PHP Chop function

The chop function in PHP is used to remove the last character of a string. It is similar to the rtrim function, but chop is a deprecated function in PHP 7.4 and later versions. In this response, we will discuss the chop function in detail, including its syntax, parameters, and examples.

Syntax

string chop( string $string [, string $character_mask ] )

The string parameter is the string to be trimmed, and the optional character_mask parameter specifies which characters should be trimmed. If this parameter is not specified, the default character_mask is the whitespace characters: space, tab, newline, carriage return, vertical tab, and form feed.

Parameters

The chop function returns the trimmed string. If the input string is empty or consists of only whitespace characters, the function returns an empty string.

Examples

Here are some examples of how to use the chop function in PHP:

Example 1

$string = "Hello World! ";
echo chop($string); // Outputs: "Hello World!"

In this example, the chop function removes the whitespace character at the end of the string.

Example 2

$string = "Hello World!";
echo chop($string, "!"); // Outputs: "Hello World"

$string = “Hello World!”; echo chop($string, “!”); // Outputs: “Hello World”

Example 3 (Deprecated function)

$string = "Hello World! ";
echo chop($string); // Warning: chop() is deprecated since PHP 7.4, use rtrim() instead

In this example, we see that the chop function is deprecated since PHP 7.4 and should be replaced with the rtrim function.

In conclusion, the chop function in PHP is used to remove the last character of a string. It has a simple syntax and can take an optional parameter to specify which characters should be trimmed. However, it is a deprecated function in PHP 7.4 and later versions and should be replaced with the rtrim function.