PHP is_scalar() Function

Example

Check whether a variable is a scalar or not:

<?php
$a = "Hello";
echo "a is " . is_scalar($a) . " ";

$b = 0;
echo "b is " . is_scalar($b) . " ";

$c = 32;
echo "c is " . is_scalar($c) . " ";

$d = NULL;
echo "d is " . is_scalar($d) . " ";

$e = array("red", "green", "blue");
echo "e is " . is_scalar($e) . " ";
?>

Try it Yourself »

Definition and Usage

The is_scalar() function checks whether a variable is a scalar or not.

This function returns true (1) if the variable is a scalar, otherwise it returns false/nothing.

Integers, floats, strings, or boolean can be scalar variables. Arrays, objects, and resources are not.

Syntax

is_scalar( variable);

Parameter Values

Parameter	Description
variable	Required. Specifies the variable to check

Technical Details

Return Value:	TRUE if variable is a scalar, FALSE otherwise
Return Type:	Boolean
PHP Version:	4.0.5+

❮ PHP Variable Handling Reference