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<?php $a = 0; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset $a = ''; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset $a = false; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset $a = null; var_dump($a ?: 'a'); // empty var_dump($a ?? 'a'); // isset
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.20, 7.2.5 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
string(1) "a" int(0) string(1) "a" string(0) "" string(1) "a" bool(false) string(1) "a" string(1) "a"
Output for 5.5.0 - 5.5.37, 5.6.0 - 5.6.28
Parse error: syntax error, unexpected '?' in /in/X7RGp on line 6
Process exited with code 255.
preferences:
181.05 ms | 402 KiB | 220 Q