这连天看见有人法帖讨论如很用php生成条形码,所以就用了点时间学了学ean_13标准.ean_13标准是广泛使用的条码编码标准,主要运用在商品流通方面,比如我们看到的商品上的条码就是这种编码标准,还有图书上的编码标准也是这种编码标准.
下面的就是我的一段代码生成的是ean_13标准的条码,需要php+gd 环境
[code:1:dfc50fedcf]<?
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');
?>
