quickform.php

完美的在线教育系统

                    $this->_elementIndex[$currentName] = $i + 1;
                } else 
                {
                	if (is_array($this->_duplicateIndex[$currentName]))
                	{
                    	$dupIdx = array_search($i, $this->_duplicateIndex[$currentName]);
                    	$this->_duplicateIndex[$currentName][$dupIdx] = $i + 1;
                	}
                }
                unset($this->_elements[$i]);
            }
        }
        // Put the element in place finally
        $this->_elements[$targetIdx] =& $element;
        if (!$duplicate) {
            $this->_elementIndex[$elementName] = $targetIdx;
        } else {
            $this->_duplicateIndex[$elementName][] = $targetIdx;
        }
        $element->onQuickFormEvent('updateValue', null, $this);
        if ($this->_freezeAll) {
            $element->freeze();
        }
        // If not done, the elements will appear in reverse order
        ksort($this->_elements);
        return $element;
    }

    // }}}
    // {{{ addGroup()

    /**
     * Adds an element group
     * @param    array      $elements       array of elements composing the group
     * @param    string     $name           (optional)group name
     * @param    string     $groupLabel     (optional)group label
     * @param    string     $separator      (optional)string to separate elements
     * @param    string     $appendName     (optional)specify whether the group name should be
     *                                      used in the form element name ex: group[element]
     * @return   object     reference to added group of elements
     * @since    2.8
     * @access   public
     * @throws   PEAR_Error
     */
    function &addGroup($elements, $name=null, $groupLabel='', $separator=null, $appendName = true)
    {
        static $anonGroups = 1;

        if (0 == strlen($name)) {
            $name       = 'qf_group_' . $anonGroups++;
            $appendName = false;
        }
        $group =& $this->addElement('group', $name, $groupLabel, $elements, $separator, $appendName);
        return $group;
    } // end func addGroup
    
    // }}}
    // {{{ &getElement()

    /**
     * Returns a reference to the element
     *
     * @param     string     $element    Element name
     * @since     2.0
     * @access    public
     * @return    object     reference to element
     * @throws    HTML_QuickForm_Error
     */
    function &getElement($element)
    {
        if (isset($this->_elementIndex[$element])) {
            return $this->_elements[$this->_elementIndex[$element]];
        } else {
            $error = PEAR::raiseError(null, QUICKFORM_NONEXIST_ELEMENT, null, E_USER_WARNING, "Element '$element' does not exist in HTML_QuickForm::getElement()", 'HTML_QuickForm_Error', true);
            return $error;
        }
    } // end func getElement

    // }}}
    // {{{ &getElementValue()

    /**
     * Returns the element's raw value
     * 
     * This returns the value as submitted by the form (not filtered) 
     * or set via setDefaults() or setConstants()
     *
     * @param     string     $element    Element name
     * @since     2.0
     * @access    public
     * @return    mixed     element value
     * @throws    HTML_QuickForm_Error
     */
    function &getElementValue($element)
    {
        if (!isset($this->_elementIndex[$element])) {
            $error = PEAR::raiseError(null, QUICKFORM_NONEXIST_ELEMENT, null, E_USER_WARNING, "Element '$element' does not exist in HTML_QuickForm::getElementValue()", 'HTML_QuickForm_Error', true);
            return $error;
        }
        $value = $this->_elements[$this->_elementIndex[$element]]->getValue();
        if (isset($this->_duplicateIndex[$element])) {
            foreach ($this->_duplicateIndex[$element] as $index) {
                if (null !== ($v = $this->_elements[$index]->getValue())) {
                    if (is_array($value)) {
                        $value[] = $v;
                    } else {
                        $value = (null === $value)? $v: array($value, $v);
                    }
                }
            }
        }
        return $value;
    } // end func getElementValue

    // }}}
    // {{{ getSubmitValue()

    /**
     * Returns the elements value after submit and filter
     *
     * @param     string     Element name
     * @since     2.0
     * @access    public
     * @return    mixed     submitted element value or null if not set
     */    
    function getSubmitValue($elementName)
    {
        $value = null;
        if (isset($this->_submitValues[$elementName]) || isset($this->_submitFiles[$elementName])) {
            $value = isset($this->_submitValues[$elementName])? $this->_submitValues[$elementName]: array();
            if (is_array($value) && isset($this->_submitFiles[$elementName])) {
                foreach ($this->_submitFiles[$elementName] as $k => $v) {
                    $value = HTML_QuickForm::arrayMerge($value, $this->_reindexFiles($this->_submitFiles[$elementName][$k], $k));
                }
            }

        } elseif ('file' == $this->getElementType($elementName)) {
            return $this->getElementValue($elementName);

        } elseif (false !== ($pos = strpos($elementName, '['))) {
            $base = str_replace(
                        array('\\', '\''), array('\\\\', '\\\''), 
                        substr($elementName, 0, $pos)
                    );
            $idx  = "['" . str_replace(
                        array('\\', '\'', ']', '['), array('\\\\', '\\\'', '', "']['"), 
                        substr($elementName, $pos + 1, -1)
                    ) . "']";
            if (isset($this->_submitValues[$base])) {
                $value = eval("return (isset(\$this->_submitValues['{$base}']{$idx})) ? \$this->_submitValues['{$base}']{$idx} : null;");
            }

            if ((is_array($value) || null === $value) && isset($this->_submitFiles[$base])) {
                $props = array('name', 'type', 'size', 'tmp_name', 'error');
                $code  = "if (!isset(\$this->_submitFiles['{$base}']['name']{$idx})) {\n" .
                         "    return null;\n" .
                         "} else {\n" .
                         "    \$v = array();\n";
                foreach ($props as $prop) {
                    $code .= "    \$v = HTML_QuickForm::arrayMerge(\$v, \$this->_reindexFiles(\$this->_submitFiles['{$base}']['{$prop}']{$idx}, '{$prop}'));\n";
                }
                $fileValue = eval($code . "    return \$v;\n}\n");
                if (null !== $fileValue) {
                    $value = null === $value? $fileValue: HTML_QuickForm::arrayMerge($value, $fileValue);
                }
            }
        }
        
