3v4l.org

run code in 150+ php & hhvm versions
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<?php $url='script.php?a=0&page=0'; $url.='asdfad'; $i=2; echo preg_replace('/page=\d+/','page='.$i,$url); ?>
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
script.php?a=0&page=2asdfad