Getting User Input in Arrays


It is easy to organize the data sent to you from an HTML form into a single array. For example, say you wanted to ask the user’s name and age. You could store those items in an array named $data, as $data['name'] and $data['age']. You could create those array entries like this in formarray.html:

 <html>   <head>     <title>       Using form arrays     </title>   </head>   <body>     <center>       <h1>         Using form arrays       </h1>       <form method="post" action="formarray.php">         Enter your name:         <input name="data[name]" type="text">         <br>         <br>         Enter your age:         <input name="data[age]" type="text">         <br>         <br>         <input type="submit" value="Submit">       </form>     </center>   </body> </html>

In formdata.php, you can get the $data array like this:

 <html>   <head>     <title>       Reading form data in arrays     </title>   </head>   <body>     <center>       <h1>         Reading form data in arrays       </h1>       Your name is       <?         $data = $_REQUEST['data'];         .         .         .       ?>     </center>   </body> </html>

Now you can access the user’s name as $data['name']. Here’s how to do that and get the user’s age as well, echoing them to the browser:

 <html>   <head>     <title>       Reading form data in arrays     </title>   </head>   <body>     <center>       <h1>         Reading form data in arrays       </h1>       Your name is       <?         $data = $_REQUEST['data'];         echo $data['name'], "<br>";       ?>       Your age is       <?         $data = $_REQUEST['data'];         echo $data['age'], "<br>";       ?>     </center>    </body> </html>

You can see formarray.html, with the two text fields, in Figure 14.5.

image from book
Figure 14.5: The formarray.html page

In Figure 14.6, you can see the text recovered from those text fields in formarray.php, where the application has been able to read the text from the $data array.

image from book
Figure 14.6: The formarray.php application

You’ve gotten some good expertise with PHP now, but each application so far has relied on two pages: an HTML starting page, and a PHP page that handles user input. Can’t you do everything in a single PHP page?



Ajax Bible
Ajax Bible
ISBN: 0470102632
EAN: 2147483647
Year: 2004
Pages: 169

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