        // This is only supposed to work for groups with appendName = false
        if (null === $value && 'group' == $this->getElementType($elementName)) {
            $group    =& $this->getElement($elementName);
            $elements =& $group->getElements();
            foreach (array_keys($elements) as $key) {
                $name = $group->getElementName($key);
                // prevent endless recursion in case of radios and such
                if ($name != $elementName) {
                    if (null !== ($v = $this->getSubmitValue($name))) {
                        $value[$name] = $v;
                    }
                }
            }
        }
        return $value;
    } // end func getSubmitValue

    // }}}
    // {{{ _reindexFiles()

   /**
    * A helper function to change the indexes in $_FILES array
    *
    * @param  mixed   Some value from the $_FILES array
    * @param  string  The key from the $_FILES array that should be appended
    * @return array
    */
    function _reindexFiles($value, $key)
    {
        if (!is_array($value)) {
            return array($key => $value);
        } else {
            $ret = array();
            foreach ($value as $k => $v) {
                $ret[$k] = $this->_reindexFiles($v, $key);
            }
            return $ret;
        }
    }

    // }}}
    // {{{ getElementError()

    /**
     * Returns error corresponding to validated element
     *
     * @param     string    $element        Name of form element to check
     * @since     1.0
     * @access    public
     * @return    string    error message corresponding to checked element
     */
    function getElementError($element)
    {
        if (isset($this->_errors[$element])) {
            return $this->_errors[$element];
        }
    } // end func getElementError
    
    // }}}
    // {{{ setElementError()

    /**
     * Set error message for a form element
     *
     * @param     string    $element    Name of form element to set error for
     * @param     string    $message    Error message, if empty then removes the current error message
     * @since     1.0       
     * @access    public
     * @return    void
     */
    function setElementError($element, $message = null)
    {
        if (!empty($message)) {
            $this->_errors[$element] = $message;
        } else {
            unset($this->_errors[$element]);
        }
    } // end func setElementError
         
     // }}}
     // {{{ getElementType()

     /**
      * Returns the type of the given element
      *
      * @param      string    $element    Name of form element
      * @since      1.1
      * @access     public
      * @return     string    Type of the element, false if the element is not found
      */
     function getElementType($element)
     {
         if (isset($this->_elementIndex[$element])) {
             return $this->_elements[$this->_elementIndex[$element]]->getType();
         }
         return false;
     } // end func getElementType

     // }}}
     // {{{ updateElementAttr()

    /**
     * Updates Attributes for one or more elements
     *
     * @param      mixed    $elements   Array of element names/objects or string of elements to be updated
     * @param      mixed    $attrs      Array or sting of html attributes
     * @since      2.10
     * @access     public
     * @return     void
     */
    function updateElementAttr($elements, $attrs)
    {
        if (is_string($elements)) {
            $elements = split('[ ]?,[ ]?', $elements);
        }
        foreach (array_keys($elements) as $key) {
            if (is_object($elements[$key]) && is_a($elements[$key], 'HTML_QuickForm_element')) {
                $elements[$key]->updateAttributes($attrs);
            } elseif (isset($this->_elementIndex[$elements[$key]])) {
                $this->_elements[$this->_elementIndex[$elements[$key]]]->updateAttributes($attrs);
                if (isset($this->_duplicateIndex[$elements[$key]])) {
                    foreach ($this->_duplicateIndex[$elements[$key]] as $index) {
                        $this->_elements[$index]->updateAttributes($attrs);
                    }
                }
            }
        }
    } // end func updateElementAttr

    // }}}
    // {{{ removeElement()

    /**
     * Removes an element
     *
     * The method "unlinks" an element from the form, returning the reference
     * to the element object. If several elements named $elementName exist, 
     * it removes the first one, leaving the others intact.
     * 
     * @param string    $elementName The element name
     * @param boolean   $removeRules True if rules for this element are to be removed too                     
     * @access public
     * @since 2.0
     * @return object HTML_QuickForm_element    a reference to the removed element
     * @throws HTML_QuickForm_Error
     */
    function &removeElement($elementName, $removeRules = true)
    {
        if (!isset($this->_elementIndex[$elementName])) {
            $error = PEAR::raiseError(null, QUICKFORM_NONEXIST_ELEMENT, null, E_USER_WARNING, "Element '$elementName' does not exist in HTML_QuickForm::removeElement()", 'HTML_QuickForm_Error', true);
            return $error;
        }
        $el =& $this->_elements[$this->_elementIndex[$elementName]];
        unset($this->_elements[$this->_elementIndex[$elementName]]);
        if (empty($this->_duplicateIndex[$elementName])) {
            unset($this->_elementIndex[$elementName]);
        } else {
            $this->_elementIndex[$elementName] = array_shift($this->_duplicateIndex[$elementName]);
        }
        if ($removeRules) {
            unset($this->_rules[$elementName], $this->_errors[$elementName]);
        }
        return $el;
    } // end func removeElement

    // }}}
    // {{{ addRule()

    /**
     * Adds a validation rule for the given field