<?php namespace Laravel;
class HTML {
/**
* Convert HTML characters to entities.
*
* The encoding specified in the application configuration file will be used.
*
* @param string $value
* @return string
*/
public static function entities($value)
{
return htmlentities($value, ENT_QUOTES, Config::get('application.encoding'), false);
}
/**
* Generate a link to a JavaScript file.
*
* <code>
* // Generate a link to a JavaScript file
* echo HTML::script('js/jquery.js');
*
* // Generate a link to a JavaScript file and add some attributes
* echo HTML::script('js/jquery.js', array('defer'));
* </code>
*
* @param string $url
* @param array $attributes
* @return string
*/
public static function script($url, $attributes = array())
{
$url = static::entities(URL::to_asset($url));
return '<script type="text/javascript" src="'.$url.'"'.static::attributes($attributes).'></script>'.PHP_EOL;
}
/**
* Generate a link to a CSS file.
*
* If no media type is selected, "all" will be used.
*
* <code>
* // Generate a link to a CSS file
* echo HTML::style('css/common.css');
*
* // Generate a link to a CSS file and add some attributes
* echo HTML::style('css/common.css', array('media' => 'print'));
* </code>
*
* @param string $url
* @param array $attributes
* @return string
*/
public static function style($url, $attributes = array())
{
$defaults = array('media' => 'all', 'type' => 'text/css', 'rel' => 'stylesheet');
foreach ($defaults as $attribute => $default)
{
if ( ! array_key_exists($attribute, $attributes)) $attributes[$attribute] = $default;
}
return '<link href="'.static::entities(URL::to_asset($url)).'"'.static::attributes($attributes).'>'.PHP_EOL;
}
/**
* Generate a HTML span.
*
* @param string $value
* @param array $attributes
* @return string
*/
public static function span($value, $attributes = array())
{
return '<span'.static::attributes($attributes).'>'.static::entities($value).'</span>';
}
/**
* Generate a HTML link.
*
* <code>
* // Generate a link to a location within the application
* echo HTML::link('user/profile', 'User Profile');
*
* // Generate a link to a location outside of the application
* echo HTML::link('http://google.com', 'Google');
* </code>
*
* @param string $url
* @param string $title
* @param array $attributes
* @param bool $https
* @param bool $asset
* @return string
*/
public static function link($url, $title, $attributes = array(), $https = false, $asset = false)
{
$url = static::entities(URL::to($url, $https, $asset));
return '<a href="'.$url.'"'.static::attributes($attributes).'>'.static::entities($title).'</a>';
}
/**
* Generate a HTTPS HTML link.
*
* @param string $url
* @param string $title
* @param array $attributes
* @return string
*/
public static function link_to_secure($url, $title, $attributes = array())
{
return static::link($url, $title, $attributes, true);
}
/**
* Generate an HTML link to an asset.
*
* The application index page will not be added to asset links.
*
* @param string $url
* @param string $title
* @param array $attributes
* @return string
*/
public static function link_to_asset($url, $title, $attributes = array(), $https = false)
{
return static::link($url, $title, $attributes, $https, true);
}
/**
* Generate an HTTPS HTML link to an asset.
*
* @param string $url
* @param string $title
* @param array $attributes
* @return string
*/
public static function link_to_secure_asset($url, $title, $attributes = array())
{
return static::link_to_asset($url, $title, $attributes, true);
}
/**
* Generate an HTML link to a route.
*
* An array of parameters may be specified to fill in URI segment wildcards.
*
* <code>
* // Generate a link to the "profile" named route
* echo HTML::link_to_route('profile', 'Profile');
*
* // Generate a link to the "profile" route and add some parameters
* echo HTML::link_to_route('profile', 'Profile', array('taylor'));
* </code>
*
* @param string $name
* @param string $title
* @param array $parameters
* @param array $attributes
* @return string
*/
public static function link_to_route($name, $title, $parameters = array(), $attributes = array(), $https = false)
{
return static::link(URL::to_route($name, $parameters, $https), $title, $attributes);
}
/**
* Generate an HTTPS HTML link to a route.
