What is PHP artifice?

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Since the PHP play closed, everyone jump five floor, not laborious.


1. Foundation: A sentence implementation defines a function and immediately invokes
We often do that in JavaScript because variable pollution is an intolerable thing. But how does this function in PHP? One possible approach is to:

call_user_func(function(){        echo "hello,world";});

@ Chen, there is a solution to the ha.

   class A{    protected function Pro()    {        return "Pro";    }     Public function Pub()    {        return "Pub";    }}$a = New A();$ext = function () {    Var_dump($this);    //Var_dump ($this->pro ());//error:call to protected method A::p ro ()    Var_dump($this -Pub());};$ext = $ext -BindTo($a);Var_dump($ext());

   
    $b=3;switch(1){    case $b==3:        echo "fuck";        break;}?>

   function Callback($callback) {      $callback();  } $obj = (Object) "PHP aaa";  $callback = function ()  Use ($obj) {      Print "This is a closure with object, MSG is:{$obj -scalar}.
";  };  $obj -scalar = "php bbb";  //$obj = (object) "PHP bbb"; Callback($callback);

C language has a tendency to operator--&gt, and this PHP also has, did not say.

Add one: In the PHP source code can be directly input URL, no need to comment (black magic):

   
        http://www.zhihu.com?>

Artifice this How to say, play also can, but do not use in actual projects, contribute two bar:
Swap two values:
List ($b, $a) = Array ($a, $b);
$a = Array ($b, $b = $a) [0]; Of course, the Magic BOM head, do not know how many PHP beginners sleep well Quora list
What is some cool PHP tricks? XML string to Array

$xmlObj = simplexml_load_string($xmlStr);$xmlArr = json_decode(json_encode($xmlObj) , true);

1. StdClass ();

$obj = new stdClass;$obj->a = 1;$obj->b = 2;

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