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<?php $a = null; $b = null; $c = true; // $d is not defined var_dump( empty($a && $b), // true (no error) empty($b && $c), // true (no error) empty($b || $c), // false (no error) empty($d), // true (no error) empty($c && $d) // true (error) );
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
Warning: Undefined variable $d in /in/6flqu on line 13 bool(true) bool(true) bool(false) bool(true) bool(true)
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 Warning: Undefined variable $d in /in/6flqu on line 13 bool(true) bool(true) bool(false) bool(true) bool(true)
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.33, 7.3.0 - 7.3.31, 7.4.0 - 7.4.33
Notice: Undefined variable: d in /in/6flqu on line 13 bool(true) bool(true) bool(false) bool(true) bool(true)
Output for 7.3.32 - 7.3.33
bool(true) bool(true) bool(false) bool(true) bool(true)
preferences:
214.47 ms | 401 KiB | 287 Q