Question

how to generate a unique Code which will be a 8 Digit code code 1-2 Represent fixed (ZX), Code 3-8 are auto generation of Code. Ex: “ZX23456X”. ?

The format of the unique Code should be as follows:
1) one alphabet.
2) followed by 5 numeric values
3) followed by first two should be fixed “ZX”

Answer 1

$start = 'ZX';
$characters = array_merge(range('A','Z'), range('0','9'));
for ($i = 0; $i < 6; $i++) {
    $rand = mt_rand(0, count($characters)-1);
    $start .= $characters[$rand];
}
echo $start;