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File: example_elements.class.php

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  Classes of Thiemo Mättig  >  TM::Apeform  >  example_elements.class.php  >  Download  
File: example_elements.class.php
Role: Class source
Content type: text/plain
Description: Extended class with special form elements
Class: TM::Apeform
A very abstract web form builder and processor
Author: By
Last change: Updated
Date: 5 years ago
Size: 6,167 bytes
 

Contents

Class file image Download
<?php

// Include the original TM::Apeform class to be extended.
require_once("Apeform.class.php");

/**
 * Extended TM::Apeform class providing some special form elements with build in
 * error checking.
 */
class ExtendedApeform extends Apeform
{
   
/**
     * Creates an ISO-date input field, e.g. "2003-12-31".
     *
     * @param label string
     * @param help string
     * @param defaultValue string
     * @return string
     */
   
function &date($label = "<u>D</u>ate", $help = "Year-Month-Day",
       
$defaultValue = "")
    {
       
// Use the actual date as defaultValue.
       
if (empty($defaultValue)) $defaultValue = date("Y-m-d");
       
// Calculate default element maxLength (and size too).
       
$maxLength = strlen($defaultValue);
       
// Call the parent method.
       
$date = &$this->text($label, $help, $defaultValue, $maxLength);
       
// Try to fetch three numbers from the string, the year first.
       
if (! preg_match('/(\d+)\D+(\d+)\D+(\d+)/s', $date, $m))
        {
           
$this->error("Please enter a date");
        }
        else
        {
           
// Extend years with missing century.
           
if ($m[1] <= 38) $m[1] += 2000;
            elseif (
$m[1] <= 99) $m[1] += 1900;
           
// Check validity, e.g. 2003-02-29 is forbidden.
           
if (! checkdate($m[2], $m[3], $m[1]))
            {
               
$this->error("Please enter a valid <u>d</u>ate");
            }
            else
            {
               
// Well-form the value.
               
$date = sprintf("%04s-%02s-%02s", $m[1], $m[2], $m[3]);
            }
        }
        return
$date;
    }

   
/**
     * Creates an ISO-date input field, e.g. "2003-12-31".
     *
     * @param label string
     * @param help string
     * @param defaultValue string
     * @return string
     */
   
function &dateSelector($label = "<u>D</u>ate", $help = "Year-Month-Day",
       
$defaultValue = "")
    {
        static
$count = 0;
       
$count++;
       
$name = "element" . count($this->_rows);
       
$help .= <<<CALENDAR
\t <a href="#" onclick="return calendar$count()">Calendar...</a>
<script type="text/javascript">
function calendar
$count()
{
  var c = '<html><head><title>Calendar</title></head><body>This is just an example<br><code>';
  for (i = 1; i <= 31; i++)
  {
    v = i <= 9 ? '0' + i : i;
    c += '<a href="#" onclick="e=opener.document.forms[\'form\'].elements[\'
$name\'];';
    c += 'e.value=e.value.substr(0,8)+\'' + v + '\';self.close();return false">' + v + '</a> ';
    if (i % 7 == 0) c += '<br>';
  }
  c += '</code></body></html>';
  var w = 250;
  var h = 130;
  var p = "";
  if (typeof event == "object" && typeof event.screenX == "number")
  {
    p = ",left=" + event.screenX + ",top=" + event.screenY;
  }
  var f = window.open("", "Calendar", "width=" + w + ",height=" + h + p + ",location=no,menubar=no,status=no,toolbar=no");
  f.document.open("text/html", "replace");
  f.document.write(c);
  f.document.close();
  f.focus();
  return false;
}
</script>
CALENDAR;
       
// Call the parent method.
       
return $this->date($label, $help, $defaultValue);
    }

   
/**
     * Creates an email input field, e.g. "name@domain.tld".
     *
     * @param label string
     * @param help string
     * @param defaultValue string
     * @param isRequired bool
     * @return string
     */
   
function &email($label = "<u>E</u>mail", $help = "", $defaultValue = "",
       
$isRequired = true)
    {
       
// Call the parent method.
       
$email = &$this->text($label, $help, $defaultValue);
        if (
$isRequired && ! $email)
        {
           
$this->error("Please enter your <u>e</u>mail adress");
        }
       
// Check for a single At sign, no spaces, top level domain and so on.
       
elseif ($email && ! preg_match(
           
'/^[^\s"\'<>()@,;:]+@[^\s"\'<>()@,;:]+\.[a-z]{2,6}$/is', $email))
        {
           
$this->error("Please enter a valid <u>e</u>mail adress");
        }
        return
$email;
    }

   
/**
     * Creates a price input field, e.g. "99.95".
     *
     * @param label string
     * @param help string
     * @param defaultValue float
     * @param min float
     * @param max float
     * @return string
     */
   
function &price($label = "<u>P</u>rice", $help = "\t Euro",
       
$defaultValue = "0.00", $min = 0.01, $max = 999999.99)
    {
       
// Calculate maximum string length.
       
$maxLength = max(strlen(sprintf("%.2f", $min)),
           
strlen(sprintf("%.2f", $max)));
       
// Call the parent method.
       
$price = &$this->text($label, $help, $defaultValue, $maxLength,
           
$maxLength);
       
// Remove any special character.
       
$price = preg_replace('/[^\d.-]+/s', '', $price);
       
// Check boundaries.
       
if ($price < $min)
        {
           
$this->error("Please enter a larger <u>p</u>rice");
        }
        elseif (
$price > $max)
        {
           
$this->error("Please enter a lower <u>p</u>rice");
        }
        else
        {
           
// Well-form the value.
           
$price = sprintf("%.2f", $price);
        }
        return
$price;
    }

   
/**
     * Creates an extended file upload field.
     *
     * @param label string
     * @param help string
     * @param allowedType string
     * @param maxKB int
     * @param isRequired bool
     * @return array
     */
   
function &filetype($label = "<u>F</u>ile", $help = "", $allowedType = "*/*",
       
$maxKB = 2048, $isRequired = false)
    {
       
// Call the parent method.
       
$file = &$this->file($label, $help);
       
$pattern = '{^' . str_replace("*", ".*", $allowedType) . '$}is';
        if (
$isRequired && ! $file)
        {
           
$this->error("Please select a file");
        }
        elseif (
$file && $allowedType && ! preg_match($pattern, $file['type']))
        {
           
$this->error("Please select a file of another type");
        }
        elseif (
$file && $maxKB && $file['size'] > $maxKB * 1024)
        {
           
$this->error("Please select a smaller file (max. " .
               
number_format($maxKB) . "KB)");
        }
        return
$file;
    }
}

?>