PHP is_string() Function

Example

Check whether a variable is of type string or not:

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

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

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

$d = "32";
echo "d is " . is_string($d) . " ";

$e = true;
echo "e is " . is_string($e) . " ";

$f = "null";
echo "f is " . is_string($f) . " ";

$g = "";
echo "g is " . is_string($g) . " ";
?>

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Definition and Usage

The is_string() function checks whether a variable is of type string or not.

This function returns true (1) if the variable is of type string, otherwise it returns false/nothing.

Syntax

is_string( variable);

Parameter Values

Parameter	Description
variable	Required. Specifies the variable to check

Technical Details

Return Value:	TRUE if variable is a string, FALSE otherwise
Return Type:	Boolean
PHP Version:	4.0+

❮ PHP Variable Handling Reference