php生成EAN_13标准条形码实例

下面的就是生成EAN_13标准的条码的PHP方法,需要php+gd 环境 
  复制代码 代码如下:<?
function EAN_13($code) {
  //一个单元的宽度
  $lw = 2;
  //条码高 
  $hi = 100;
  // the guide code is no coding,is used to show the left part coding type//
  // Array guide is used to record the EAN_13 is left part coding type//
  $Guide = array(1=>"AAAAAA","AABABB","AABBAB","ABAABB","ABBAAB","ABBBAA","ABABAB","ABABBA","ABBABA");
  $Lstart ="101";
  $Lencode = array("A" => array("0001101","0011001","0010011","0111101","0100011","0110001","0101111","0111011","0110111","0001011"),
                   "B" => array("0100111","0110011","0011011","0100001","0011101","0111001","0000101","0010001","0001001","0010111"));
  $Rencode = array("1110010","1100110","1101100","1000010","1011100",
                   "1001110","1010000","1000100","1001000","1110100");       $center = "01010";   $ends = "101";
  if ( strlen($code) != 13 )
   { die("UPC-A Must be 13 digits."); }
$lsum =0;
$rsum =0;
  for($i=0;$i<(strlen($code)-1);$i++)
  {
    if($i % 2)
{
 // $odd += $ncode[$x]
  $lsum +=(int)$code[$i];
 }else{
  $rsum +=(int)$code[$i];
 }   }
  $tsum = $lsum*3 + $rsum;
    if($code[12] != (10-($tsum % 10)))
{
   die("the code is bad!");
    } 

 // echo $Guide[$code[0]];
  $barcode = $Lstart;
  for($i=1;$i<=6;$i++)
  {
    $barcode .= $Lencode [$Guide[$code[0]][($i-1)]] [$code[$i]];
  }
  $barcode .= $center;   for($i=7;$i<13;$i++)
  {
    $barcode .= $Rencode[$code[($i)]] ;
  }
  $barcode .= $ends;     $img = ImageCreate($lw*95+60,$hi+30);
  $fg = ImageColorAllocate($img, 0, 0, 0);
  $bg = ImageColorAllocate($img, 255, 255, 255);
  ImageFilledRectangle($img, 0, 0, $lw*95+60, $hi+30, $bg);
  $shift=10;
  for ($x=0;$x<strlen($barcode);$x++) {
    if (($x<4) || ($x>=45 && $x<50) || ($x >=92)) 
  { 
    $sh=10; 
  } else { 
    $sh=0; 
  }
    if ($barcode[$x] == "1") 
{ 
  $color = $fg;
    } else { 
  $color = $bg; 
}
    ImageFilledRectangle($img, ($x*$lw)+30,5,($x+1)*$lw+29,$hi+5+$sh,$color);
  }
  /* Add the Human Readable Label */
  ImageString($img,5,20,$hi+5,$code[0],$fg);
  for ($x=0;$x<6;$x++) {
    ImageString($img,5,$lw*(8+$x*6)+30,$hi+5,$code[$x+1],$fg);
    ImageString($img,5,$lw*(53+$x*6)+30,$hi+5,$code[$x+7],$fg);
  }
 // ImageString($img,4,$lw*95+17,$hi-5,$code[12],$fg);
  /* Output the Header and Content. */
  header("Content-Type: image/png");
  ImagePNG($img); }

EAN_13("6901028055048");

?>