The **`rtrim()`** function removes the trailing space characters or other specified characters from the right side of a string. 

The following illustration shows a visual representation of the `rtrim()` function.

#      
## Syntax
```php
rtrim(string,charsToBeRemoved)
```
## Parameters
The `rtrim()` function takes two parameters:
- A string from which characters need to be removed.
- The list of characters to be removed from the right side of a string (optional).

>If the value of `charsToBeRemoved` is not specified, then the following characters are removed from the right side of a string:
>- " " - white space
>- "\t" - tab
>- "\n" - new line
>- "\x0B" - vertical tab
>- "\r" - carriage return
>- "\0" - NULL


## Return value
`rtrim()`returns the modified string. 

## Code
The example below demonstrates how to use `rtrim()` in PHP:



<?php
#single character removed from string
echo("rtrim('educative()','()'): ");
echo(rtrim('educative()','()'));
echo("\n");

echo("rtrim('educative!()','()'): ");
echo(rtrim('educative!()','()'));
echo("\n");

#multiple characters removed from string
echo("rtrim('educative!,()','! , ()'): ");
echo(rtrim('educative!,()','! , ()'));
echo("\n");

#default ~ without the list of characters to be removed
echo("rtrim('educative  '): ");
echo(rtrim('educative  '));
echo("\n");
?>	

What is rtrim() in PHP?

Removes trailing spaces or specified characters from right side of a string in PHP.