PHP提取字符串的一部分

Question

I know there's a lot of questions about this but it seems there's no simple way to do what I want. Take the following strings as an example:

expires  Friday, December 21, 2012 @ 11:59pm ET
expires  Saturday, December 22, 2012 @ 9:59pm ET

Both strings are similar but the following code is inconsistent:

echo substr($string, 14, 27);

as it outputs the following:

Friday, December 21, 2012 @
Saturday, December 21, 2012

Clearly, I don't want to keep the @ symbol. Is there a way to simply keep the date while removing "expires " and " @ ##:##pm ET"?

Answer 1

preg_replace('/expires\s*(.*?)@/', '\1', $string);

You also don't really need to use a regex, but I would since it looks simpler. Here is a non-regex solution:

//I took 14 from you, but it seems to be 9
substr($string, 14, strpos($string, '@') - strlen($string));