Remove newlines (\n) from the right end of a string in PHP

Description

The following code shows how to remove newlines (\n) from the right end of a string.

Example

//  w ww . j av  a2 s  .  c o  m
<?php
   $str = "Hello World!\n\n";
   echo $str;
   echo chop($str);
?>

The code above generates the following result.