带条形码的在线通行证
我必须使用条形码建立一个在线通行证生成器系统。
我开发的模块允许管理员设置哪些代码可用，当用户请求通行证时，php 脚本会生成通行证的 jpeg，并在底部打印一个小条形码。
条形码是使用以下方式生成的： http://www.dafont.com/3of9-barcode.font
问：是那些条形码通用吗？我需要知道条形码扫描仪是否适用于那些打印的通行证。
I have to set up a system for an online-pass generator using barcodes.
The module i developed lets the admins set which codes are available, and when a user requests a pass, the php script generates a jpeg of the pass with a small barcode print at the bottom.
The barcode is generated using:
http://www.dafont.com/3of9-barcode.font
Q: Are those barcodes universal? I need to know if the barcode scanner will work on those printed passes.
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实际上有很多不同的条形码字符集。您需要找出将读取代码的扫描仪将使用哪种标准，并找到支持该标准的字体或生成器。
请参阅 http://en.wikipedia.org/wiki/Barcode#Symbologies他们的名单。
There are actually quite a few different sets of barcode characters out there. You need to find out which standard the scanners that will be reading the codes will use and find a font or generator that supports that standard.
See http://en.wikipedia.org/wiki/Barcode#Symbologies for a list of them.
Mikeschuld 提供了有关条形码打印和扫描的良好信息。我的经验是，Code 39 是最普遍的条形码格式之一，我遇到的每台扫描仪都默认配置为读取 Code 39 条形码。
mikeschuld has provided good information about barcode printing and scanning. My experience has been that Code 39 is one of the most pervasive barcode formats and every scanner that I have run into has been configured to read Code 39 barcodes by default.