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<?php $val = [ ]; $ternary = $val['exists'] ?: 'no-tern'; $nullCo = $val['exists'] ?? : 'no-null'; var_dump($ternary, $nullCo);
Output for 5.5.24 - 5.5.30, 5.6.8 - 5.6.15
Parse error: syntax error, unexpected '?' in /in/0CPoO on line 7
Process exited with code 255.

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