How to check if form fields contains a value (!empty) with PHP .

form-fields-second-revision

function checkFormFields($fields, $return) {

    $requiredFields = [];  //init required fields var
    $emptyFields = array();  //init empty fields var


  foreach ($fields as $field=>$fieldTag) //loop through the array to find the fields and field tags associated
{

    array_push($requiredFields, $field);  //push required field to the array

} //end of foreach loop

foreach($requiredFields as $requireField) {

     $currentField = $requireField; //store current field
     $currentFieldTag = $fields[$currentField]; //store current field tag

  if (!($_POST[$currentField]))
{
      array_push ($emptyFields, $currentFieldTag); //push the tag name to the empty field

} //end of if field is empty

} //end of check if field has a value

 /***
     * 
     * IF FIELD IS EMPTY BLOCK
     * 
 ***/

if (isset($emptyFields) && count($emptyFields) > 0) //check if there's an empty field in the variable
{ // then loop through

  foreach ($emptyFields as $emptyField)   {

/***
     * 
     *  CUSTOM USER ALERT ACTION GOES HERE 
     *
    ** */

    echo '
       <script>
        document.addEventListener(\'DOMContentLoaded\', function(){
       alert(\''.$emptyField.' is required!\');
        });
       </script>'; //ALERT THE USER 

} //END OF empty fields loop

} //end of check if there's an empty field

//if return is set to true
if($return == true) {
  if (isset($emptyFields) && count($emptyFields) > 0) {
        return(1);
}   else {
        return (0);
} 
}
} //end of function

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