Case insensitive string comparisons using a "natural order" algorithm

strlen
strnatcmp
String Functions
PHP Manual

# strnatcasecmp

(PHP 4, PHP 5)

strnatcasecmp — Case insensitive string comparisons using a "natural order" algorithm

### Description

int strnatcasecmp ( string `$str1` , string `$str2` )

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

`str1`

  The first string.

`str2`

  The second string.

### Return Values

Similar to other string comparison functions, this one returns < 0 if `str1` is less than `str2` > 0 if `str1` is greater than `str2`, and 0 if they are equal.

### See Also

- preg_match() - Perform a regular expression match
- strcmp() - Binary safe string comparison
- strcasecmp() - Binary safe case-insensitive string comparison
- substr() - Return part of a string
- stristr() - Case-insensitive strstr
- strncasecmp() - Binary safe case-insensitive string comparison of the first n characters
- strncmp() - Binary safe string comparison of the first n characters
- strstr() - Find first occurrence of a string
- setlocale() - Set locale information

strlen
strnatcmp
String Functions
PHP Manual