How to Remove Trailing Characters from PHP Strings?

Stripping Specific Terminal Characters from PHP Strings

When working with strings in PHP, you may occasionally encounter the need to remove specific characters from their end. One common scenario is to trim away trailing periods, which can be useful for standardizing string formats or validating user input.

Problem:

Suppose you have a string like "something here." and you want to remove the period at the end only if it exists.

Solution:

PHP provides the rtrim() function for removing characters from the right side of a string. To trim only a period, use the following code:

$output = rtrim($string, '.');

The rtrim() function takes two parameters: the string to be trimmed and the characters to remove. By specifying a period as the second parameter, you can selectively remove only the last period if it exists.

In the example above, rtrim() operates on the $string variable and removes the period if it is present. The modified string is then stored in $output. This results in the output value of "something here", with the period removed.

Note that if the string does not end with a period, the rtrim() operation will have no effect, and the string will remain unchanged. The reference from PHP.net provides additional details and examples on how to use the rtrim() function.

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