如果","后面有任何字符，请在<space>它们之间按

Question

我有一些字符串如下：

$str = "it is a test,it is a test";
$str = "it is a test ,it is a test";
$str = "it is a test, it is a test";
$str = "it is a test , it is a test";

现在我想要他们所有人都这样：

$str = "it is a test, it is a test";

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现在，我可以通过几个步骤做到这一点：

1. str_replace(" , ",",","$str");
2. str_replace(" ,",",","$str");
3. str_replace(", ",",","$str");
4. str_replace(",",", ","$str");

然后输出将是我想要的。现在我想知道，有没有REGEX代码可以一步到位？

Answer 1

您可以使用它并将其替换为,[space]

s*,s*

即：

preg_replace('/s*,s*/', ', ', $str);