thing one';
        } else {
            echo 'do thing zero';
        }
        return 'bar';
    }
}
$obj1 = new oldVersion();
$obj1->Execute('foo');

$obj2 = new newVersion();
$obj2->execute('bar', 1);

class oldVersion有很多错误，并且在PHP7下完全不起作用，所以我真正喜欢的是将Execute移动到newVersion并执行此操作：< / p>

class oldVersion_deprecated {
    // no longer included so PHP7 doesn't break
}

class newVersion {
    public function Execute($x){
        return $this->execute($x, 1);
    }
    public function execute($x, $y = 0, $z = 0){
        if($y == 1){
            echo 'do thing one';
        } else {
            echo 'do thing two';
        }
        return 'bar';
    }
}

$obj1 = new newVersion();
$obj1->Execute('foo');

$obj2 = new newVersion();
$obj2->execute('bar', 1);

但我自然会得到

FATAL ERROR: cannot redefine execute

是否有一种花哨的解决方法，或者我发现并重写了每次通话？

Answer 1

只需删除第一个调用＆＃34; real＆＃34;的执行函数。一。函数不区分大小写，因此您不必有两个

class newVersion {
 public function execute($x, $y = 0, $z = 0){
    if($y == 1){
        echo 'do thing one';
    } else {
        echo 'do thing two';
    }
    return 'bar';
   }
 }
 /* All the same */
 echo newv->Execute('foo');
 echo newv->ExEcUTe('foo');  
 echo newv->execute('bar', 1);

Answer 2

它有点乱，我通常不推荐它，但你可以使用PHP的“神奇”__call方法模拟区分大小写的方法。只要在给定的类中找不到方法，就会调用此方法。然后，您可以检查提供的方法名称，并运行适当的逻辑。

class Foo
{
    public function __call($name, $args)
    {
        switch ($name) {
            case 'Execute':
                return $this->oldExecute(...$args);
            case 'execute':
                return $this->newExecute(...$args);
        }
    }

    private function oldExecute($x)
    {
        echo 'Running old function with arg: ', $x, PHP_EOL;
    }

    private function newExecute($x, $y, $z)
    {
        echo 'Running new function with args: ', implode(',', [$x, $y, $z]), PHP_EOL;
    }
}

请参阅https://eval.in/926262

PHP：处理函数不区分大小写

2 个答案: