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@ 2015-09-19T10:00:01Z

<?php
$nonexistent = '';
$value = $nonexistent ?? 'default';
$value2 = !empty($nonexistent) ? $nonexistent : 'default';
var_dump($value, $value2);

Output
Performance
VLD
References
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var_dump: documentation ( source)

preferences:dark modelive preview

53.71 ms | 402 KiB | 5 Q