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@ 2014-06-26T21:17:28Z

<?php
if(isset($xxx)) {
 echo "isset ".var_dump($xxx); 
}
else {
 echo "notset ".var_dump($xxx);
}
?>

Output
Performance
VLD
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var_dump: documentation ( source)

preferences:dark modelive preview

47.56 ms | 402 KiB | 5 Q