WordPress Shortcode Regular Expression

A regular expression to match a WordPress shortcode, which is written inside two square brackets.

/^\[([a-z-_0-9]+)([^\[]+)*(?:\](.*)\[\/\1\]|\s+\/\])$/

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Matches:

• [wordpress][/wordpress]
• [wordpress parameter=”value”][/wordpress]

Non-matches:

• [wordpress]
• [Wordpress /]