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<?php $arr = [ 'foo', 'foo', 'bar', 'baz', 'baz' ]; $arrRes = []; $arrLower = []; foreach ($arr as $v) { $lower = mb_strtolower($v, 'utf-8'); foreach ($arrLower as $lower2) { if ($lower === $lower2) { continue 2; } } $arrRes[] = $v; $arrLower[] = $lower; } var_dump($arr2);
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 variable $arr2 in /in/1spDZ on line 25 NULL
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 variable $arr2 in /in/1spDZ on line 25 NULL
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 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 variable: arr2 in /in/1spDZ on line 25 NULL
Output for 7.3.32 - 7.3.33
NULL
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