strcasecmp
    (PHP 3>= 3.0.2, PHP 4 )
strcasecmp --       Binary safe case-insensitive string comparison     
Description
int 
strcasecmp ( string str1, string str2)
     Returns < 0 if str1 is less than      str2; > 0 if str1      is greater than str2, and 0 if they are      equal.      
| Example 1. strcasecmp() example | <?php
$var1 = "Hello";
$var2 = "hello";
if (strcasecmp($var1, $var2) == 0) {
    echo '$var1 is equal to $var2 in a case-insensitive string comparison';
}
 ?> | 
 | 
     
     See also ereg(), strcmp(),      substr(), stristr(),      strncasecmp(), and      strstr().