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run code in 200+ php & hhvm versions
Bugs & Features
<?php var_dump(is_array(null)); var_dump(array_merge([1], null));
Output for 7.3.0
bool(false) Warning: array_merge(): Expected parameter 2 to be an array, null given in /in/nMpuc on line 3 NULL
Output for 5.4.0 - 5.6.38, 7.0.0 - 7.2.13
bool(false) Warning: array_merge(): Argument #2 is not an array in /in/nMpuc on line 3 NULL
Output for hhvm-3.22.0
bool(false) Warning: Invalid operand type was used: array_merge expects array(s) in /in/nMpuc on line -1 NULL
Output for hhvm-3.19.2 - 3.21.3
bool(false) Warning: Invalid operand type was used: array_merge expects array(s) in /in/nMpuc on line 3 NULL
Output for hhvm-3.10.1 - 3.18.5
bool(false) Warning: Invalid operand type was used: expects array(s) in /in/nMpuc on line 3 NULL
Output for 4.4.2 - 4.4.9, 5.1.0 - 5.3.29
Parse error: syntax error, unexpected '[', expecting ')' in /in/nMpuc on line 3
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.4.1, 5.0.0 - 5.0.5
Parse error: parse error, unexpected '[', expecting ')' in /in/nMpuc on line 3
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `')'' in /in/nMpuc on line 3
Process exited with code 255.