生成条形码时，字符数有限制吗？
我必须开发一个系统来生成要打印的条形码，并且想知道条形码的字符数是否有限制？我打算使用 PHP 来实现这一点，使用 QR 码是否会更好？
编辑
我想为一个存储不同类型鞋子的系统做这个条形码，但由于鞋子有很多变化，我需要更多的字符，但我想我可以使用十六进制数字来创建条形码（不确定这是否可能，我正在研究）
I have to develop a system that generates barcodes that will be printed and was wondering if there's a limit to the number of characters of a barcode? I intend to make this using PHP, also would it be better in some way to use QR codes?
EDIT
I want to do this barcodes for a system that will stor different types of shoes but since there are lots of variations to the shoes I require some more characters, but I think I can use hexadecimal numbers to create the barcodes (not sure if this is possible I'm looking into it)
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所有条形码对其可以表示的字符数（或者最常见的是数字）都有一定的限制 - 您不会期望任何类型的条形码能够容纳无限量的数据，不是吗？ ;)
有多种条形码，有些甚至具有可变长度。
发出条形码并不像您想象的那么简单，您可能必须：
QR 码和 Semacode 是二维的，这使得打乱它们所保存的数据变得更加困难，而且我几乎可以肯定它们不受监管，但它们也更难生成。
有关您想要做什么（以及为什么）的更多信息将会有所帮助，否则您可能不会得到任何像样的答案。
一些思考：
All barcodes have some limit on the number of characters (or, most commonly, digits) they can represent - you wouldn't expect any kind of barcode to hold an infinite amount of data, would you? ;)
There are many kinds of barcodes, some even have variable lengths.
Emitting barcodes is not as simple as you may think, you'd probably have to:
QR Codes and Semacodes are two-dimensional, this makes it harder to scramble the data they hold and I'm almost sure they are not regulated, but they are also a bit harder to generate.
Some more information about what (and why) you want to do would be helpful, otherwise you probably won't get any decent answers.
Some food for thought:
当然，字符数是有限制的。普通条形码通常可以编码大约 12 位数字或少量数据。二维码通常可以存储几千字节的数据。这一切都取决于您选择的条形码/矩阵码的类型。这很可能取决于谁会阅读这些代码。
概述如下：http://en.wikipedia.org/wiki/Barcode#Types_of_barcodes
Of course there's a limit on the number of characters. Normal barcodes can usually encode somewhere around 12 digits or a handful of bits of data. Two dimensional codes can typically store a few thousand bytes of data. This all depends on the type of barcode/matrix code you choose. And this most likely depends on who will read these codes.
Here's an overview: http://en.wikipedia.org/wiki/Barcode#Types_of_barcodes