PHP verifies whether the credit card number is correct. php verifies the credit card number _ PHP Tutorial

PHP verifies whether the credit card number is correct. php verifies the credit card number. PHP verifies whether the credit card number is correct. php verifies the credit card number using the following PHP function to verify whether a card number is a credit card: functionvalidateCard ($ cardnumber) {PHP verifies whether the credit card number is correct, php verification credit card number

You can use the following PHP function to verify whether a card number is a credit card:

function validateCard ( $cardnumber ) {    $cardnumber = preg_replace ( " /\D|\s/ " , "" , $cardnumber ) ; # strip any non-digits    $cardlength = strlen ( $cardnumber ) ;   if ( $cardlength != 0 )    {      $parity = $cardlength % 2 ;     $sum = 0 ;     for ( $i = 0 ; $i < $cardlength ; $i ++ )      {        $digit = $cardnumber [ $i ] ;       if ( $i % 2 == $parity ) $digit = $digit * 2 ;         if ( $digit > 9 ) $digit = $digit - 9 ;           $sum = $sum + $digit ;     }      $valid = ( $sum % 10 == 0 ) ;     return $valid ;   }    return false ;}

Secret can use the following PHP function to verify whether a card number is a credit card: function validateCard ($ cardnumber ){...