system/helpers/form_helper.php

<?php  if (!defined('BASEPATH')) exit('No direct script access allowed');
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP 4.3.2 or newer
 *
 * @package		CodeIgniter
 * @author		ExpressionEngine Dev Team
 * @copyright	Copyright (c) 2006, EllisLab, Inc.
 * @license		http://codeigniter.com/user_guide/license.html
 * @link		http://codeigniter.com
 * @since		Version 1.0
 * @filesource
 */

// ------------------------------------------------------------------------

/**
 * CodeIgniter Form Helpers
 *
 * @package		CodeIgniter
 * @subpackage	Helpers
 * @category	Helpers
 * @author		ExpressionEngine Dev Team
 * @link		http://codeigniter.com/user_guide/helpers/form_helper.html
 */

// ------------------------------------------------------------------------

/**
 * Form Declaration
 *
 * Creates the opening portion of the form.
 *
 * @access	public
 * @param	string	the URI segments of the form destination
 * @param	array	a key/value pair of attributes
 * @param	array	a key/value pair hidden data
 * @return	string
 */	
if (! function_exists('form_open'))
{
	function form_open($action = '', $attributes = array(), $hidden = array())
	{
		$CI =& get_instance();

		$action = ( strpos($action, '://') === FALSE) ? $CI->config->site_url($action) : $action;

		$form = '<form action="'.$action.'"';
	
		if ( ! isset($attributes['method']))
		{
			$form .= ' method="post"';
		}
	
		if (is_array($attributes) AND count($attributes) > 0)
		{
			foreach ($attributes as $key => $val)
			{
				$form .= ' '.$key.'="'.$val.'"';
			}
		}
	
		$form .= '>';

		if (is_array($hidden) AND count($hidden > 0))
		{
			$form .= form_hidden($hidden);
		}
	
		return $form;
	}
}
	
// ------------------------------------------------------------------------

/**
 * Form Declaration - Multipart type
 *
 * Creates the opening portion of the form, but with "multipart/form-data".
 *
 * @access	public
 * @param	string	the URI segments of the form destination
 * @param	array	a key/value pair of attributes
 * @param	array	a key/value pair hidden data
 * @return	string
 */	
if (! function_exists('form_open_multipart'))
{
	function form_open_multipart($action, $attributes = array(), $hidden = array())
	{
		$attributes['enctype'] = 'multipart/form-data';
		return form_open($action, $attributes, $hidden);
	}
}
	
// ------------------------------------------------------------------------

/**
 * Hidden Input Field
 *
 * Generates hidden fields.  You can pass a simple key/value string or an associative
 * array with multiple values.
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @return	string
 */	
if (! function_exists('form_hidden'))
{
	function form_hidden($name, $value = '')
	{
		if ( ! is_array($name))
		{
			return '<input type="hidden" name="'.$name.'" value="'.form_prep($value).'" />';
		}

		$form = '';
		foreach ($name as $name => $value)
		{
			$form .= '<input type="hidden" name="'.$name.'" value="'.form_prep($value).'" />';
		}
	
		return $form;
	}
}
	
// ------------------------------------------------------------------------

/**
 * Text Input Field
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	string
 * @return	string
 */	
if (! function_exists('form_input'))
{
	function form_input($data = '', $value = '', $extra = '')
	{
		$defaults = array('type' => 'text', 'name' => (( ! is_array($data)) ? $data : ''), 'value' => $value, 'maxlength' => '500', 'size' => '50');

		return "<input ".parse_form_attributes($data, $defaults).$extra." />\n";
	}
}
	
// ------------------------------------------------------------------------

/**
 * Password Field
 *
 * Identical to the input function but adds the "password" type
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	string
 * @return	string
 */	
if (! function_exists('form_password'))
{
	function form_password($data = '', $value = '', $extra = '')
	{
		if ( ! is_array($data))
		{
			$data = array('name' => $data);
		}

		$data['type'] = 'password';
		return form_input($data, $value, $extra);
	}
}
	
// ------------------------------------------------------------------------

/**
 * Upload Field
 *
 * Identical to the input function but adds the "file" type
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	string
 * @return	string
 */	
if (! function_exists('form_upload'))
{
	function form_upload($data = '', $value = '', $extra = '')
	{
		if ( ! is_array($data))
		{
			$data = array('name' => $data);
		}

