Mega Code Archive
Barcodes On The Fly With GD
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REQUIRED: GD compiled into PHP.
Features:
o No fonts needed. This creates barcodes on the fly, drawing them
with gd.
o Amazingly fast and versatile. Specify the characters to convert
to barcode ON THE FLY!
o Cool backup feature-If for some reason the operator can't get the
barcode to scan, they hang their pointer over the barcode and the
'alt' feature displays the characters to enter in manually.
NOTE1: IMPORTANT! THE PROGRAM THAT DISPLAYS THIS PAGE KEEPS PUTTING AN
EXTRA " AFTER THE DOLLAR SIGN ON THE '"Z"=> "011010000", " "=> "011000100",
"$"=> "010101000",' LINE. YOU *MUST* REMOVE THIS WHEN YOU COPY/PASTE THE
CODE!
NOTE2: having just one extra blank line in code2 will make it puke. Put NO
blank lines at the beginning.
-----------code1(i.e. index.phtml)---------------------------------
<?php
function barcode($text) {
$enc_text = urlencode($text);
echo "<img src=\"barcode.phtml?$enc_text\" border=0
Alt=\"$text\">";
}
?>
<HTML>
<BODY bgcolor=white>
<?barcode( "steven boger");?>
</BODY>
</HTML>
-----code2(i.e. barcode.phtml)-just a few small mods to Stefan's code------
<?php
$text = implode($argv, " ");
$barcodeheight=40;
$barcodethinwidth=2;
$barcodethickwidth=$barcodethinwidth*3;
$codingmap = Array( "0"=> "000110100", "1"=> "100100001",
"2"=> "001100001", "3"=> "101100000", "4"=> "000110001",
"5"=> "100110000", "6"=> "001110000", "7"=> "000100101",
"8"=> "100100100", "9"=> "001100100", "A"=> "100001001",
"B"=> "001001001", "C"=> "101001000", "D"=> "000011001",
"E"=> "100011000", "F"=> "001011000", "G"=> "000001101",
"H"=> "100001100", "I"=> "001001100", "J"=> "000011100",
"K"=> "100000011", "L"=> "001000011", "M"=> "101000010",
"N"=> "000010011", "O"=> "100010010", "P"=> "001010010",
"Q"=> "000000111", "R"=> "100000110", "S"=> "001000110",
"T"=> "000010110", "U"=> "110000001", "V"=> "011000001",
"W"=> "111000000", "X"=> "010010001", "Y"=> "110010000",
"Z"=> "011010000", " "=> "011000100", "$"=> "010101000",
"%"=> "000101010", "*"=> "010010100", "+"=> "010001010",
"-"=> "010000101", "."=> "110000100", "/"=> "010100010");
$text = strtoupper($text);
$text = "*$text*"; // add start/stop chars.
$textlen = strlen($text);
$barcodewidth = ($textlen)*(7*$barcodethinwidth
+
3*$barcodethickwidth)-$barcodethinwidth;
$im = ImageCreate($barcodewidth,$barcodeheight);
$black = ImageColorAllocate($im,0,0,0);
$white = ImageColorAllocate($im,255,255,255);
imagefill($im,0,0,$white);
$xpos=0;
for ($idx=0;$idx<$textlen;$idx++) {
$char = substr($text,$idx,1);
// make unknown chars a '-';
if (!isset($codingmap[$char])) $char = "-";
for ($baridx=0;$baridx<=8;$baridx++) {
$elementwidth = (substr($codingmap[$char],$baridx,1)) ?
$barcodethickwidth
: $barcodethinwidth;
if (($baridx+1)%2) imagefilledrectangle($im,$xpos,0,$xpos+
$elementwidth-1,$barcodeheight,$black);
$xpos+=$elementwidth;
}
$xpos+=$barcodethinwidth;
}
Header( "Content-type: image/gif");
ImageGif($im);
ImageDestroy($im);
return;
?>
]]>