PHP strncmp() Function

Compare two strings (case-sensitive):

<?php
echo strncmp("Hello world!","Hello earth!",6);
?>

Definition and Usage

The strncmp() function compares two strings.

Note: The strncmp() is binary-safe and case-sensitive.

Tip: This function is similar to the strcmp() function, except that strcmp() does not have the length parameter.

strncmp(string1,string2,length)

Parameter	Description
string1	Required. Specifies the first string to compare
string2	Required. Specifies the second string to compare
length	Required. Specify the number of characters from each string to be used in the comparison

Return Value:	This function returns: 0 - if the two strings are equal <0 - if string1 is less than string2 >0 - if string1 is greater than string2
PHP Version:	4+

Compare two strings (case-sensitive = Hello and hELLo will not output the same):

<?php
echo strncmp("Hello","Hello",6);
echo "<br>";
echo strncmp("Hello","hELLo",6);
?>