		$data['type'] = 'file';
		return form_input($data, $value, $extra);
	}
}
	
// ------------------------------------------------------------------------

/**
 * Textarea field
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	string
 * @return	string
 */	
if (! function_exists('form_textarea'))
{
	function form_textarea($data = '', $value = '', $extra = '')
	{
		$defaults = array('name' => (( ! is_array($data)) ? $data : ''), 'cols' => '90', 'rows' => '12');
	
	    if ( ! is_array($data) OR ! isset($data['value']))
		{
			$val = $value;
		}
	    else
		{
			$val = $data['value']; 
			unset($data['value']); // textareas don't use the value attribute
		}
		
		return "<textarea ".parse_form_attributes($data, $defaults).$extra.">".$val."</textarea>\n";
	}
}
	
// ------------------------------------------------------------------------

/**
 * Drop-down Menu
 *
 * @access	public
 * @param	string
 * @param	array
 * @param	string
 * @param	string
 * @return	string
 */	
if (! function_exists('form_dropdown'))
{
	function form_dropdown($name = '', $options = array(), $selected = array(), $extra = '')
	{
		if ( ! is_array($selected))
		{
			$selected = array($selected);
		}

		if ($extra != '') $extra = ' '.$extra;

		$multiple = (count($selected) > 1 && strpos($extra, 'multiple') === FALSE) ? ' multiple="multiple"' : '';

		$form = '<select name="'.$name.'"'.$extra.$multiple.">\n";
	
		foreach ($options as $key => $val)
		{
			$key = (string) $key;
			$val = (string) $val;
		
			$sel = (in_array($key, $selected))?' selected="selected"':'';
		
			$form .= '<option value="'.$key.'"'.$sel.'>'.$val."</option>\n";
		}

		$form .= '</select>';
	
		return $form;
	}
}
	
// ------------------------------------------------------------------------

/**
 * Checkbox Field
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	bool
 * @param	string
 * @return	string
 */	
if (! function_exists('form_checkbox'))
{
	function form_checkbox($data = '', $value = '', $checked = TRUE, $extra = '')
	{
		$defaults = array('type' => 'checkbox', 'name' => (( ! is_array($data)) ? $data : ''), 'value' => $value);
	
		if (is_array($data) AND array_key_exists('checked', $data))
		{
			$checked = $data['checked'];
		
			if ($checked == FALSE)
			{
				unset($data['checked']);
			}
			else
			{
				$data['checked'] = 'checked';
			}
		}
	
		if ($checked == TRUE)
			$defaults['checked'] = 'checked';
		else
			unset($defaults['checked']);

		return "<input ".parse_form_attributes($data, $defaults).$extra." />\n";
	}
}
	
// ------------------------------------------------------------------------

/**
 * Radio Button
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	bool
 * @param	string
 * @return	string
 */	
if (! function_exists('form_radio'))
{
	function form_radio($data = '', $value = '', $checked = TRUE, $extra = '')
	{
		if ( ! is_array($data))
		{	
			$data = array('name' => $data);
		}

		$data['type'] = 'radio';
		return form_checkbox($data, $value, $checked, $extra);
	}
}
	
// ------------------------------------------------------------------------

/**
 * Submit Button
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	string
 * @return	string
 */
if (! function_exists('form_submit'))
{	
	function form_submit($data = '', $value = '', $extra = '')
	{
		$defaults = array('type' => 'submit', 'name' => (( ! is_array($data)) ? $data : ''), 'value' => $value);

		return "<input ".parse_form_attributes($data, $defaults).$extra." />\n";
	}
}

// ------------------------------------------------------------------------

/**
 * Reset Button
 *
 * @access	public
 * @param	mixed
 * @param	string
 * @param	string
 * @return	string
 */	
if (! function_exists('form_reset'))
{
	function form_reset($data = '', $value = '', $extra = '')
	{
		$defaults = array('type' => 'reset', 'name' => (( ! is_array($data)) ? $data : ''), 'value' => $value);

		return "<input ".parse_form_attributes($data, $defaults).$extra." />\n";
	}
}

// ------------------------------------------------------------------------

/**
 * Form Label Tag
 *
 * @access	public
 * @param	string	The text to appear onscreen
 * @param	string	The id the label applies to
 * @param	string	Additional attributes
 * @return	string
 */	
if (! function_exists('form_label'))
{
	function form_label($label_text = '', $id = '', $attributes = array())
	{

