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@ 2018-01-29T07:29:43Z

<?php

var_dump(
    ctype_digit('083322'), // -> valid
    ctype_digit('55403.22'), // -> invalid
    ctype_digit('1212133'), // -> valid
    ctype_digit('61,23311'), // -> invalid
    ctype_digit('890022'), // -> valid
    ctype_digit('09e22') // -> invalid
);

Output
Performance
VLD
References
Branches

var_dump: documentation ( source)
ctype_digit: documentation ( source)

preferences:dark modelive previewkey bindings

24.59 ms | 405 KiB | 5 Q