?php 
$str = "Hello World!"; 
echo $str . "br>"; 
echo chop($str,"World!"); 
?>

chop( _string,charlist_ )

?php 
$str = "Hello World!\n\n"; 
echo $str; 
echo chop($str); 
?>

!DOCTYPE html> 
html> 
body> 
Hello World! 
Hello World! 
/body> 
/html>