PHP case-insensitive explode()

问题

I have the following code:

explode("delimiter", $snippet);

But I want that my delimiter is case-insensitive.

回答1:

Just use preg_split() and pass the flag i for case-insensitivity:

$keywords = preg_split("/your delimiter/i", $text);

Also make sure your delimiter which you pass to preg_split() doesn't cotain any sepcial regex characters. Otherwise make sure you escape them properly or use preg_quote().

回答2:

explode('delimiter',strtolower($snippet));

1. Never use expensive regular expressions when more CPU affordable functions are available.

2. Never use double-quotes unless you explicitly have a use for mixing variables inside of strings.

回答3:

You can first replace the delimiter and then use explode as normal. This can be done as a fairly readable one liner like this:

explode($delimiter,str_ireplace($delimiter,$delimiter,$snippet));

来源：https://stackoverflow.com/questions/12666489/php-case-insensitive-explode