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What will be the output of the following PHP code (8)?

39. What will be the output of the following PHP code?

<?php
$value1 = NULL;
$value2 = null;

var_dump($value1);
var_dump($value2);
?>  

1. Error
2. NULL undefined
3. NULL object
4. NULL NULL

Answer: D) NULL NULL

Explanation:

Both of the values "NULL" and "null" are NULL. Thus, the output will be "NULL NULL".