PHP Program to Remove Last Character from the String

Given a String, the task is to remove the last character from a string in PHP. This operation is common in text processing and manipulation.

Examples:

Input: str = "Hello Geeks!"
Output: Hello Geeks

Input: str = "Welcome"
Output: Welcom

These are the following approaches:

Approach 1: Using substr() Function

The substr() function in PHP can be used to return a part of a string. By specifying the start and length parameters, we can effectively remove the last character. The substr() function is used with the start parameter as 0 (beginning of the string) and the length parameter as -1 (which indicates one character less from the end). This effectively returns the string without the last character.

Example: This example shows the removal of last character from the given string by the use of the substr() function.

<?php

function removeLastChars($string) {
    return substr($string, 0, -1);
}

// Driver Code
$str = "Hello Geeks!";

echo "Modified String: " . removeLastChars($str);

?>

Modified String: Hello Geeks

Approach 2: Using rtrim() Function

The rtrim() function is another way to remove the last character from a string, especially if the character is a known whitespace or other specific character. The rtrim() function is used with the character to be trimmed specified as the second argument. This approach is useful when you specifically want to remove a known character from the end of the string.

Example: This example shows the removal of last character from the given string by the use of the rtrim() function.

<?php

function removeLastChars($string) {
    return rtrim($string, "!");
}

// Driver Code
$str = "Hello Geeks!";

echo "Modified String: " . removeLastChars($str);

?>

Modified String: Hello Geeks

Approach 3: Using String Manipulation

You can also use basic string manipulation to remove the last character. The substr_replace() function is used with the start parameter as -1 and the replacement string as an empty string. This effectively replaces the last character with an empty string, removing it.

Example: This example shows the removal of last character from the given string by using string manipulation.

<?php

function removeLastChars($string) {
    return substr_replace($string, "", -1);
}

// Driver Code
$str = "Hello Geeks!";

echo "Modified String: " . removeLastChars($str);

?>

Modified String: Hello Geeks