Is there any short hands for doing this logic?

Here is the code....

if(!(isset($_POST["email"]) && isset($_POST["sessionKey"]) && isset($_POST["page"]) && isset($_POST["ipp"]))){
        return;
}else{
   $email       = htmlspecialchars($_POST["email"]);           
   $sessionKey  = htmlspecialchars($_POST["sessionKey"]);           
   $page        = htmlspecialchars($_POST["page"]);           
   $ipp         = htmlspecialchar开发者_如何学编程s($_POST["ipp"]);           
}  

ok, the idea is I MUST assign the parameter with the same variables. For example, if I post a parameter "test" , I must assign this to a variable .... test... ...Is there any short cut for me to doing something like this? Thank you.

$data=array_map('htmlspecialchars',$_POST); 
extract($data);

Be careful with extract this can override your existing variables with same name but you can change this behaviour by passing additional parameter to extract function.

Have a look at:

http://php.net/manual/en//function.extract.php

Also, isset accepts more than one parameter, so you could use it like this:

if (isset($_POST["sessionKey"], $_POST["page"], $_POST["ipp"])) ...

See: http://www.php.net/manual/en/function.isset.php

Here's another possibility for the extraction part:

foreach (array('email','sessionKey','page','ipp') as $v) {
  $$v = htmlspecialchars($_POST[$v]);
}

To expand upon the extract answer, you can slice out only the $_POST entries that you need with:

$vars = array_intersect_key($_POST,
   array_flip(array("email", "sessionKey", "page", "ipp")));

// and then this replaces the isset() check and the extraction
if (count($vars) == 4) {
   extract(array_map("htmlspecialchars", $vars));
}