php man page for strcmp

STRCMP(3)								 1								 STRCMP(3)

strcmp - Binary safe string comparison

SYNOPSIS
       int strcmp (string  $str1, string  $str2)

DESCRIPTION
	Note that this comparison is case sensitive.

PARAMETERS
	      o $str1
		- The first string.

	      o $str2
		- The second string.

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

EXAMPLES
       Example #1

	      strcmp(3) example

	      <?php
	      $var1 = "Hello";
	      $var2 = "hello";
	      if (strcmp($var1, $var2) !== 0) {
		  echo '$var1 is not equal to $var2 in a case sensitive string comparison';
	      }
	      ?>

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

PHP Documentation Group 														 STRCMP(3)