3v4l.org

run code in 200+ php & hhvm versions
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<?php echo urldecode(htmlentities('9mZvo%2Bzjyg7sLoVfcq466qBvPAg%3D'));
Output for 4.3.0 - 7.2.0
9mZvo+zjyg7sLoVfcq466qBvPAg=