eregi
    (PHP 3, PHP 4 )
eregi -- case insensitive regular expression match
Description
bool 
eregi ( string pattern, string string [, array regs])
     This function is identical to ereg() except
     that this ignores case distinction when matching alphabetic
     characters.
    
     
Example 1. eregi() example <?php
if (eregi("z", $string)) {
    echo "'$string' contains a 'z' or 'Z'!";
}
?> |  
  | 
    
     See also ereg(), ereg_replace(),
     eregi_replace(), stripos(), and
     stristr().