PHP string rtrim() Function

PHP rtrim() is predefined function which is used to remove whitespace or character form the right side of a string.

Syntax:

Parameter	Description	Required/Optional
string	Specify the string to check.	required
charlist	Specify character to remove Following character "\0" - NULL "\t" - tab "\n" - new line "\x0B" - vertical tab "\r" - carriage return " " - ordinary white space	Optional

Example 1

<?php
$str = "Hello PHP!    ";
echo "Without rtrim() function: " . $str;
echo "<br>";
echo "With rtrim() function:" . rtrim($str);
?>

Output:

Without rtrim() function: Hello PHP! 
With rtrim() function:Hello PHP!

Example 2

<?php
$str = "\n\n\nHello PHP!\n\n\n";
echo "Without trim() function: ". $str;
echo "<br>";
echo "With trim() function: ". trim($str);
?>

Output:

Without trim() function: Hello PHP! 
With trim() function: Hello PHP!

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