How to remove the first and last characters of a string in php?

There are three functions in PHP that can remove the first and last characters of a string: The

trim() function removes blank characters or other predefined characters on both sides of the string.

ltrim() - Removes whitespace characters or other predefined characters on the left side of a string.

rtrim() - Removes whitespace characters or other predefined characters on the right side of the string.

Example:

Remove the characters on the left side of the string ("He" in "Hello" and "d!" in "World"):

<?php
$str = "Hello World!";
echo $str . "<br>";
echo trim($str,"Hed!");
?>

Remove the characters on the right side of the string:

<?php
$str = "Hello World!";
echo $str . "<br>";
echo rtrim($str,"World!");
?>

Remove the characters on the left side of the string:

<?php
$str = "Hello World!";
echo $str . "<br>";
echo ltrim($str,"Hello");
?>

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