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 {

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 ($x=0;$xif (($x<4) || ($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');

?>