Remove a part of a string, but only when it is at the end of the string

Question

I need to remove a substring of a string, but only when it is at the END of the string.

for example, removing \'string\' at the end of the following strings :

Answer 1

I suppose you could use a regular expression, which would match string and, then, end of string, coupled with the preg_replace() function.

Something like this should work just fine :

$str = "this is a test string";
$new_str = preg_replace('/string$/', '', $str);

Notes :

• string matches... well... string
• and $ means end of string

For more informations, you can read the Pattern Syntax section of the PHP manual.