		$label = '<label';
	
		if ($id != '')
		{
			 $label .= " for=\"$id\"";
		}
		
		if (is_array($attributes) AND count($attributes) > 0)
		{
			foreach ($attributes as $key => $val)
			{
				$label .= ' '.$key.'="'.$val.'"';
			}
		}

		$label .= ">$label_text</label>";

		return $label;
	}
}

// ------------------------------------------------------------------------
/**
 * Fieldset Tag
 *
 * Used to produce <fieldset><legend>text</legend>.  To close fieldset
 * use form_fieldset_close()
 *
 * @access	public
 * @param	string	The legend text
 * @param	string	Additional attributes
 * @return	string
 */	
if (! function_exists('form_fieldset'))
{
	function form_fieldset($legend_text = '', $attributes = array())
	{

		$fieldset = "<fieldset";

		if (is_array($attributes) AND count($attributes) > 0)
		{
			foreach ($attributes as $key => $val)
			{
				$fieldset .= ' '.$key.'="'.$val.'"';
			}
		}
	
		$fieldset .= ">\n";
	
		if ($legend_text != '')
		{
			$fieldset .= "<legend>$legend_text</legend>\n";
		}
		


		return $fieldset;
	}
}

// ------------------------------------------------------------------------

/**
 * Fieldset Close Tag
 *
 * @access	public
 * @param	string
 * @return	string
 */	
if (! function_exists('form_fieldset_close'))
{
	function form_fieldset_close($extra = '')
	{
		return "</fieldset>\n".$extra;
	}
}
	
// ------------------------------------------------------------------------

/**
 * Form Close Tag
 *
 * @access	public
 * @param	string
 * @return	string
 */	
if (! function_exists('form_close'))
{
	function form_close($extra = '')
	{
		return "</form>\n".$extra;
	}
}
	
// ------------------------------------------------------------------------

/**
 * Form Prep
 *
 * Formats text so that it can be safely placed in a form field in the event it has HTML tags.
 *
 * @access	public
 * @param	string
 * @return	string
 */	
if (! function_exists('form_prep'))
{
	function form_prep($str = '')
	{
		if ($str === '')
		{
			return '';
		}

		$temp = '__TEMP_AMPERSANDS__';
	
		// Replace entities to temporary markers so that 
		// htmlspecialchars won't mess them up
		$str = preg_replace("/&#(\d+);/", "$temp\\1;", $str);
		$str = preg_replace("/&(\w+);/",  "$temp\\1;", $str);

		$str = htmlspecialchars($str);

		// In case htmlspecialchars misses these.
		$str = str_replace(array("'", '"'), array("&#39;", "&quot;"), $str);	
	
		// Decode the temp markers back to entities
		$str = preg_replace("/$temp(\d+);/","&#\\1;",$str);
		$str = preg_replace("/$temp(\w+);/","&\\1;",$str);	
	
		return $str;	
	}
}
	
// ------------------------------------------------------------------------

/**
 * Parse the form attributes
 *
 * Helper function used by some of the form helpers
 *
 * @access	private
 * @param	array
 * @param	array
 * @return	string
 */	
if (! function_exists('parse_form_attributes'))
{
	function parse_form_attributes($attributes, $default)
	{
		if (is_array($attributes))
		{
			foreach ($default as $key => $val)
			{
				if (isset($attributes[$key]))
				{
					$default[$key] = $attributes[$key];
					unset($attributes[$key]);
				}
			}
		
			if (count($attributes) > 0)
			{	
				$default = array_merge($default, $attributes);
			}
		}
	
		$att = '';
		foreach ($default as $key => $val)
		{
			if ($key == 'value')
			{
				$val = form_prep($val);
			}
	
			$att .= $key . '="' . $val . '" ';
		}

		return $att;
	}
}

?>