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run code in 150+ php & hhvm versions
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<?php echo serialize(array('url'=>'http://www.golem.de', 'target'=>'_blank'));
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
a:2:{s:3:"url";s:19:"http://www.golem.de";s:6:"target";s:6:"_blank";}