Parameter	Description
string	Required. Specifies the string to check
charlist	Optional. Specifies which characters to remove from the string. If omitted, all of the following characters are removed: "\0" - NULL "\t" - tab "\n" - new line "\x0B" - vertical tab "\r" - carriage return " " - ordinary white space

Example 1

<html>
<body>
<?php
$str = "Hello World! ";
echo "Without rtrim: " . $str;
echo "<br />";
echo "With rtrim: " . rtrim($str);
?>
<body>
<html>

The browser output of the code above will be:

Without rtrim: Hello World!
With rtrim: Hello World!

If you select "View source" in the browser window, you will see the following HTML:

<html>
<body>
Without rtrim: Hello World! <br />With rtrim: Hello World!
</body>
</html>

Example 2

<?php
$str = "Hello World!\r\n";
echo "Without rtrim: " . $str;
echo "<br />";
echo "With rtrim: " . rtrim($str);
?>

The browser output of the code above will be:

Without rtrim: Hello World!
With rtrim: Hello World!

If you select "View source" in the browser window, you will see the following HTML:

<html>
<body>
Without rtrim: Hello World!
<br />With rtrim: Hello World!
</body>
</html>

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