Online PHP editor | rfc for IO6Ll

<?php /** * Example: Decode an Input Stream with PHP filters * * decode-input-stream-example.php * * @link https://gist.github.com/hakre/d34239bb237c50e728fd * @link http://stackoverflow.com/q/25051578/367456 */ # given a file which contains hex-encoded binary sequences that are partially disruped by US-ASCII control characters $transport = '<?xml version=\x221.0\x22 encoding=\x22UTF-8\x22?> \x0A<issues>\x0A\x09<issue id=\x225863\x22 found=\x221\x22>\xD0\x9F\xD0\xBE \xD0\xBD\xD0\xBE\xD0\xBC\xD0\xB5\xD1\x80\xD1\x83 \xD1\x81\xD1\x87\xD0\xB 5\xD1\x82\xD0\xB0 19479 \xD0\xBD\xD0\xB0\xD0\xB9\xD0\xB4\xD0\xB5\xD0\xBD\xD0\xBE:\x0A\xD0\x97\xD0\xB0\xD0\xBA\xD0\xB0\xD0\xB7 \xD0\xBF\xD0\xBE\xD0\xBA\xD1\x83\xD0\xBF\xD0\xB0\xD1\x82\xD0\xB5\xD0\xBB\xD1\x8F 0000015597 \xD0\xBE...</issue></issues>'; $file = 'data://text/plain;base64,' . base64_encode($transport); # registering two filters, one to remove control characters, the other to decode hex-sequences stream_filter_register('filter.controlchars', 'ControlCharsFilter'); stream_filter_register('decode.hexsequences', 'HexDecodeFilter'); # allows to chain those filters and to obtain the decoded (raw) data on-the-fly $filters = 'filter.controlchars/decode.hexsequences'; $xml = simplexml_load_file("php://filter/read=$filters/resource=" . $file); echo "isseu id: ", $xml->issue['id'], "\n"; $xml->asXML('php://stdout'); /** * Class ReadFilter */ abstract class ReadFilter extends php_user_filter { function filter($in, $out, &$consumed, $closing) { while ($bucket = stream_bucket_make_writeable($in)) { $bucket->data = $this->apply($bucket->data); $consumed += $bucket->datalen; stream_bucket_append($out, $bucket); } return PSFS_PASS_ON; } abstract function apply($string); } /** * Class ControlCharsFilter */ class ControlCharsFilter extends ReadFilter { function apply($string) { return preg_replace('~[\x00-\x1f]+~', '', $string); } } /** * Class HexDecodeFilter */ class HexDecodeFilter extends ReadFilter { function apply($string) { return preg_replace_callback( '/\\\\x([A-F0-9]{2})/i', 'self::decodeHexMatches' , $string ); } private static function decodeHexMatches($matches) { return hex2bin($matches[1]); } }

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