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run code in 150+ php & hhvm versions
Bugs & Features
<?php $array = array(0 => 200, '730404' => 89730 ,'730205' => 1000 ,'730100' => 1000 ,'730601' => 2184); $keys = array_keys($array, '730205'); print_r($keys[0]); ?>
Output for 5.3.0 - 5.6.28, 7.0.0 - 7.1.0
Notice: Undefined offset: 0 in /in/5Ht2Z on line 5
Output for hhvm-3.10.0 - 3.12.0
Notice: Undefined index: 0 in /in/5Ht2Z on line 5
Output for 4.3.0 - 5.2.17
Notice: Undefined offset: 0 in /in/5Ht2Z on line 5