条形码怎么生成|PHP生成条形码实现程序

 代码如下   
function UPCAbarcode($code)
{
    $lw = 2; $hi = 100;
    $Lencode = array("0001101","0011001","0010011","0111101","0100011",
                    "0110001","0101111","0111011","0110111","0001011");
    $Rencode = array("1110010","1100110","1101100","1000010","1011100",
                    "1001110","1010000","1000100","1001000","1110100");
    $ends = "101"; $center = "01010";
  
    /* UPC-A Must be 11 digits, we compute the checksum. */
    if ( strlen($code) != 11 ) { die("UPC-A Must be 11 digits."); }
  
    /* Compute the EAN-13 Checksum digit */
    $ncode = "0".$code;
    $even = 0; $odd = 0;
    for ($x=0;$x<12;$x++)
    {
        if ($x % 2) { $odd += $ncode[$x]; } else { $even += $ncode[$x]; }
    }
  
    $code.=(10 - (($odd * 3 + $even) % 10)) % 10;
  
    /* Create the bar encoding using a binary string */
    $bars=$ends;
    $bars.=$Lencode[$code[0]];
    for($x=1;$x<6;$x++)
    {
        $bars.=$Lencode[$code[$x]];
    }
  
    $bars.=$center;
  
    for($x=6;$x<12;$x++)
    {
        $bars.=$Rencode[$code[$x]];
    }
  
    $bars.=$ends;
  
    /* Generate the Barcode Image */
    $img = ImageCreate($lw*95+30,$hi+30);
    $fg = ImageColorAllocate($img, 0, 0, 0);
    $bg = ImageColorAllocate($img, 255, 255, 255);
    ImageFilledRectangle($img, 0, 0, $lw*95+30, $hi+30, $bg);
  
    $shift=10;
  
    for ($x=0;$x     {
        if (($x<10) || ($x>=45 && $x<50) || ($x >=85)) { $sh=10; } else { $sh=0; }
        if ($bars[$x] == "1") { $color = $fg; } else { $color = $bg; }
        ImageFilledRectangle($img, ($x*$lw)+15,5,($x+1)*$lw+14,$hi+5+$sh,$color);
    }
  
    /* Add the Human Readable Label */
    ImageString($img,4,5,$hi-5,$code[0],$fg);
  
    for ($x=0;$x<5;$x++)
    {
        ImageString($img,5,$lw*(13+$x*6)+15,$hi+5,$code[$x+1],$fg);
        ImageString($img,5,$lw*(53+$x*6)+15,$hi+5,$code[$x+6],$fg);
    }
  
    ImageString($img,4,$lw*95+17,$hi-5,$code[11],$fg);
  
    /* Output the Header and Content. */
    header("Content-Type: image/png");
    ImagePNG($img);
  
}
  
UPCAbarcode("13322483157");
  
?>

条形码怎么生成|PHP生成条形码实现程序

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