How to make html link with php regex

问题

My string

[[https://example.com|link]]

to convert

<a href="https://example.com>link</a>

My regex is

/\[{2}(.*?)\|(.*?)\]{2}/s

But it's not working.I am new to php regex.

回答1:

You may use

preg_replace('~\[\[((?:(?!\[\[).)*?)\|(.*?)]]~s', '<a href="$1">$2</a>', $string)

See the regex demo

Details

• \[\[ - a [[ substring
• ((?:(?!\[\[).)*?) - Group 1 ($1 in the replacement pattern refers to the value inside this group): any char (.), 0 or more occurrences but as few as possible (*?), that does not start a [[ char sequence ((?!\[\[))
• \| - a | char
• (.*?) - Group 2 ($2):
• ]] - a ]] substring.

See the PHP demo:

$string = "[[some_non-matching_text]] [[https://example.com|link]] [[this is not matching either]] [[http://example2.com|link2]]";
echo preg_replace('~\[\[((?:(?!\[\[).)*?)\|(.*?)]]~s', '<a href="$1">$2</a>', $string);
// => [[some_non-matching_text]] <a href="https://example.com">link</a> [[this is not matching either]] <a href="http://example2.com">link2</a>

来源：https://stackoverflow.com/questions/61071810/how-to-make-html-link-with-php-regex