*
* @param string $name
* @param string $title
* @param array $parameters
* @param array $attributes
* @return string
*/
public static function link_to_secure_route($name, $title, $parameters = array(), $attributes = array())
{
return static::link_to_route($name, $title, $parameters, $attributes, true);
}
/**
* Generate an HTML mailto link.
*
* The E-Mail address will be obfuscated to protect it from spam bots.
*
* @param string $email
* @param string $title
* @param array $attributes
* @return string
*/
public static function mailto($email, $title = null, $attributes = array())
{
$email = static::email($email);
if (is_null($title)) $title = $email;
$email = 'mailto:'.$email;
return '<a href="'.$email.'"'.static::attributes($attributes).'>'.static::entities($title).'</a>';
}
/**
* Obfuscate an e-mail address to prevent spam-bots from sniffing it.
*
* @param string $email
* @return string
*/
public static function email($email)
{
return str_replace('@', '@', static::obfuscate($email));
}
/**
* Generate an HTML image element.
*
* @param string $url
* @param string $alt
* @param array $attributes
* @return string
*/
public static function image($url, $alt = '', $attributes = array())
{
$attributes['alt'] = $alt;
return '<img src="'.static::entities(URL::to_asset($url)).'"'.static::attributes($attributes).'>';
}
/**
* Generate an ordered list of items.
*
* @param array $list
* @param array $attributes
* @return string
*/
public static function ol($list, $attributes = array())
{
return static::list_elements('ol', $list, $attributes);
}
/**
* Generate an un-ordered list of items.
*
* @param array $list
* @param array $attributes
* @return string
*/
public static function ul($list, $attributes = array())
{
return static::list_elements('ul', $list, $attributes);
}
/**
* Generate an ordered or un-ordered list.
*
* @param string $type
* @param array $list
* @param array $attributes
* @return string
*/
private static function list_elements($type, $list, $attributes = array())
{
$html = '';
foreach ($list as $key => $value)
{
$html .= (is_array($value)) ? static::list_elements($type, $value) : '<li>'.static::entities($value).'</li>';
}
return '<'.$type.static::attributes($attributes).'>'.$html.'</'.$type.'>';
}
/**
* Build a list of HTML attributes from an array.
*
* @param array $attributes
* @return string
*/
public static function attributes($attributes)
{
$html = array();
foreach ((array) $attributes as $key => $value)
{
// Assume numeric-keyed attributes to have the same key and value.
// Example: required="required", autofocus="autofocus", etc.
if (is_numeric($key)) $key = $value;
if ( ! is_null($value))
{
$html[] = $key.'="'.static::entities($value).'"';
}
}
return (count($html) > 0) ? ' '.implode(' ', $html) : '';
}
/**
* Obfuscate a string to prevent spam-bots from sniffing it.
*
* @param string $value
* @return string
*/
protected static function obfuscate($value)
{
$safe = '';
foreach (str_split($value) as $letter)
{
switch (rand(1, 3))
{
// Convert the letter to its entity representation.
case 1:
$safe .= '&#'.ord($letter).';';
break;
// Convert the letter to a Hex character code.
case 2:
$safe .= '&#x'.dechex(ord($letter)).';';
break;
// No encoding.
case 3:
$safe .= $letter;
}
}
return $safe;
}
/**
* Magic Method for handling dynamic static methods.
*
* This method primarily handles dynamic calls to create links to named routes.
*
* <code>
* // Generate a link to the "profile" named route
* echo HTML::link_to_profile('Profile');
*
* // Generate a link to the "profile" route and add some parameters
* echo HTML::link_to_profile('Profile', array('taylor'));
*
* // Generate a link to the "profile" named route using HTTPS
* echo HTML::link_to_secure_profile('Profile');
* </code>
*/
public static function __callStatic($method, $parameters)
{
if (strpos($method, 'link_to_secure_') === 0)
{
array_unshift($parameters, substr($method, 15));
return forward_static_call_array('HTML::link_to_secure_route', $parameters);
}
if (strpos($method, 'link_to_') === 0)
{
array_unshift($parameters, substr($method, 8));
return forward_static_call_array('HTML::link_to_route', $parameters);
}
throw new \Exception("Method [$method] is not defined on the HTML class.");
}
}