How to remove a character in php rtrim()

In PHP, the rtrim() function can remove blank characters or other predefined characters on the right side of a string. Just set the "rtrim (string to be checked, character to be deleted)" statement. Removes a specified character from a string.

The operating environment of this tutorial: windows7 system, PHP7.1 version, DELL G3 computer

php rtrim removes one character

<?php
header("Content-type:text/html;charset=utf-8");
$str = "Hello World!";
echo &#39;原字符串：&#39;.$str . "<br>";
echo &#39;删除字符串右侧的一个字符！后：&#39;.rtrim($str,"!");
?>

Output:

原字符串：Hello World!
删除字符串右侧的一个字符！后：Hello World

Description:

rtrim() function removes whitespace characters on the right side of the string or other predefined characters.

Syntax

rtrim(string,charlist)

Return value: Return the modified string.

Recommended learning: "PHP Video Tutorial"

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