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<?php declare(strict_types=1); $a = [1.0 => 'a']; var_dump($a); var_dump(array_key_exists(1.0, $a));
Output for 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.4, 8.3.6 - 8.3.7
array(1) { [1]=> string(1) "a" } 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 array(1) { [1]=> string(1) "a" } bool(true)
Output for 7.3.0 - 7.3.33, 7.4.0 - 7.4.33
array(1) { [1]=> string(1) "a" } Warning: array_key_exists(): The first argument should be either a string or an integer in /in/HDWRu on line 7 bool(false)

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114.91 ms | 402 KiB | 158 Q