The below program is to right trim the string "w;h;" off string "h;" to get "w;". But unexpectedly what I got is "w", not "w;".
<?php
$string="w;h;";
$str="h;";
$nStr=rtrim($string,$str);
echo $nStr.'</br>';
?>
Use str_replace http://php.net/manual/en/function.str-replace.php
$string="w;h;";
$str="h;";
Echo str_replace($str, "", $string);
Str_replace replaces $str with nothing. Leaving w;
From the manual:
character_mask
Optionally, the stripped characters can also be specified using the character_mask parameter. Simply list all characters that you want to be stripped. With .. you can specify a range of characters.
If you do rtrim("w;h;", "h;") you're saying "trim either h or ; from the end of the string, meaning cut off characters that are either h or ; in this case it will cut off characters until it is only left with w.
If you want to remove a specific string from the end you have to do something like:
if (substr($string,-strlen($str)) == $str) {
$string = substr($string,0,-strlen($str));
}
Note: This assumes ASCII strings. For UTF-8 multibyte strings use mb_substr .