PHP is_string() Function
❮ PHP Variable Handling Reference
Example
Check whether a variable is of type string or not:
<?php
$a = "Hello";
echo "a is " . is_string($a) . "<br>";
$b = 0;
echo "b is
" . is_string($b) . "<br>";
$c = 32;
echo "c is " . is_string($c) .
"<br>";
$d = "32";
echo "d is " . is_string($d) . "<br>";
$e =
true;
echo "e is " . is_string($e) . "<br>";
$f = "null";
echo "f
is " . is_string($f) . "<br>";
$g = "";
echo "g is " . is_string($g)
. "<br>";
?>
Try it Yourself »
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
