Mini Gavatar Cache

gistfile1.aw

<?php
/* Mini Gavatar Cache */
/* 注：该程序中部分代码是WordPress所用，小幅修改即可复用。 */
 function my_avatar( $email, $size = '50', $default = '', $alt = false ) {
     $alt = (false === $alt) ? '' : esc_attr( $alt );
     $f = md5( strtolower( $email ) );
     $w = home_url(); //$w = get_bloginfo('url');
     $a = $w. '/avatar/'. $f . '.jpg';
     $e = preg_replace('/wordpress\//', '', ABSPATH) . 'avatar/' . $f . '.jpg';
     $t = 604800; //设定7天, 单位:秒
     if ( empty($default) ) $default = $w. '/avatar/default.jpg';
     if ( !is_file($e) || (time() - filemtime($e)) > $t ){ //当头像不存在或者文件超过7天才更新
         $r = get_option('avatar_rating');
         $g = sprintf( "http://www.gravatar.com", ( hexdec( $f{0} ) % 2 ) ). '/avatar/'. $f. '?s='. $size. '&d='. $default. '&r='. $r;
         copy($g, $e);
     }
     if (filesize($e) < 500) copy($default, $e);
     $avatar = "<img title='{$alt}' alt='{$alt}' src='{$a}' class='avatar avatar-{$size} photo' height='{$size}' width='{$size}' />";
     return $avatar;
 }
?>