首先分别解释下,

trim过滤字符串两端,

rtrim过滤字符串尾部,=chop()

ltrim过滤字符串首部.

过滤字符串中键的咚咚就只能用str_replace咯.

举个例子说明下,

PHP代码

复制代码 代码如下:

$str = '123,333,234,';

echo rtrim($str, ',');

rtrim实例代码2

复制代码 代码如下:

<?php

$text = "ttThese are a few words :) ... ";

$trimmed = rtrim($text);

// $trimmed = "ttThese are a few words :) ..."

$trimmed = rtrim($text, " t.");

// $trimmed = "ttThese are a few words :)"

$clean = rtrim($binary, "x00..x1F");

// trim the ASCII control characters at the end of $binary

// (from 0 to 31 inclusive)

?>