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For more information on Gravatars, visit http://www.gravatar.com.

The Functions

The helper consists of two main functions, imgURL and imgTag.

imgURL returns just a URL to the user, to implement in their own HTML. Example:
Download code <?php
/** in your view **/
<img src="<?php echo $gravatar->imgURL($input); ?>" />
?>

imgTag returns actual <img> code, and has a second (optional) parameter to add a class to the image. Example:
Download code <?php echo $gravatar->imgTag($input); ?>

$input

$input is the main variable input into the helper. It works in two ways:

• a string containing just the email address.
• an array of options

If you choose to use the array of options, these are the options available:

• email => the email address
• size => the width of the image (in pixels)
• rating => restrict the avatar to a maximum rating (G, PG, R, X)
• default => the URL of an image to show if the user doesn't have a gravatar

The Code

Download code
<?php

/**
* GRAVATAR HELPER CLASS
*/

class GravatarHelper extends AppHelper {


    function imgURL($input) {
        return $this->makeURL($input);    
    }

    function imgTag($input, $class = false) {
        $url = $this->makeURL($input);
        $classHTML = $class != false ? 'class="' . $class . '"' : '';
        $output = '<img src="' . $url . '" '. $classHTML . ' />';
        return $output;
    }

    /* Private Function to generate a URL
     * Takes either an array of options (including email)
     * or a string with the email address- to use the defaults.
     */
    
    private function makeURL($input) {
        $baseURL = "http://www.gravatar.com/avatar/";
        
        if(is_string($input)) {
            $URL = $baseURL . md5($input);
            return $URL;
        }
        
        if(is_array($input)) {
            $URL = $baseURL . md5($input['email']) . '/?';
            if(array_key_exists('rating', $input)) {$URL .= 'r=' . $input['rating'] . '&';}
            if(array_key_exists('size', $input)) {$URL .= 's=' . $input['size'] . '&';}
            if(array_key_exists('default', $input)) {$URL .= 'default=' . urlencode($input['default']);}
            
            return $URL;
            
        }
        
    }
    
}