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<?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 for git.master, git.master_jit, rfc.property-hooks
print_r of x: is_null of x: 1 isset of x:

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