*/
public static function encodeStringAsDataURI( $contents, $type, $ie8Compat = true ) {
// Try #1: Non-encoded data URI
+
+ // Remove XML declaration, it's not needed with data URI usage
+ $contents = preg_replace( "/<\\?xml.*?\\?>/", '', $contents );
// The regular expression matches ASCII whitespace and printable characters.
if ( preg_match( '/^[\r\n\t\x20-\x7e]+$/', $contents ) ) {
// Do not base64-encode non-binary files (sane SVGs).
$encoded = preg_replace( '/ {2,}/', ' ', $encoded );
// Remove leading and trailing spaces
$encoded = preg_replace( '/^ | $/', '', $encoded );
+
$uri = 'data:' . $type . ',' . $encoded;
if ( !$ie8Compat || strlen( $uri ) < self::DATA_URI_SIZE_LIMIT ) {
return $uri;