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PHP4 HTTP Compression Speeds up the Web

PHP4 HTTP Compression Speeds up the Web

<? 

ob_start(); 
ob_implicit_flush(0); 
function GzDocOut(){ 
    global $HTTP_ACCEPT_ENCODING, $DEBUG; 
    $DEBUG = ($DEBUG) ? $DEBUG : 1; 
    if(preg_match('/(x-gzip|gzip)/', $HTTP_ACCEPT_ENCODING, $EncodeArr)){ 
        $ENCODING = $EncodeArr[1]; 
        $Contents = ob_get_contents(); 
        ob_end_clean(); 
        header("Content-Encoding: $ENCODING"); 
        $Contents .= ($DEBUG) ? "\n<!-- Use compress $ENCODING -->" : ''; 
        if($DEBUG == 2){ 
             $Contents .= "\n<!-- Not compress length: "; 
             $Contents .= number_format(strlen($Contents) / 1024, 2) . 'K -->'; 
             $Contents .= "\n<!-- Compressed length: "; 
             $Contents .= number_format(strlen(gzcompress($Contents)) / 1024, 2) . 'K -->'; 
        } 
        $Size = strlen($Contents); 
        $Crc = crc32($Contents); 
        $Contents = gzcompress($Contents); 
        print pack('c*',0x1f,0x8b,0x08,0x00,0x00,0x00,0x00,0x00); 
        print substr($Contents, 0, strlen($Contents) - 4); 
        print pack('V*',$Crc,$Size); 
        exit; 
    }else{ 
        print ($DEBUG) ? '<!--  Not compress -->' : ''; 
        ob_end_flush(); 
        exit; 
    } 
} 
?>