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<?php $arr = [ 'q' => 'qwe' ]; var_dump(key_exists($arr['z']) && $arr['z'] === 'qwe');
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 array key "z" in /in/TobmC on line 7 Fatal error: Uncaught ArgumentCountError: key_exists() expects exactly 2 arguments, 1 given in /in/TobmC:7 Stack trace: #0 /in/TobmC(7): key_exists(NULL) #1 {main} thrown in /in/TobmC on line 7
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 Warning: Undefined array key "z" in /in/TobmC on line 7 Fatal error: Uncaught ArgumentCountError: key_exists() expects exactly 2 arguments, 1 given in /in/TobmC:7 Stack trace: #0 /in/TobmC(7): key_exists(NULL) #1 {main} thrown in /in/TobmC on line 7
Process exited with code 255.
Output for 5.6.38, 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 index: z in /in/TobmC on line 7 Warning: key_exists() expects exactly 2 parameters, 1 given in /in/TobmC on line 7 bool(false)
Output for 7.3.32 - 7.3.33
Warning: key_exists() expects exactly 2 parameters, 1 given in /in/TobmC on line 7 bool(false)

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