php man page for strncasecmp

STRNCASECMP(3)								 1							    STRNCASECMP(3)

strncasecmp - Binary safe case-insensitive string comparison of the first n characters

SYNOPSIS
       int strncasecmp (string	$str1, string  $str2, int  $len)

DESCRIPTION
	This  function	is  similar  to strcasecmp(3), with the difference that you can specify the (upper limit of the) number of characters from
       each string to be used in the comparison.

PARAMETERS
	      o $str1
		- The first string.

	      o $str2
		- The second string.

	      o $len
		- The length of strings to be used in the comparison.

RETURN VALUES
	Returns < 0 if $str1 is less than $str2; > 0 if $str1 is greater than $str2, and 0 if they are equal.

SEE ALSO
       strncmp(3), preg_match(3), substr_compare(3), strcasecmp(3), stristr(3), substr(3).

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