PERSONAL 520

SPIRITUAL 416

LDS 312

BOOK OF MORMON 237

SCRIPTURES 154

STUDIO-JOURNEY 129

RELIGION 112

LINUX 79

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LIFE 60

GENERAL CONFERENCE 46

GENTOO 39

MISCELLANEOUS 37

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MICROSOFT 23

FAMILY 23

AUDIO 21

I LOVE MY JOURNAL 18

FUN 15

CHILDREN 12

CURRENT EVENTS 10

NATURE'S WAY 10

VIDEO 9

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CONEXM 7

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PROVO CITY CENTER TEMPLE 6

FRIENDS 6

HEROD THE FINK 5

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DRUMS 4

HAND OF GOD 3

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STUDIO 3

THANKS4GIVING 2

CATS 2

MY JOURNAL 1

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EVERYDAY THOUGHTS 1

GOSPEL 1

PARENTING 1

YOUTH CONFERENCE 1

CHURCH NOTES 1

POLITICS 1

Whenever I do credit card checking, I always end up searching for longer than it would take me to create it myself, so...  without further ado, here's the Luhn, or "Mod 10" algorithm for validating credit card numbers.

function mod_10($cc) {
    $reversed_string = strrev($cc);
    $string_array = str_split($reversed_string);
    $i=1;
    foreach($string_array AS $character) {
        if($i % 2 == 0) {
            $doubled_array[] = $character * 2;
        } else $doubled_array[] = $character;
        $i++;
    }
    $doubled_string = implode("",$doubled_array);
    $doubled_array2 = str_split($doubled_string);
    $array_sum = array_sum($doubled_array2);
    if($array_sum % 10 == 0) {
        return TRUE;
    } else return FALSE;
}