Pada kesempatan kali ini saya akan membagikan Aplikasi scan barcode makan di kantin dengan PHP. Terus koneksi internet. Dengan PHP, MySQL dan.
We have been developing web application in php.
We need barcode scanner to be integrated into our application.
Our application is divided into two modules, users and merchant.
When user comes and scans the card, merchant should be identified the user by barcode number. Admin will give barcode number and that is being sent to the card manufacturer and the number will be assigned to the magnetic stripe.
As i know scanner can acts as a key board, can you please tell the method to integrate barcode scanner into this php web based application?
4 Answers
PHP can be easily utilized for reading bar codes printed on paper documents. Connecting manual barcode reader to the computer via USB significantly extends usability of PHP (or any other web programming language) into tasks involving document and product management, like finding a book records in the database or listing all bills for a particular customer.
Following sections briefly describe process of connecting and using manual bar code reader with PHP.
The usage of bar code scanners described in this article are in the same way applicable to any web programming language, such as ASP, Python or Perl. This article uses only PHP since all tests have been done with PHP applications.
What is a bar code reader (scanner)
Bar code reader is a hardware pluggable into computer that sends decoded bar code strings into computer. The trick is to know how to catch that received string. With PHP (and any other web programming language) the string will be placed into focused input HTML element in browser. Thus to catch received bar code string, following must be done:
just before reading the bar code, proper input element, such as INPUT TEXT FIELD must be focused (mouse cursor is inside of the input field).once focused, start reading the codewhen the code is recognized (bar code reader usually shortly beeps), it is send to the focused input field. By default, most of bar code readers will append extra special character to decoded bar code string called CRLF (ENTER). For example, if decoded bar code is '12345AB', then computer will receive '12345ABENTER'. Appended character ENTER (or CRLF) emulates pressing the key ENTER causing instant submission of the HTML form:
Choosing the right bar code scanner
When choosing bar code reader, one should consider what types of bar codes will be read with it. Some bar codes allow only numbers, others will not have checksum, some bar codes are difficult to print with inkjet printers, some barcode readers have narrow reading pane and cannot read for example barcodes with length over 10 cm. Most of barcode readers support common barcodes, such as EAN8, EAN13, CODE 39, Interleaved 2/5, Code 128 etc.
For office purposes, the most suitable barcodes seem to be those supporting full range of alphanumeric characters, which might be:
- code 39 - supports 0-9, uppercased A-Z, and few special characters (dash, comma, space, $, /, +, %, *)
- code 128 - supports 0-9, a-z, A-Z and other extended characters
Other important things to note:
- make sure all standard barcodes are supported, at least CODE39, CODE128, Interleaved25, EAN8, EAN13, PDF417, QRCODE.
- use only standard USB plugin cables. RS232 interfaces are meant for industrial usage, rather than connecting to single PC.
- the cable should be long enough, at least 1.5 m - the longer the better.
- bar code reader plugged into computer should not require other power supply - it should power up simply by connecting to PC via USB.
- if you also need to print bar code into generated PDF documents, you can use TCPDF open source library that supports most of common 2D bar codes.
Installing scanner drivers
Installing manual bar code reader requires installing drivers for your particular operating system and should be normally supplied with purchased bar code reader.
Once installed and ready, bar code reader turns on signal LED light. Reading the barcode starts with pressing button for reading.
Feb 17, 2016 - Jeremy Keith & Rachel Andrew HTML5 For Web Designers. HTML5 and CSS3, through approachable, entertaining writing and practical examples. —Ethan Marcotte Web designer and author of Responsive Web Design. May 4, 2010 - Jeremy Keith First Edition: HTML5 For Web Designers. —Ethan Marcotte Web designer and author of Responsive Web Design. His time-wasting on adactio.com, where he has been writing for over fifteen years. A book apart html5 for web designers pdf writer.
Scanning the barcode - how does it work?
STEP 1 - Focused input field ready for receiving character stream from bar code scanner:
STEP 2 - Received barcode string from bar code scanner is immediatelly submitted for search into database, which creates nice 'automated' effect:
STEP 3 - Results returned after searching the database with submitted bar code:
Conclusion
It seems, that utilization of PHP (and actually any web programming language) for scanning the bar codes has been quite overlooked so far. However, with natural support of emulated keypress (ENTER/CRLF) it is very easy to automate collecting & processing recognized bar code strings via simple HTML (GUI) fomular. Safari magazine gujarati pdf free download 2015.
The key is to understand, that recognized bar code string is instantly sent to the focused HTML element, such as INPUT text field with appended trailing character ASCII 13 (=ENTER/CRLF, configurable option), which instantly sends input text field with populated received barcode as a HTML formular to any other script for further processing.
Hope this helps you :)
Membuat Barcode Dengan Php
You can use AJAX for that. Whenever you scan a barcode, your scanner will act as if it is a keyboard typing into your input type='text' components. With JavaScript, capture the corresponding event, and send HTTP REQUEST and process responses accordingly.
I've been using something like this. Just set up a simple HTML page with an textinput. Make sure that the textinput always has focus. When you scan a barcode with your barcode scanner you will receive the code and after that a 'enter'. Realy simple then; just capture the incoming keystrokes and when the 'enter' comes in you can use AJAX to handle your code.
If you have Bluetooth, Use twedge on windows and getblue app on android, they also have a few videos of it. It's made by TEC-IT. I've got it to work by setting the interface option to bluetooth server in TWedge and setting the output setting in getblue to Bluetooth client and selecting my computer from the Bluetooth devices list. Make sure your computer and phone is paired. Also to get the barcode as input set the action setting in TWedge to Keyboard Wedge. This will allow for you to first click the input text box on said form, then scan said product with your phone and wait a sec for the barcode number to be put into the text box. Using this method requires no php that doesn't already exist in your current form processing, just process the text box as usual and viola your phone scans bar codes, sends them to your pc via Bluetooth wirelessly, your computer inserts the barcode into whatever text field is selected in any application or website. Hope this helps.
protected by Community♦May 25 '17 at 11:15
Thank you for your interest in this question. Because it has attracted low-quality or spam answers that had to be removed, posting an answer now requires 10 reputation on this site (the association bonus does not count).
Would you like to answer one of these unanswered questions instead?