< php header( Status: 200 OK\n ); header( Location: /missinghtml ); > in Visual Studio .NET

Generation PDF 417 in Visual Studio .NET < php header( Status: 200 OK\n ); header( Location: /missinghtml ); >
< php header( Status: 200 OK\n ); header( Location: /missinghtml ); >
Scanning PDF-417 2d Barcode In VS .NET
Using Barcode Control SDK for .NET framework Control to generate, create, read, scan barcode image in .NET applications.
the missingphp script displays the HTTP success header and then instructs Apache to redirect the Web client to /missinghtml
PDF417 Creator In .NET Framework
Using Barcode drawer for Visual Studio .NET Control to generate, create PDF-417 2d barcode image in .NET applications.
Processing Web forms with PHP
PDF 417 Scanner In .NET
Using Barcode recognizer for .NET framework Control to read, scan read, scan image in VS .NET applications.
PHP makes Web form processing simple You can access Web form data fields as variables within a PHP script Listing 15-4 shows a simple Web form that has a single input field called keywords
Encoding Bar Code In VS .NET
Using Barcode encoder for .NET Control to generate, create bar code image in Visual Studio .NET applications.
Part III Running Web Applications
Bar Code Scanner In VS .NET
Using Barcode scanner for VS .NET Control to read, scan read, scan image in VS .NET applications.
Listing 15-4: simple_formhtml
Paint PDF-417 2d Barcode In C#.NET
Using Barcode printer for .NET Control to generate, create PDF 417 image in .NET applications.
<html> <head><title>Simple HTML Form</title> </head> <body> <form action= formphp > <input type= text name= keywords size=30> <input type=submit> </form> </body> </html>
Painting PDF417 In .NET
Using Barcode printer for ASP.NET Control to generate, create PDF 417 image in ASP.NET applications.
When a user submits this form via a Web browser, the browser sends a GET request such as http://server/formphp keywords=value_entered_in_the_form For example, if you enter the keyword makesite and submit the above form to wwwdomaincom, the Web server will receive a request for http://wwwdomain com/formphp keywords=makesite The formphp script responsible for processing this Web form is shown in Listing 15-5
PDF417 Encoder In VB.NET
Using Barcode generation for Visual Studio .NET Control to generate, create PDF 417 image in Visual Studio .NET applications.
Listing 15-5: formphp
Code-39 Maker In Visual Studio .NET
Using Barcode generator for .NET Control to generate, create ANSI/AIM Code 39 image in VS .NET applications.
< php echo You have entered $keywords keyword(s)\n ; >
Drawing Bar Code In VS .NET
Using Barcode generation for .NET Control to generate, create barcode image in Visual Studio .NET applications.
This simple PHP script prints out the keywords entered in the keywords field in the HTML form called formhtml For the following request:
Making Data Matrix 2d Barcode In .NET
Using Barcode creator for .NET Control to generate, create DataMatrix image in .NET applications.
http://wwwdomaincom/formphp keywords=makesite
Making GTIN - 8 In VS .NET
Using Barcode creation for .NET framework Control to generate, create EAN 8 image in VS .NET applications.
the script prints:
Drawing ECC200 In C#.NET
Using Barcode encoder for Visual Studio .NET Control to generate, create Data Matrix ECC200 image in .NET framework applications.
You have entered makesite as keyword(s)
Code 128 Encoder In Java
Using Barcode drawer for Java Control to generate, create Code 128 Code Set A image in Java applications.
15 PHP and Apache
Print GTIN - 12 In VS .NET
Using Barcode generation for ASP.NET Control to generate, create Universal Product Code version A image in ASP.NET applications.
Here the variable $keywords is assigned the value makesite because keywords=makesite is the query string passed to the server via the GET method If the Web form s <form action= formphp > line is changed to <form action= formphp method= POST >, then the HTTP POST method will be used and the keywords=makesite data will be read by the PHP module and automatically made available to the script as the value of the script variable $keywords If the Web form has multiple fields, all the fields are turned into script variables that are named accordingly For example, a modified version of simple_formhtml is shown in Listing 15-6
Generating GS1 128 In Java
Using Barcode drawer for Java Control to generate, create EAN 128 image in Java applications.
Listing 15-6: modifed_simple_formhtml
UPC - 13 Generation In C#
Using Barcode drawer for .NET framework Control to generate, create EAN-13 image in Visual Studio .NET applications.
<html> <head> <title>Simple HTML Form</title> </head> <body> <form action= modified_formphp method= POST > <input type= text name= keywords size=30> <select name= case > <option value= lower >Lower case</option> <option value= upper >Upper case</option> <option value= dontcare >Don t Care</option> </select> <input type=submit> </form> </body> </html>
Creating ANSI/AIM Code 128 In VB.NET
Using Barcode generator for Visual Studio .NET Control to generate, create Code 128C image in .NET framework applications.
Here the form has two input fields (keywords and case) When this Web form is submitted via the POST method, the modified_formphp shown in Listing 15-7 receives all the data
EAN128 Encoder In .NET Framework
Using Barcode drawer for ASP.NET Control to generate, create EAN / UCC - 14 image in ASP.NET applications.
Listing 15-7: modified_formphp
UCC-128 Printer In C#
Using Barcode encoder for .NET framework Control to generate, create EAN128 image in .NET applications.
< php print You entered:<br>Keywords: $keywords <br>Case: $case\n ; >
Part III Running Web Applications
For example, when a user enters makesite as the keywords field value and chooses the dontcare case option from the drop-down list, the script (modified_formphp) displays the following:
You entered: Keywords: makesite Case: upper
Creating sessions with PHP
PHP 4 introduced native session management, which makes creating user sessions simple This means that you can track a user as the user moves from one page to another There are two ways to maintain sessions with PHP
Using HTTP cookies to create user sessions
This is the default method To create a session you need to call the session_start() function in your PHP page For example, look at simple PHP page called startphp, which is shown in Listing 15-8
Listing 15-8: startphp
< php session_start(); session_register( count ); $count++; > <html> <head><title>Start Session</title> </head> <body bgcolor= Red > < php echo You have visited this page $count time(s) ; > <p> <a href= /next_pagephp >Next</a> </body> </html>
In the listing you can see two PHP scripts The first script creates a session by calling the session_start() function It also registers a session variable called count by using the session_register() function and increments the variable by one Notice that this script is kept outside the <html> tag This is required because the script sets the session cookie, which is an HTTP header that must come before any contents The above PHP page assumes that you have output_buffering set
15 PHP and Apache
to Off in phpini This is the default setting because output buffering causes PHP pages to be slower If you turn on output buffering by setting output_buffering = On in phpini, you can place the PHP scripts anywhere in the page The second script simply prints the value of $count Now if you load this page using a Web browser for the first time, the session_start() function will create a new HTTP cookie-based session The cookie sent to your Web browser will have attributes similar to the following:
Cookie Name: Domain : Path : Expires : Secure : Data : PHPSESSID 1921681100 / End of session No 3de4aa1f73e33dd8f2c8b8d9f69e442e
The name of the cookie that is sent to the Web browser is PHPSESSID This is the default name set in phpini by using the following line: