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<?php ini_set('display_errors', 1); ini_set('display_startup_errors', 1); error_reporting(-1); $x = 12; $y = &$x; $ar = ['a' => 1, 'b' => 2]; $ar['b'] = &$x; var_dump($ar);
Output for 7.0.0 - 7.0.20, 7.1.0 - 7.1.25, 7.2.0 - 7.2.33, 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
array(2) { ["a"]=> int(1) ["b"]=> &int(12) }
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 array(2) { ["a"]=> int(1) ["b"]=> &int(12) }

preferences:
156.14 ms | 402 KiB | 186 Q