w3resource

PHP: strnatcmp() function

Description

The strnatcmp() function compare two strings using a "natural order" algorithm. This comparison is case sensitive.

Version:

(PHP 4 and above)

Syntax:

strnatcmp(string1, string2)

Parameters:

Name Description Required /
Optional
Type
string1 The first string. Required String
string2 The second string. Required String

Return value:

< 0 if string1<string2.
> 0 if string1>string2.
0 if string1=string2.

Value Type: Integer

Example:

<?php
echo strnatcmp('w3resource.com', 'W3RESOURCE.com');
?>

Output:

1 

View the example in the browser

See also

PHP Function Reference

Previous: strlen
Next: strncasecmp



PHP: Tips of the Day

In PHP, there are two versions of logical AND and OR operators.

Operator True if
$a and $b Both $a and $b are true
$a && $b Both $a and $b are true
$a or $b Either $a or $b is true
$a || $b Either $a or $b is true

Note that the && and || opererators have higher precedence than and and or. See table below:

Evaluation Result of $e Evaluated as
$e = false || true True $e = (false || true)
$e = false or true False ($e = false) or true

Because of this it's safer to use && and || instead of and and or.