PHP remove last character from string

In this article, you will learn how to remove the last character from a string using the PHP programming language.

This is a very common PHP interview question and is generally asked in programming interviews, 'how to remove the last character from a string in PHP'. Or, during the development process, you may come across a situation where you need to eliminate the last character from a string. This exercise shows you different ways to achieve the process from the given string. You can use any of the following methods to remove the last character from the string.

PHP remove last character from string using substr() function

This function is used to return a part of a string or substring from a string, starting from a given position.

substr(string,start,length)

The string is the required parameter. It should be a string datatype, start specifies where to start in the string and length is an optional parameter. If it is positive, the returned string contains the length of characters from the beginning, and if it is negative, the returned string contains the length of characters from the end of the string.

<?php 

$str1 = "Good Morning!";

echo "Original string: " . $str1 . "<br/>";
echo "Updated string: " . substr($str1, 0, -1) . "<br/>";
?>

Original string: Good Morning!
Updated string: Good Morning

PHP remove last character from string using mb_substr() function

It returns the part of the string. It performs a multi-byte safe substr() operation based on the number of characters. The position is counted from the beginning of the string.

mb_substr ( string $str , int $start [, int $length = NULL [, string $encoding = mb_internal_encoding() ]] )

Here, $str is the string to extract the substring from, $start specifies where to start in the string, and $length specifies the maximum number of characters to use from $str.

<?php 

$str1 = "Good Morning!";

echo "Original string: " . $str1 . "<br/>";
echo "Updated string: " . mb_substr($str1, 0, -1) . "<br/>";
?>

Original string: Good Morning!
Updated string: Good Morning

PHP remove last character from string using substr_replace() function

It is used to replace a part of a string with another string.

substr_replace($string,$replacement,$start,$length)

Here, $string is the string to extract, $replacement specifies the string to insert, $start specifies where to start replacing in the string, and $length specifies how many characters should be replaced.

<?php 

$str1 = "Good Afternoon";

echo "Original string: " . $str1 . "<br/>";
echo "Updated string: " . substr_replace($str1, "", -1) . "<br/>";
?>

Original string: Good Afternoon
Updated string: Good Afternoo

PHP remove last character from string using rtrim function

It is used to remove whitespace and other predefined characters from the right side of a string.

rtrim($string,$charlist);

Here, $string is the string to extract, and $charlist specifies which character to remove from the string.

<?php 

$str1 = "Have a nice day!";

echo "Original string: " . $str1 . "<br/>";
echo "Updated string: " . rtrim($str1, "!") . "<br/>";
?>

Original string: Have a nice day!
Updated string: Have a nice day

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