需要从数组中删除所有字母数字字符 [英] Need to remove all AlphaNumeric characters from an array

问题描述

我有一个这样的数组，我想去除所有字母字符。

I've an array like this ,i want to strip all alpha characters.

 $testString = Array ([0] => 46_xsdfdsa_ddasdasd [1] => 23423_wrwerwer_ajbfdahbfkahflagassl);
    echo preg_replace("/[^0-9,.]/", "", $testString);

输出应为46,23423。

Output should be 46,23423.

我在上面尝试，并没有工作。

I tried above and it did n't work.

感谢在前进

推荐答案

这应该工作：

echo preg_replace("/[a-zA-Z0-9]/", "", $testString);

仅供参考，字母数字表示字母+数字字符。从你的问题的标题，你似乎表明，要全部更换。让我们知道这对你的作品。

FYI, alphanumeric means alpha + numeric characters. From your question title, you seem to suggest that you want to replace them all. Let's know if this works for you.

如果在输出中，你只需要数字，，，这是你会做什么：

If in the output you only want numbers, ,., this is what you would do:

echo preg_replace("/[^\d,.]/", "", $testString);

示例：

$str = '23,423_.wrwerwer_ajbfdahbfkahflagassl';
echo preg_replace("/[^\d]/", "", $str); // result: 23,423.

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