I want to search a given text for local URLs in link's href attributes, using regular expression. Currently, I have this regular expression:
'/href=["\']?([^"\'>]+)["\']?/'
Now, I'd like to add some more filtering: Only get those links, which start like this:
XXXX-XX-XX
Where X is a number. This should match this: 2015-05-15/, 2015-05-15_03_21_32/ and also 2014-12-21 (any date set by me).
You can use the following regex:
href=["']?(\d{4}(?:[-_]\d{2})+)["']?
PHP: $re = "#href=[\"']?(\d{4}(?:[-_]\d{2})+)[\"']?#";
Explanation:
href=["']? - matches href= and an optional single or double quote(\d{4}(?:[-_]\d{2})+) - a capturing group around the href attribute value\d{4} - Exactly 4 digits(?:[-_]\d{2})+ - 1 or more groups of -/_ + 2-digit numbers["']? - matches an optional single or double quoteSee Regex demo here and IDEONE demo