PHP 拆分为 preg_split() [英] PHP split to preg_split()

问题描述

我想把下面这个我一直在用的split函数转换成preg_split..有点混乱，因为值会不时变化...

I wanted to convert the following split function, which I have been using to preg_split.. it's a little confusing, because the value will change from time to time...

当前代码:

$root_dir = 'www';
$current_dir = 'D:/Projects/job.com/www/www/path/source';
$array = split('www', 'D:/Projects/job.com/www/www/path/source', 2);
print_r($array);

分割函数的输出:

Array ( [0] => D:/Projects/job.com/ [1] => /www/path/source )

推荐答案

preg_split() 类似于旧的 ereg-function split().您只需要将正则表达式括在 /.../ 中，如下所示:

preg_split() is similar to the old ereg-function split(). You only have to enclose the regex in /.../ like so:

preg_split('/www/', 'D:/Projects/job.com/www/www/path/source', 2);

这里的斜杠 / 实际上是正则表达式语法的一部分，不是在字符串中搜索的.如果 www 分隔符是可变的，您应该另外使用 preg_quote() 作为内部部分.

The enclosing slashes / here are really part of the regular expression syntax, not searched for in the string. If the www delimiter is variable, you should additionally use preg_quote() for the inner part.

但请注意，如果您只查找静态字符串，则不需要正则表达式.在这种情况下，您可以像以前使用 split() 一样使用 explode():

But note that you don't need regular expressions if you only look for static strings anyway. In such cases you can use explode() pretty much like you used split() before:

explode('www', 'D:/Projects/job.com/www/www/path/source', 2);

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