PHP字符过滤函数去除字符串最后一个逗号(rtrim)

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我是靠谱客的博主兴奋睫毛，最近开发中收集的这篇文章主要介绍PHP字符过滤函数去除字符串最后一个逗号(rtrim)，觉得挺不错的，现在分享给大家，希望可以做个参考。

概述

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 = "\t\tThese are a few words :) ...  ";
$trimmed = rtrim($text);
// $trimmed = "\t\tThese are a few words :) ..."
$trimmed = rtrim($text, " \t.");
// $trimmed = "\t\tThese are a few words :)"
$clean = rtrim($binary, "\x00..\x1F");
// trim the ASCII control characters at the end of $binary 
// (from 0 to 31 inclusive)
?>