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@ 2020-10-20T12:53:00Z

<?php

echo preg_replace_callback(
         '/^.|.\K./',
         fn() => rand(0,9),
         '1234567'
     );

echo "\n---\n";

echo preg_replace_callback(
         '/.\K./',
         fn() => rand(0,9),
         '1234567'
     );

Output
Performance
VLD
References
Branches

preg_replace_callback: documentation ( source)
rand: documentation ( source)

preferences:dark modelive previewkey bindings

27 ms | 405 KiB | 5 Q