php生成EAN_13标准条形码实例

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);
$bg = ImageColorAllocate($img,255,255);
ImageFilledRectangle($img,$lw*95+60,$hi+30,$bg);
$shift=10;
for ($x=0;$x if (($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,20,$hi+5,$code[0],$fg);
for ($x=0;$x<6;$x++) {
ImageString($img,$lw*(8+$x*6)+30,$code[$x+1],$fg);
ImageString($img,$lw*(53+$x*6)+30,$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');

?>