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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";
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
b b a Warning: Undefined variable $c in /in/apAIb on line 14 a Warning: Array to string conversion in /in/apAIb on line 18 Array Warning: Array to string conversion in /in/apAIb on line 21 Array d d e Warning: Undefined array key "c" in /in/apAIb on line 33 e
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.0 - 7.2.33, 7.3.16 - 7.3.31, 7.4.0 - 7.4.33
b b a Notice: Undefined variable: c in /in/apAIb on line 14 a Notice: Array to string conversion in /in/apAIb on line 18 Array Notice: Array to string conversion in /in/apAIb on line 21 Array d d e Notice: Undefined index: c in /in/apAIb on line 33 e
Output for 7.3.32 - 7.3.33
b b a a Array Array d d e e
Output for 5.5.24 - 5.5.35, 5.6.8 - 5.6.21
Parse error: syntax error, unexpected '?' in /in/apAIb on line 5
Process exited with code 255.
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172.25 ms | 402 KiB | 182 Q