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<?php $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);
Output for git.master, git.master_jit, rfc.property-hooks
[[some_non-matching_text]] <a href="https://example.com">link</a> [[this is not matching either]] <a href="http://example2.com">link2</a>

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