如何用PHP画出条形码

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<strlen($bars)$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('12345678901')

?>

因为用户的需要

写了一个条形码；用php生成一个条形码的图片

这个大家应该比我要好很多的吧，在自己项目的根目录下建立一个测试文件(直接把下面的代码放进去运行一下看看，我也是抄袭别人的)，在实际的项目中你可以将下面的代码封装到一个公共类文件下的一个函数，然后调用。

class

testinfo{

function

UPCAbarcode($code)

{

$trans_code

=

$code

$lw

=

2.2

$hi

=

40

$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'

/*

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($lw*75+30,$hi-3)

//

95

$fg

=

ImageColorAllocate($img,

0,

0,

0)

$bg

=

ImageColorAllocate($img,

255,

255,

255)

ImageFilledRectangle($img,

0,

0,

$lw*75+30,

$hi+30,

$bg)

$shift=10

for

($x=0$x<strlen($bars)$x++)

{

if

(($x<0)

||

($x>=45

&&

$x<46)

||

($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*95-7,$hi,$code[11],$fg)

/*

Output

the

Header

and

Content.

*/

header("Content-Type:

image/png")

ImagePNG($img)

}

//}

echo

UPCAbarcode('201212070099')

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