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run code in 150+ php & hhvm versions
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<?php $arr = array( "name" => "laruence", //如果这个值有可能是数组,或者字符串. ); if (isset($arr["name"]["foo"])) { echo "set"; }
Output for 5.0.0 - 5.0.2, 5.4.0 - 7.1.0
Output for 4.3.0 - 4.4.9, 5.0.3 - 5.3.29
set