fUser.php

<?php

/**
 * Get either a gravatar URL or a complete image tag for a specified email
 * 
 * @param string $sEmail The email address
 * @param string $sSize The size on pixels, defaults to 80px [ 1 - 2048 ]
 * @param string $sDefault Default imageset to use [ 404 | mp | identicon | monsterid | wavatar ]
 * @param string $sRating Maximum rating (inclusive) [ g | pg | r | x ]
 * @param boolean $bImg True to return the complete img-tag, false for just the URL
 * @param array $aParams Optional key/values to the img-tag
 * @return string Containing either URL or complete img-tag
 */
function getGravatarImage( $sEmail, $sSize = 80, $sDefault = 'mp', $sRating = 'g', $bImg = false, $aParams = array() ) {
	$sUrl = 'https://www.gravatar.com/avatar/';
	$sUrl .= md5( strtolower( $sEmail ) );
	$sUrl .= "?s=$sSize&d=$sDefault&r=$sRating";
	if( $bImg ) {
		$sUrl = '<img src="' . $sUrl . '"';
		foreach( $aParams as $sKey => $sValue ) {
			$sUrl .= ' ' . $sKey . '="' . $sValue . '"';
		}
		$sUrl . '/>';
	}
	return $sUrl;
}