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<?php $html = 'This is a demo paragraph with a wrapped string ~here~, with another string ~~here~~.'; echo preg_replace_callback('/~~([\s\S]*?)~~(?!~)|~([^~]*)~/', function ($m) { return !empty($m[1]) ? '<span class="classTwo">' . $m[1] . '</span>' : '<span class="classOne">' . $m[2] . '</span>'; },$html);
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.34, 8.3.0 - 8.3.35, 8.4.1 - 8.4.26, 8.5.0 - 8.5.11
This is a demo paragraph with a wrapped string <span class="classOne">here</span>, with another string <span class="classTwo">here</span>.

preferences:
29.78 ms | 1137 KiB | 7 Q