(PHP 3>= 3.0.2, PHP 4 )

strcasecmp --  Binary safe case-insensitive string comparison


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.

Пример 1. strcasecmp() example

$var1 = "Hello";
$var2 = "hello";
if (!strcasecmp($var1, $var2)) {
    echo '$var1 is equal to $var2 in a case-insensitive string comparison';

See also ereg(), strcmp(), substr(), stristr(), strncasecmp(), and strstr().