<?php
/**
* Class Gravatar
*
* From Gravatar Help:
* "A gravatar is a dynamic image resource that is requested from our server. The request
* URL is presented here, broken into its segments."
* Source:
* http://site.gravatar.com/site/implement
*
* Usage:
* <code>
* $email = "youremail@yourhost.com";
* $default = "http://www.yourhost.com/default_image.jpg"; // Optional
* $gravatar = new Gravatar($email, $default);
* $gravatar->size = 80;
* $gravatar->rating = "G";
* $gravatar->border = "FF0000";
*
* echo $gravatar; // Or echo $gravatar->toHTML();
* </code>
*
* Class Page: http://www.phpclasses.org/browse/package/4227.html
*
* @author Lucas Araújo <araujo.lucas@gmail.com>
* @version 1.0
* @package Gravatar
*/
class Gravatar
{
/**
* Gravatar's url
*/
const GRAVATAR_URL = "http://www.gravatar.com/avatar.php";
/**
* Ratings available
*/
private $GRAVATAR_RATING = array("G", "PG", "R", "X");
/**
* Query string. key/value
*/
protected $properties = array(
"gravatar_id" => NULL,
"default" => NULL,
"size" => 80, // The default value
"rating" => NULL,
"border" => NULL,
);
/**
* E-mail. This will be converted to md5($email)
*/
protected $email = "";
/**
* Extra attributes to the IMG tag like ALT, CLASS, STYLE...
*/
protected $extra = "";
/**
*
*/
public function __construct($email=NULL, $default=NULL) {
$this->setEmail($email);
$this->setDefault($default);
}
/**
*
*/
public function setEmail($email) {
if ($this->isValidEmail($email)) {
$this->email = $email;
$this->properties['gravatar_id'] = md5(strtolower($this->email));
return true;
}
return false;
}
/**
*
*/
public function setDefault($default) {
$this->properties['default'] = $default;
}
/**
*
*/
public function setRating($rating) {
if (in_array($rating, $this->GRAVATAR_RATING)) {
$this->properties['rating'] = $rating;
return true;
}
return false;
}
/**
*
*/
public function setSize($size) {
$size = (int) $size;
if ($size <= 0)
$size = NULL; // Use the default size
$this->properties['size'] = $size;
}
/**
*
*/
public function setExtra($extra) {
$this->extra = $extra;
}
/**
*
*/
public function isValidEmail($email) {
// Source: http://www.zend.com/zend/spotlight/ev12apr.php
return eregi("^[_a-z0-9-]+(\.[_a-z0-9-]+)*@[a-z0-9-]+(\.[a-z0-9-]+)*(\.[a-z]{2,3})$", $email);
}
/**
* Object property overloading
*/
public function __get($var) { return @$this->properties[$var]; }
/**
* Object property overloading
*/
public function __set($var, $value) {
switch($var) {
case "email": return $this->setEmail($value);
case "rating": return $this->setRating($value);
case "default": return $this->setDefault($value);
case "size": return $this->setSize($value);
// Cannot set gravatar_id
case "gravatar_id": return;
}
return @$this->properties[$var] = $value;
}
/**
* Object property overloading
*/
public function __isset($var) { return isset($this->properties[$var]); }
/**
* Object property overloading
*/
public function __unset($var) { return @$this->properties[$var] == NULL; }
/**
* Get source
*/
public function getSrc() {
$url = self::GRAVATAR_URL ."?";
$first = true;
foreach($this->properties as $key => $value) {
if (isset($value)) {
if (!$first)
$url .= "&";
$url .= $key."=".urlencode($value);
$first = false;
}
}
return $url;
}
/**
* toHTML
*/
public function toHTML() {
return '<img src="'. $this->getSrc() .'"'
.(!isset($this->size) ? "" : ' width="'.$this->size.'" height="'.$this->size.'"')
.$this->extra
.' />';
}
/**
* toString
*/
public function __toString() { return $this->toHTML(); }
}
?>
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