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@ 2018-10-26T14:26:22Z

<?php

$x = NULL;

echo "print_r of x:\n";
print_r($x);

echo "\n\nis_null of x:\n";
print_r(is_null($x));

echo "\n\nisset of x:\n";
print_r(isset($x));

Output
Performance
VLD
References
Branches

print_r: documentation ( source)

preferences:dark modelive preview

28.63 ms | 402 KiB | 5 Q