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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 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.4, 8.3.6
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
Output for 8.3.5
Warning: PHP Startup: Unable to load dynamic library 'sodium.so' (tried: /usr/lib/php/8.3.5/modules/sodium.so (libsodium.so.23: cannot open shared object file: No such file or directory), /usr/lib/php/8.3.5/modules/sodium.so.so (/usr/lib/php/8.3.5/modules/sodium.so.so: cannot open shared object file: No such file or directory)) in Unknown on line 0 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
Output for 7.0.0 - 7.0.33, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
b b a Notice: Undefined variable: c in /in/na1XN on line 14 a Notice: Array to string conversion in /in/na1XN on line 18 Array Notice: Array to string conversion in /in/na1XN on line 21 Array d d e Notice: Undefined index: c in /in/na1XN on line 33 e 1 g
Output for 7.3.32 - 7.3.33
b b a a Array Array d d e e 1 g
Output for 5.5.0 - 5.5.38, 5.6.0 - 5.6.38
Parse error: syntax error, unexpected '?' in /in/na1XN on line 5
Process exited with code 255.
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222.55 ms | 402 KiB | 293 Q