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<?php $a = null; print $a ?? 'b'; print "\n"; print $a ?: 'b'; print "\n"; print $c ?? 'a'; print "\n"; print $c ?: 'a'; print "\n"; $b = array('a' => null); print $b ?? 'c'; print "\n"; print $b ?: 'c'; print "\n"; print $b['a'] ?? 'd'; print "\n"; print $b['a'] ?: 'd'; print "\n"; print $b['c'] ?? 'e'; print "\n"; print $b['c'] ?: 'e'; print "\n"; print true ?? 'f'; print "\n"; print false ?: 'g'; print "\n";
Output for git.master, git.master_jit, rfc.property-hooks
b b a Warning: Undefined variable $c in /in/na1XN on line 14 a Warning: Array to string conversion in /in/na1XN on line 18 Array Warning: Array to string conversion in /in/na1XN on line 21 Array d d e Warning: Undefined array key "c" in /in/na1XN on line 33 e 1 g

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