PHP is_null() function
This function is used to check whether a variable is null or not.
Syntax
is_null(variable_name);
variable_name is the required parameter.
Example
<?php
$var1;
$var2 = 'Hello World';
if(is_null($var1)) {
echo 'Null Variable';
}
if(is_null($var2)){
echo 'Null Variable';
}
?>
Output -
Null VariableRelated PHP Functions
PHP array_reverse() functionPHP array_diff() function
PHP array_key_exists() function
PHP array_push() function
PHP array_search() function
PHP class_exists() function
PHP curl_setopt() function
PHP die() function
PHP dirname() function
PHP each() function
PHP explode() function
PHP file_exists() function
PHP function_exists() function
PHP getenv() function
PHP is_readable() function
PHP ksort() function
PHP mkdir() function
PHP ob_start() function
PHP parse_url() function
PHP str_repeat() function
PHP substr() function