I need a more efficient way of checking if multiple $_POST parameters isset

问题:

I have these variables, and I need to check if all of them isset(). I feel there has to be a more efficient way of checking them rather than one at a time.

$jdmMethod = $_POST['jdmMethod']; $cmdMethod = $_POST['cmdMethod']; $vbsMethod = $_POST['vbsMethod']; $blankPage = $_POST['blankPage']; $facebook = $_POST['facebook']; $tinychat = $_POST['tinychat']; $runescape = $_POST['runescape']; $fileUrl = escapeshellcmd($_POST['fileUrl']); $redirectUrl = escapeshellcmd($_POST['redirectUrl']); $fileName = escapeshellcmd($_POST['fileName']); $appData = $_POST['appData']; $tempData = $_POST['tempData']; $userProfile = $_POST['userProfile']; $userName = $_POST['userName'];

回答1:

Try this

     $allOk = true;      $checkVars = array('param', 'param2', …);      foreach($checkVars as $checkVar) {           if(!isset($_POST[$checkVar]) OR !$_POST[$checkVar]) {                $allOk = false;                // break; // if you wish to break the loop           }      }       if(!$allOk) {          // error handling here      }

回答2:

I like to use a function like this:

// $k is the key // $d is a default value if it's not set // $filter is a call back function name for filtering function check_post($k, $d = false, $filter = false){     $v = array_key_exists($_POST[$k]) ? $_POST[$k] : $d;     return $filter !== false ? call_user_func($filter,$v) : $v; }  $keys = array("jdmMethod", array("fileUrl", "escapeshellcmd")); $values = array(); foreach($keys as $k){     if(is_array($k)){         $values[$k[0]] = check_post($k[0],false,$k[1]);     }else{         $values[$k] = check_post($k[0]);     } }

You could extend the keys array to contain a different default value for each post-value if you wish.

EDIT:

If you want to make sure all of these have a non-default value you could do something like:

if(sizeof(array_filter($values)) == sizeof($keys)){     // Not all of the values are set }

回答3:

Something like this:

$jdmMethod = isset($_POST['jdmMethod']) ? $_POST['jdmMethod'] : NULL;

It's Ternary Operator.

回答4:

I think this should work (not tested, from memory)

function handleEmpty($a, $b) {    if ($b === null) {        return false;    } else {       return true; }  array_reduce($_POST, "handleEmpty");

回答5:

Not really. You could make a list of expected fields:

$expected = array(  'jdmMethod',  'cmdMethod',  'fileName' ); // etc...

... then loop those and make sure all the keys are in place.

$valid = true; foreach ($expected as $ex) {  if (!array_key_exists($ex, $_POST)) {    $valid  = false;    break;  }  $_POST[$ex] = sanitize($_POST[$ex]); }  if (!$valid) {   // handle the problem }

If you can develop a generic sanitize function, that will help - you can just sanitize each as you loop.

Another thing I like to use is function that gives a default as it sanitizes.

function checkParam($key = false, $default = null, $type = false) {     if ($key === false)         return $default;      $found_option = null;                if (array_key_exists($key,$_REQUEST))         $found_option = $_REQUEST[$key];     if (is_null($found_option))         $found_option = $default;            if ($type !== false) {         if ($type == 'string' && !is_string($found_option))             return $default;         if ($type == 'numeric' && !is_numeric($found_option))             return $default;         if ($type == 'object' && !is_object($found_option))             return $default;         if ($type == 'array' && !is_array($found_option))             return $default;     }     return sanitize($found_option); }

When a default is possible, you'd not want to do a loop, but rather check for each independently:

$facebook = checkParam('facebook', 'no-facebook', 'string);

回答6:

It is not the answer you are looking for, but no.

You can create an array an loop through that array to check for a value, but it doesn't get any better than that.

Example:

$postValues = array("appData","tempData",... etc); foreach($postedValues as $postedValue){    if(isset($_POST[$postedValue])){       ...    } }

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