PHP is_null() function

In this chapter you will learn:

1. Description for PHP is_null() function
2. Syntax for PHP is_null() function
3. Parameter for PHP is_null() function
4. Return value for PHP is_null() function
5. Example - Is it NULL.

Description

is_null(value) returns true if value is null.

Syntax

PHP is_null() function has the following syntax.

Parameter

• value is the variable being type checked.

Return

PHP is_null() function returns true if value is null.

Example

Is it NULL.

<?php
var_dump(is_null($value));

?>

The code above generates the following result.

Next chapter...

What you will learn in the next chapter:

1. Description for PHP is_numeric() function
2. Syntax for PHP is_numeric() function
3. Parameter for PHP is_numeric() function
4. Return value for PHP is_numeric() function
5. Example - Is it a numeric value

PHP boolval() function

PHP floatval() function

PHP gettype() function

PHP intval() function

PHP is_array(value) function

PHP is_bool() function

PHP is_float() function

PHP is_int() function

PHP is_null() function

PHP is_numeric() function

PHP is_object() function

PHP is_resource() function

PHP is_string() function

PHP isset() function

PHP settype() function

PHP strval() function