Version: .5
Type: Class
Category: HTML
License: GNU General Public License
Description: This is a simple class for handling data from forms. At the moment, it only supports the input tag with the following attributes: “text” and “radio”. At the end of the file there is a short sample and description of how to use this class.
<?php
class FormHandling
{
var $formStructure;
var $strayFormVariables;
var $errorFormVariables = array();
var $passedFormVariables;
var $postData;
function FormHandling()
{
global $_POST;
$this->postData = $_POST;
}
function ParseFormData()
{
reset( $this->formStructure );
while( list( $key, $val ) = each( $this->formStructure ) )
{
switch( $val["type"] )
{
case "int":
$this->CheckInt( $key, $val );
break;
case "string":
$this->CheckString( $key, $val );
break;
case "radio":
$this->CheckRadio( $key, $val );
break;
default:
}
}
$this->StrayFormData();
}
function CheckInt( $formName, $variableStructure )
{
$this->postData["$formName"] += 0;
if( !( $variableStructure["canBeEmpty"] ) && empty( $this->postData["$formName"] ) )
{
$this->errorFormVariables[] = $formName;
return;
} else if( !is_int( $this->postData["$formName"] ) )
{
$this->errorFormVariables[] = $formName;
return;
}
$variableLength = strlen( $this->postData["$formName"] );
if( $variableLength < $variableStructure["minLength"] &&
$variableLength > $variableStructure["maxLength"] )
{
$this->errorFormVariables[] = $formName;
return;
} else
$this->passedFormVariables[] = $formName;
return;
}
function CheckString( $formName, $variableStructure )
{
if( !( $variableStructure["canBeEmpty"] ) && empty( $this->postData["$formName"] ) )
{
$this->errorFormVariables[] = $formName;
return;
} else if( !is_string( $this->postData["$formName"] ) )
{
$this->errorFormVariables[] = $formName;
return;
}
$variableLength = strlen( $this->postData["$formName"] );
if( $variableLength < $variableStructure["minLength"] &&
$variableLength > $variableStructure["maxLength"] )
{
$this->errorFormVariables[] = $formName;
return;
} else
$this->passedFormVariables[] = $formName;
return;
}
function CheckRadio( $formName, $variableStructure )
{
if( !( $variableStructure["canBeEmpty"] ) && empty( $this->postData["$formName"] ) )
{
$this->errorFormVariables[] = $formName;
return;
}
if( !in_array( $this->postData["$formName"], $variableStructure["possibleValues"] ) )
{
$this->errorFormVariables[] = $formName;
return;
}
$this->passedFormVariables[] = $formName;
return;
}
function StrayFormData()
{
reset( $this->postData );
while( list( $key, $val ) = each( $this->postData ) )
{
if( empty( $this->formStructure["$key"] ) )
$this->strayFormVariables[] = $key;
}
}
function DisplayStructure( $dataArray = '' )
{
if( $dataArray == '' )
$dataArray = $this->formStructure;
reset( $dataArray );
while( list( $key, $val ) = each( $dataArray ) )
{
echo $key;
if( is_array( $val ) )
{
echo "<br />";
$this->DisplayStructure( $val );
} else
echo " => ". $val ."<br />";
}
}
}
