w3resource

PHP: is_string() function

Description

The is_string () function is used to find whether a variable is a string or not.

Version:

(PHP 4 and above)

Syntax:

is_string (var_name)

Parameter:

Name Description Required /
Optional
Type
var_name The variable being checked Required Mixed*

*Mixed : Mixed indicates that a parameter may accept multiple (but not necessarily all) types.

Return value

TRUE if var_name is of type string is, FALSE otherwise.

Value Type: Boolean.

Example:

<?php
if (is_string("2663"))
echo "It is a string\n";
else
echo 'It is not a string';
var_dump(is_string('XYZ'));
var_dump(is_string("99"));
var_dump(is_string(123.05));
var_dump(is_string(false));
?>

Output:

It is a string  bool(true)  bool(true)  bool(false)  bool(false) 

View the example in the browser

Practice here online :

See also

PHP Function Reference

Previous: is_scalar
Next: isset



PHP: Tips of the Day

Returns true if the given string is a palindrome, false otherwise

Example:

<?php
function tips_palindrome($string)
{
  return strrev($string) === (string) $string;
}

print(tips_palindrome('malayalam'));
print("\n");
print(tips_palindrome(151));

?>

Output:

1
1