Condition for null value in an array in php

Question

When I am displaying my array by using var_dump I get the following result:

 array(1) { [0]=> NULL }

I want to apply a condition that when my array has a null value it should do something. I have tried using array[0]== NULL and array[0]= NULL inside my condition but it does not work. Can anyone tell me what could be the correct condition for it?

if(is_null($array[0])) {}? By the way, == makes a comparison, = is an assignement (even in an if statement). — D4V1D
– D4V1D, Commented Sep 9, 2015 at 6:39

Criesto · Accepted Answer · 2015-09-09 06:49:16Z

5

PHPs empty() checks if a variable doesn't exist or has a falsey value (like array(), 0, null, false, etc).

<?php
if (!empty($array[0])) {
  echo "Not empty";
} else {
  echo "empty";
}
 ?>

or by using is_null

<?php
if(is_null($array[0])) {
  echo "empty";
} else {
  echo "not empty";
}
?>

or

<?php
if($array[0] === NULL) {
echo "empty";
} else {
echo "not empty";
}
?>

edited Sep 9, 2015 at 6:49

answered Sep 9, 2015 at 6:43

Criesto

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Comments

D4V1D · Accepted Answer · 2015-09-09 06:42:08Z

1

You can do it by several ways:

if(is_null($array[0])) {}

or

if(!isset($array[0])) {}

or

if($array[0] === null) {}

By the way, == makes a comparison, = is an assignment (even in an if statement) and === compares values and type.

answered Sep 9, 2015 at 6:42

D4V1D

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1 Comment

aldrin27 Over a year ago

Sorry, I thought you have error in syntax because of $ in Anik's answer. He just updated his answer. lol.

Bodipalli Prabhakar Rao · Accepted Answer · 2015-09-09 06:43:45Z

-1

$arr =  array();
if (!empty($arr)){
   //do your code
}
else {
  echo "Hey I'm empty";
}

answered Sep 9, 2015 at 6:43

Bodipalli Prabhakar Rao

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3 Comments

Sarah Mandana Over a year ago

This would tell if whole array is not empty or not. I don't need this.

Reeno Over a year ago

Please consider editing your post to add more explanation about what your code does and why it will solve the problem. An answer that mostly just contains code (even if it's working) usually won't help the OP to understand their problem.

Bodipalli Prabhakar Rao Over a year ago

Is this your are expecting Marium? $arr = array ( 0 => 5, 2 => NULL, 3 => 'prabha', 'k' => "NULL", 'l' => NULL, 'm' => 'money' ); foreach ($arr as $key => $val) { if ($val==NULL) { echo 'null is : ' . $key . ' => ' . $val . "<br>"; } else { echo $key . ' => ' . $val . "<br>"; } }

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