/**
* validates a value and returns error string, or false if field is valid.
*
* @param string $value
* @param string $datatype
* @param int $min
* @param int $max
*/
static function validateValue($value, $datatype, $min, $max)
{
$invert_match = true;
$invalidated = false;
switch ($datatype) {
case "num":
$pattern = "/[^\\d]/";
break;
case "float":
$pattern = "/[^\\d\\.]/";
break;
case "date":
// two types: ymd, dmy
$pattern = "/([\\d]{4}-[\\d]{1,2}-[\\d]{1,2}|[\\d]{1,2}-[\\d]{1,2}-[\\d]{4})/";
$invert_match = false;
/* dates only HAVE certain ranges */
$max = 10;
if ($min > 0) {
$min = 8;
} else {
if (empty($value)) {
return true;
}
}
$a = explode("-", $value);
if (count($a) != 3) {
$invalidated = true;
break;
}
list($d1, $d2, $d3) = $a;
if (empty($d1) || empty($d2) || empty($d3)) {
$invalidated = true;
break;
}
if (strlen($d1) == 4) {
$y = $d1;
$m = $d2;
$d = $d3;
} else {
if (strlen($d3) == 4) {
if ($d2 < 12) {
$d = $d1;
$m = $d2;
$y = $d3;
} else {
$m = $d1;
$d = $d2;
$y = $d3;
}
} else {
$invalidated = true;
break;
}
}
if (!checkdate($m, $d, $y)) {
$invalidated = "Impossible date";
break;
}
break;
case "string":
$pattern = "/[^\\w\\s\\.\\/\\&\\+\\(\\)\\:,-@\\.]/";
break;
case "allstring":
$pattern = "/[^\\w\\s\\.\\/\\&\\+\\(\\)\\:\\!,-@\\.]/";
break;
case "email":
$pattern = '/^([.0-9a-z_-]+)@(([0-9a-z-]+\\.)+[0-9a-z]{2,4})$/i';
$invert_match = false;
break;
case "url":
$pattern = "/[^\\w\\.\\(\\)-]/";
break;
case "phone":
$pattern = "/[^\\d\\(\\)\\s\\+-]/";
break;
default:
$pattern = "/[^\\w\\s\\.,-]/";
}
/* validate field */
if (strlen($value) < $min) {
if ($min == 1) {
$invalidated = "Required field.";
} else {
$invalidated = "Needs to be at least {$min} characters, is " . strlen($value) . ".";
}
} else {
if (strlen($value) > $max) {
$invalidated = "May not exceed {$max} characters, is " . strlen($value) . ".";
} else {
if (preg_match($pattern, $value)) {
if ($invert_match) {
$invalidated = cForm::valexpl($datatype);
}
} else {
if (!$invert_match && strlen($value) > 0) {
$invalidated = cForm::valexpl($datatype);
}
}
}
}
if ($invalidated === true) {
$invalidated = "Invalid value.";
}
return $invalidated;
}
