how to check multiple $_POST variable for existence using isset()?

Question

I need to check if $_POST variables exist using single statement isset.

if (isset$_POST['name']  &&  isset$_POST['number']  &&  isset$_POST['address']  &&  etc ....)

is there any easy way to achieve this?

Answer 1

Use simple way with array_diff and array_keys

$check_array = array('key1', 'key2', 'key3');
if (!array_diff($check_array, array_keys($_POST)))
    echo 'all exists';

Answer 2

$variables = array('name', 'number', 'address');

foreach($variables as $variable_name){

   if(isset($_POST[$variable_name])){
      echo 'Variable: '.$variable_name.' is set<br/>';
   }else{
      echo 'Variable: '.$variable_name.' is NOT set<br/>';
   }

}

Or, Iterate through each $_POST key/pair

foreach($_POST as $key => $value){

   if(isset($value)){
      echo 'Variable: '.$key.' is set to '.$value.'<br/>';
   }else{
      echo 'Variable: '.$key.' is NOT set<br/>';
   }

}

The last way is probably your easiest way - if any of your $_POST variables change you don't need to update an array with the new names.

Answer 3

Do you need the condition to be met if any of them are set or all?

foreach ($_POST as $var){
    if (isset($var)) {

    }
}