PHP Manual: Case insensitive string comparisons using a "natural order" algorithm

Description

int strnatcasecmp(string $string1, string $string2)

This function implements a comparison algorithm that orders alphanumeric strings in the way a human being would. The behaviour of this function is similar to strnatcmp, except that the comparison is not case sensitive. For more information see: Martin Pool's » Natural Order String Comparison page.

Parameters

string1: The first string.
string2: The second string.

Return Values

Similar to other string comparison functions, this one returns -1 if string1 is less than string2 1 if string1 is greater than string2, and 0 if they are equal.

Changelog

Version	Description
8.2.0	This function now returns `-1` or `1`, where it previously returned a negative or positive number.

Examples

Example #1 strnatcasecmp example

<?php

var_dump(strnatcasecmp('Apple', 'Banana'));
var_dump(strnatcasecmp('Banana', 'Apple'));
var_dump(strnatcasecmp('apple', 'Apple'));
?>

The above example will output:

int(-1)
int(1)
int(0)

strnatcasecmp

Description

Parameters

Return Values

Changelog

Examples

See Also