twitterのアイコン画像を取得する

gistfile1.php

<?php

// http://mgng.aws.af.cm/twicon

$id = isset( $_GET['id'] ) ? $_GET['id'] : '';
$size = isset( $_GET['size'] ) ? $_GET['size'] : '';

if ( !preg_match( '/\A[\w\-]+\z/u', $id ) ) {
  header('Not Found', true, 404);
  exit;
}

if ( !preg_match( '/\A(mini|normal|bigger|org)\z/', $size) ) {
  $size = 'normal';
}

$src = @file_get_contents(
  "http://twitter.com/{$id}",
  false,
  stream_context_create (
    array(
      'http' => array(
        'method' => 'GET',
        'header' => implode( "\r\n", array(
          'User-Agent: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:18.0) Gecko/20100101 Firefox/18.0',
          'Referer: https://twitter.com/',
        )) . "\r\n",
      )
    )
  )
);

if ( $src === false ) {
  header('Not Found', true, 404);
  exit;
}

preg_match( '/src=".+\/\/(.+?\/(default_|)profile_images\/.+?)"/u', $src, $m );
if ( !isset( $m[1] ) ) {
	header( 'Not Found', true, 404 );
	exit;
}
$redirect_img = 'http://' . preg_replace( '/_(small|mini|normal|bigger|org)+/u', ($size === 'org') ? '' : "_{$size}" , $m[1]);

header( "Cache-Control: max-age=3600" );
header( "Location: {$redirect_img}" );