BG Tech Blog

function combinations($arrays, $i = 0) {
    if (!isset($arrays[$i])) {
        return array();
    }
    if ($i == count($arrays) - 1) {
        return $arrays[$i];
    }
 
    // get combinations from subsequent arrays
    $tmp = combinations($arrays, $i + 1);
 
    $result = array();
 
    // concat each array from tmp with each element from $arrays[$i]
    foreach ($arrays[$i] as $v) {
        foreach ($tmp as $t) {
            $result[] = is_array($t) ? 
                array_merge(array($v), $t) :
                array($v, $t);
        }
    }
 
    return $result;
}
 
print_r(
    combinations(
        array(
            array('A1','A2','A3'), 
            array('B1','B2','B3'), 
            array('C1','C2')
        )
    )
);

postcat -q MESSAGE_ID

 smtp_destination_rate_delay = 1s

find . -type d -exec echo mkdir -p {} \;

SELECT 
   COUNT(*) as cnt, SUBSTR(SUBSTR(Email, INSTR(Email, '@'), INSTR(Email, '.')), 2) as domain 
FROM 
   Users 
GROUP BY domain 
ORDER BY cnt DESC

smtp_helo_name = full.hostname.tld

postqueue -f

SET time_zone = 'Europe/London';

SQLSTATE[HY000]: General error: 1298 Unknown or incorrect time zone: "Europe/London"

mysql_tzinfo_to_sql /usr/share/zoneinfo | mysql -u root -p mysql

/**
 * If postcode is 5 characters, insert space after the 2nd character
 * If postcode is 6 characters, insert space after the 3rd character
 * If postcode is 7 characters, insert space after the 4th character
 * @param $postcode
 * @return string
 */
function formatUKPostcode($postcode)
{
    $postcode = strtoupper(preg_replace("/[^A-Za-z0-9]/", '', $postcode));
 
    if(strlen($postcode) == 5) {
        $postcode = substr($postcode,0,2).' '.substr($postcode,2,3);
    }
    elseif(strlen($postcode) == 6) {
        $postcode = substr($postcode,0,3).' '.substr($postcode,3,3);
    }
    elseif(strlen($postcode) == 7) {
        $postcode = substr($postcode,0,4).' '.substr($postcode,4,3);
    }
 
    return $postcode;
}

ls -lR /path/to/folder/ | grep ^l