在PHP中将字符串拆分为数组的最快方法

Question

I have a PHP script which splits strings into arrays using prey_split. The preg_split code is:

preg_split("~(?<!\*):~", $val);

Which essentially splits the string where there is a colon, without a preceding asterisk. For example: "h*:el:lo" turns into array("h*:el", "lo")

This process is quite resource intensive and slow when splitting large amounts of strings. Is there a faster method to achieve this?

Answer 1

Are you required to use preg_split()? Because it's easier to use preg_match_all():

preg_match_all('/(?:^|:)([^*:]+(?:\*.[^*:]+)*)/', $subject, $result, PREG_PATTERN_ORDER);
$result = $result[1];