php怎么去除右边的逗号

php去除右边的逗号的方法：首先创建一个PHP示例文件；然后通过“rtrim($str, ',');”方法删除字符串中右边的逗号即可。

本文操作环境：Windows7系统、PHP7.1版，DELL G3电脑

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

代码如下:

$str = '123,333,234,';
echo rtrim($str, ',');

rtrim实例代码2

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)
?>

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