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run code in 300+ PHP versions simultaneously
<?php $input = array('ANDREW','BRIAN','BOBBY','CRAIG','DAVID','DUNCAN','EDDIE','FRANK','GEOFF','GIANA','HAYLEY'); $array = range('A','Z'); $array = array_flip(array_filter(array_merge(array(0), $array))); $output = []; foreach($input as $k=>$v){ $output[] = $array[$v[0]].substr($v, 1); } print_r($output);
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 - 7.3.33, 7.4.0 - 7.4.33, 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 ( [0] => 1NDREW [1] => 2RIAN [2] => 2OBBY [3] => 3RAIG [4] => 4AVID [5] => 4UNCAN [6] => 5DDIE [7] => 6RANK [8] => 7EOFF [9] => 7IANA [10] => 8AYLEY )
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 ( [0] => 1NDREW [1] => 2RIAN [2] => 2OBBY [3] => 3RAIG [4] => 4AVID [5] => 4UNCAN [6] => 5DDIE [7] => 6RANK [8] => 7EOFF [9] => 7IANA [10] => 8AYLEY )

preferences:
166.65 ms | 402 KiB | 286 Q