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<?php $text = "[[Some text]] and [[one more here]]"; echo preg_replace_callback("/\[\[(.+?)]]/", function($m) { return '<a href="/XLab/?document=' . str_replace(' ', '_', $m[1]) . '">' . $m[1] . '</a>'; }, $text);
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.31, 8.2.0 - 8.2.27, 8.3.0 - 8.3.16, 8.4.1 - 8.4.3
<a href="/XLab/?document=Some_text">Some text</a> and <a href="/XLab/?document=one_more_here">one more here</a>

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138.98 ms | 407 KiB | 5 Q