PHP字符过滤函数去除字符串最后一个逗号(rtrim)

前端技术 2023/09/04 PHP

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)
?>

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