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@ 2021-07-22T23:22:19Z

<?php

$string = '12jan';

var_export(
    preg_split(
        '~(\d+)~',
        $string,
        0,
        PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE 
    )
);

echo "\n---\n";

var_export(
    preg_split(
        '~(?:\d+|\D+)\K~',
        $string,
        0,
        PREG_SPLIT_NO_EMPTY
    )
);

Output
Performance
VLD
References
Branches

var_export: documentation ( source)
preg_split: documentation ( source)

preferences:dark modelive previewkey bindings

25.97 ms | 405 KiB | 5 Q