php如何去掉字符串最后一个逗号

php去掉字符串最后一个逗号的方法：使用函数rtrim过滤字符串尾部，代码为【$trimmed = "\\\\t\\\\tThese are a few words 🙂 .."$str = '13,3';echo rtrim($str, ',')】。

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php去掉字符串最后一个逗号的方法：

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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