从字符串中提取数字和斜杠

Question

I have the following text string:

201408/ebrev_50000_20140804.pdf

I want to do an if-statement that checks if the string contains the date number and the slash: xxxxxx/ in the string. How can I solve this?

Answer 1

if (preg_match("@^\d+/@", $string))

^ is a zero-width anchor to the start of the string. \\d+ is one or more digits. / is a literal slash. You can use different PCRE delimiters so you don't have to escape the slash.

If you want to get the actual current date, you can use date("Ym") , which is four-digit year and two-digit month with leading zero. Then you wouldn't actually need to use PCRE because you have the literal string you need to match.

if (strpos(date("Ym") + "/", $string) === 0)