jquery开发的form编辑器

<?php /** * @package jquery.Formbuilder * @author Michael Botsko * @copyright 2009 Trellis Development, LLC * * This PHP object is the server-side component of the jquery formbuilder * plugin. The Formbuilder allows you to provide users with a way of * creating a formand saving that structure to the database. * * Using this class you can easily prepare the structure for storage, * rendering the xml file needed for the builder, or render the html of the form. * * This package is licensed using the Mozilla Public License 1.1 * * We encourage comments and suggestion to be sent to mbotsko@trellisdev.com. * Please feel free to file issues at http://github.com/botskonet/jquery.formbuilder/issues * Please feel free to fork the project and provide patches back. */ // Uncomment these for debug //error_reporting(E_ALL); //ini_set('display_errors', true); /** * @abstract This class is the server-side component that handles interaction with * the jquery formbuilder plugin. * @package jquery.Formbuilder */ class Formbuilder { /** * @var array Contains the form_hash and serialized form_structure from an external source (db) * @access protected */ protected $_container; /** * @var array Holds the form source in raw array form * @access protected */ protected $_structure; /** * @var array Holds the form source in serialized form * @access protected */ protected $_structure_ser; /** * @var array Holds the hash of the serialized form * @access protected */ protected $_hash; /** * Constructor, loads either a pre-serialized form structure or an incoming POST form * @param array $containing_form_array * @access public */ public function __construct($form = false){ $form = is_array($form) ? $form : array(); // Set the serialized structure if it's provided // otherwise, store the source if(array_key_exists('form_structure', $form)){ $this->_container = $form; // set the form as the container $this->_structure_ser = $form['form_structure']; // pull the serialized form $this->_hash = $this->hash(); // hash the current structure $this->_structure = $this->retrieve(); // unserialize the form as the raw structure } else { $this->_structure = $form; // since the form is from POST, set it as the raw array $this->_structure_ser = $this->store(); // serialize it $this->rebuild_container(); // rebuild a new container } return true; } /** * Wipes and re-saves the structure and hash to the containing array. * * @access protected * @return boolean */ protected function rebuild_container(){ $this->_container = array(); $this->_container['form_hash'] = $this->_hash; $this->_container['form_structure'] = $this->_structure_ser; return true; } /** * Takes an array containing the form admin information * and serializes it for storage in the database. Provides a hash * that can will be used later during rendering. * * The array provided is typically from $_POST generated by the jquery * plugin. * * @access public * @return array */ public function store(){ $this->_structure_ser = serialize($this->_structure); $this->_hash = $this->hash($this->_structure_ser); return array('form_structure'=>$this->_structure_ser,'form_hash'=>$this->_hash); } /** * Creates a hash that's used to check the contents * have not changed from what was saved. * * @access public * @return string */ public function hash(){ return sha1($this->_structure_ser); } /** * Returns a serialized form back into it's original array, for use * with rendering. * * @param string $form_array * @access public * @return boolean */ public function retrieve(){ if(is_array($this->_container) && array_key_exists('form_hash', $this->_container)){ if($this->_container['form_hash'] == $this->hash($this->_container['form_structure'])){ return unserialize($this->_container['form_structure']); } } return false; } /** * Prints out the generated xml file with a content-type of text/xml * * @access public * @uses generate_xml */ public function render_xml(){ header("Content-Type: text/xml"); print $this->generate_xml(); } /** * Builds an xml structure that the jquery plugin will parse for form admin * structure. Right now we're just building the xml the old fashioned way * so that we're not dependant on DOMDocument or something. * * @access public */ public function generate_xml(){ // begin forming the xml $xml = '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>'."\n"; $xml .= '<form>'."\n"; if(is_array($this->_structure)){ foreach($this->_structure as $field){ // input type="text" if($field['class'] == "input_text"){ $xml .= sprintf('<field type="input_text" required="%s">%s</field>'."\n", $field['required'], $this->encode_for_xml($field['values'])); } // textarea if($field['class'] == "textarea"){ $xml .= sprintf('<field type="textarea" required="%s">%s</field>'."\n", $field['required'], $this->encode_for_xml($field['values'])); } // input type="checkbox" if($field['class'] == "checkbox"){ $xml .= sprintf('<field type="checkbox" required="%s" title="%s">'."\n", $field['required'], (isset($field['title']) ? $this->encode_for_xml($field['title']) : '')); if(is_array($field['values'])){ foreach($field['values'] as $input){ $xml .= sprintf('<checkbox checked="%s">%s</checkbox>'."\n", $input['default'], $this->encode_for_xml($input['value'])); } } $xml .= '</field>'."\n"; } // input type="radio" if($field['class'] == "radio"){ $xml .= sprintf('<field type="radio" required="%s" title="%s">'."\n", $field['required'], (isset($field['title']) ? $this->encode_for_xml($field['title']) : '')); if(is_array($field['values'])){ foreach($field['values'] as $input){ $xml .= sprintf('<radio checked="%s">%s</radio>'."\n", $input['default'], $this->encode_for_xml($input['value'])); } } $xml .= '</field>'."\n"; } // select if($field['class'] == "select"){ $xml .= sprintf('<field type="select" required="%s" multiple="%s" title="%s">'."\n", $field['required'], $field['multiple'], (isset($field['title']) ? $this->encode_for_xml($field['title']) : '')); if(is_array($field['values'])){ foreach($field['values'] as $input){ $xml .= sprintf('<option checked="%s">%s</option>'."\n", $input['default'], $this->encode_for_xml($input['value'])); } } $xml .= '</field>'."\n"; } } } $xml .= '</form>'."\n"; return $xml; } /** * @abstract Encodes strings for xml. * @param string $string * @access private * @return string */ protected function encode_for_xml($string){ $string = html_entity_decode($string, ENT_NOQUOTES, 'UTF-8'); $string = htmlentities($string, ENT_NOQUOTES, 'UTF-8'); // manually add back in html $string = str_replace("&lt;", "<", $string); $string = str_replace("&gt;", ">", $string); return $string; } /** * Renders the generated html of the form. * * @param string $form_action Action attribute of the form element. * @access public * @uses generate_html */ public function render_html($form_action = false){ print $this->generate_html($form_action); } /** * Generates the form structure in html. * * @param string $form_action Action attribute of the form element. * @return string * @access public */ public function generate_html($form_action = false){ $html = ''; $form_action = $form_action ? $form_action : $_SERVER['PHP_SELF']; if(is_array($this->_structure)){ $html .= '<form class="frm-bldr" method="post" action="'.$form_action.'">' . "\n"; $html .= '<ol>'."\n"; foreach($this->_structure as $field){ $html .= $this->loadField($field); } $html .= '<li class="btn-submit"><input type=