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<?php $test = NULL; $test2 = array(); echo empty($test2) ? 'yes1' : 'no1'; $test3 = serialize($test2); echo $test3.PHP_EOL; echo empty(unserialize($test)) ? 'Yes'.PHP_EOL : 'No'.PHP_EOL;
Output for 8.1.0 - 8.1.27, 8.2.0 - 8.2.17, 8.3.0 - 8.3.4
yes1a:0:{} Deprecated: unserialize(): Passing null to parameter #1 ($data) of type string is deprecated in /in/VpRhE on line 12 Yes
Output for 5.5.24 - 5.5.35, 5.6.7 - 5.6.28, 7.0.0 - 7.0.20, 7.1.0 - 7.1.10, 7.2.0 - 7.2.33, 7.3.16 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30
yes1a:0:{} Yes
Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45
Fatal error: Can't use function return value in write context in /in/VpRhE on line 12
Process exited with code 255.
Output for 4.4.2 - 4.4.9
Parse error: syntax error, unexpected T_STRING, expecting T_VARIABLE or '$' in /in/VpRhE on line 12
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1
Parse error: parse error, unexpected T_STRING, expecting T_VARIABLE or '$' in /in/VpRhE on line 12
Process exited with code 255.
Output for 4.3.2 - 4.3.4
Parse error: parse error, expecting `T_VARIABLE' or `'$'' in /in/VpRhE on line 12
Process exited with code 255.

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