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<?php $arr = [ ['A', 1], 'B', ['C', 2], 'D', 'E', ['F', 3], ]; print json_encode(array_column($arr, null, 1), JSON_PRETTY_PRINT);
Output for 7.0.33, 7.1.33, 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 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
{ "1": [ "A", 1 ], "2": [ "C", 2 ], "3": [ "F", 3 ], "4": "E" }
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 { "1": [ "A", 1 ], "2": [ "C", 2 ], "3": [ "F", 3 ], "4": "E" }
Output for 5.5.38, 5.6.40
{ "1": [ "A", 1 ], "2": [ "C", 2 ], "3": [ "F", 3 ] }
preferences:
185.35 ms | 401 KiB | 161 Q