php check empty or null in many variables

Question

Hello I have a simple script

This is my script, and try this script

 <?php 
        $user_id             = $_REQUEST['user_id'];
        $pid                 = $_REQUEST['pid'];
        $nopr                = $_REQUEST['nopr'];
        $tglpr               = $_REQUEST['tglpr'];
        $uraianpr            = $_REQUEST['uraianpr'];
        $jenispr             = $_REQUEST['jenispr'];
        $nilaipr             = $_REQUEST['nilaipr'];
        $costproject         = $_REQUEST['costproject'];
        $remarkpr            = $_REQUEST['remarkpr'];
        $tmpattachid         = $_REQUEST['tmpattachid'];

if ($user_id==NULL)
{
  $error "User Id Not Complete";
}
else if ($pid==NULL)
{
  $error= "PID Not Complete";
}
echo $error;
    ?>

I want if $user_id or other variables is empty/null

i confused when other variable have empty/null data i must typing code many if statement :(

example : 5 variables ($pid,$nopr,$tglpr,$jenispr,$costproject) is empty/null

this show error like this

 PID Not Complete
 NoPR Not Complete
 Tgl Pr Not Complete
 Jenis Pr Not Complete
 Cost Project Not Complete

Help Me, Thank's.

Answer 1

I won't give you the full answer, as stated in comments, this is a basic basic concept you need to learn, but I will show you the template.

You want to use a FOREACH loop to check each value in the array. See http://php.net/manual/en/control-structures.foreach.php

And Set it out like this:

foreach($_REQUEST as $key=>$row){
    if (is_null($row) || empty($row)){
     $errorText .= "You have no data in your ".$key."<br>";
     }
}
unset($key,$row);

Then you can output the $errorText value telling people which rows should be fixed. Easy.

Answer 2

Loop through the $_REQUEST and find the empty or null key.

CODE :

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

    if(trim($value) ==='' || is_null($value))
    {
        echo $key . " is not complete" . "<br/>";
    }

}