Forms
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<?
/***********************************************************************************************************
* Author : Nick Geller *
* Description : user data type validation *
* Date : August 18, 2001 | version 1.3 revised *
* *
* *
* Fixes: *
* 1.1)email functionality added thanks to Henry.W *
* 1.2)also the alpha function has been modified to accept spaces *
* 1.3)global classArgArray now flushes previous data thanks to Vitaly.F *
* *
* *
* *
* This class expects 2 variables *
* 1. user defined data *
* 2. configuration string *
* returns false if the field passes all the validation test, passed in the configuration string *
* *
* *NOTE* this class returns false if passed field validates against the requered test *
* This was done to avoid the if(! syntax for usage *
* *
* expected format of the configuration string: *
* "ls||INT||gt||INT||eq||INT||match||STRING||has||CHAR||not||STRING||alpha||numeric||email" *
* any one of these or all are expected in the configuration string, but must follow the format!!! *
* *
* CLASS ABBRIVIATIONS : *
* *
* ls = cant be less than this number, requires a number *
* gt = cant be greater than this number, requires a number *
* eq = string size has to be equal to this number *
* match = string must match this string *
* has = string must contain this character *
* not = string can not match this string *
* alpha = all characters in a string must be alphabetical *
* numeric = all characters must be numneric *
* email = validates string to be of similar nature as an email address *
* *
**********************************************************************************************************/
CLASS validation
{
var $config_string; /* validation definition string */
var $field; /* user defined data type */
var $classArgArray; /* actions for the validation */
var $error; /* errors retured by the validate_field function */
function validate($configStr, $passedField)
{
$this->classArgArray = array();
$this->error = false;
$this->config_string = trim($configStr);
$this->field = trim($passedField);
$this->buildProperties();
$this->validate_field();
return $this->error;
}
function buildProperties()
{
$argumentsArray = explode("||", $this->config_string);
for($i=0; $i< sizeOf($argumentsArray); $i++)
{
if($argumentsArray[$i] == "ls" || $argumentsArray[$i] == "gt" || $argumentsArray[$i] == "eq")
{
if(eregi("^[0-9]+$", $argumentsArray[$i+1]))
{
$this->classArgArray[] = $argumentsArray[$i];
$this->classArgArray[] = $argumentsArray[$i+1];
}
}
else if($argumentsArray[$i] == "match" || $argumentsArray[$i] == "has" || $argumentsArray[$i] == "not")
{
if(isset($argumentsArray[$i+1]) && !$argumentsArray[$i+1] =="")
{
if($argumentsArray[$i+1] != "ls" || $argumentsArray[$i+1] != "gt"
|| $argumentsArray[$i+1] != "eq" || $argumentsArray[$i+1] != "match"
|| $argumentsArray[$i+1] != "has" || $argumentsArray[$i+1] != "alpha"
|| $argumentsArray[$i+1] != "numeric" || $argumentsArray[$i+1] != "not"
|| $argumentsArray[$i+1] != "email")
{
$this->classArgArray[] = $argumentsArray[$i];
$this->classArgArray[] = $argumentsArray[$i+1];
}
}
}
else if ($argumentsArray[$i] == "numeric" || $argumentsArray[$i] == "alpha" || $argumentsArray[$i] == "email")
{
$this->classArgArray[] = $argumentsArray[$i];
}
}
}
function validate_field()
{
$field_string_size = strlen($this->field); /* field string size */
for($j = 0; $j < sizeOf($this->classArgArray); $j++)
{
switch($this->classArgArray[$j])
{
case ls:
/* field is less than minimum required lenth */
if($field_string_size < $this->classArgArray[$j+1])
{
$this->error = true;
}
break;
case gt:
/* field is greater than maximum allowed lenth */
if($field_string_size > $this->classArgArray[$j+1])
{
$this->error = true;
}
break;
case eq:
/* field is does not equal to required lenth */
if($field_string_size != $this->classArgArray[$j+1])
{
$this->error = true;
}
break;
case match:
/* field does not match a required value */
if($this->field != $this->classArgArray[$j+1])
{
$this->error = true;
}
break;
case alpha:
/* only alphabetical characters are required for this field */
if(!eregi("^[a-zA-Z ]+$", $this->field))
{
$this->error = true;
}
break;
case numeric:
/* only numeric characters are required for this field*/
if(!eregi("^[0-9]+$", $this->field))
{
$this->error = true;
}
break;
case has:
/* field does not contain a required character */
if(!strstr($this->field, $this->classArgArray[$j+1]))
{
$this->error = true;
}
break;
case not:
/* fields value is not acceptable */
if(!$this->field == $this->classArgArray[$j+1])
{
$this->error = true;
}
break;
case email:
/* fields value is not acceptable */
if(!preg_match("/^s*[^@ rnt#$%;]+@[^@ rnt#$%;]+.w{2,3}s*$/", $this->field))
{
$this->error = true;
}
break;
}
}
}
}
?>
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Usage Example
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$v = new Validation();
if($v->validate("ls||2||gt||255||alpha", "your name")) { echo "Please correct your name."; }
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