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<?php class T{ public $a = 1; public $b = null; } $t = new T; var_dump(isset($t->a)); var_dump(isset($t->b)); var_dump(property_exists($t, a)); var_dump(property_exists($t, b));
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
bool(true) bool(false) Fatal error: Uncaught Error: Undefined constant "a" in /in/On79B:10 Stack trace: #0 {main} thrown in /in/On79B on line 10
Process exited with code 255.
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 bool(true) bool(false) Fatal error: Uncaught Error: Undefined constant "a" in /in/On79B:10 Stack trace: #0 {main} thrown in /in/On79B on line 10
Process exited with code 255.
Output for 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
bool(true) bool(false) Warning: Use of undefined constant a - assumed 'a' (this will throw an Error in a future version of PHP) in /in/On79B on line 10 bool(true) Warning: Use of undefined constant b - assumed 'b' (this will throw an Error in a future version of PHP) in /in/On79B on line 11 bool(true)
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33
bool(true) bool(false) Notice: Use of undefined constant a - assumed 'a' in /in/On79B on line 10 bool(true) Notice: Use of undefined constant b - assumed 'b' in /in/On79B on line 11 bool(true)
preferences:
216.52 ms | 402 KiB | 291 Q