Generating and Processing Form with the Same Script in PHP

Q

How To Generate and Process a Form with the Same Script in PHP?

✍: FYIcenter.com

A

In previous exercises, a Web form is generated by one script, and processed by another script. But you could write a single script to do both. You just need to remember to:

Use same script name as the form generation script in the "action" attribute in the <FORM> tag.
Write two sections in the script: one for form generation, the other for form processing.
Check one expected input to determine which section to use.

The PHP script below shows you a good example:

<?php
  if (!isset($_REQUEST['submit'])) {
    generatingForm();      
  } else {
    processingForm();      
  }
function generatingForm() {
  print("<html><form action=submit_comments.php method=post>");
  print("<input type=hidden name=module value=FAQ>\n");
  print("<table><tr><td colspan=2>Please enter and submit your"
    ." comments about FYICenter.com:</td></tr>");
  print("<tr><td>Your Name:</td>"
    ."<td><input type=text name=name></td></tr>\n");
  print("<tr><td>Comments:</td>"
    ."<td><input type=text name=comment size=40>"
    ."</td></tr>\n");
  print("<tr><td colspan=2>"
    .'<input type=submit name=submit value="Submit">'
    ."<td></tr></table>\n");
  print("</form></html>\n");
}
function processingForm() {
  print("<html><pre>");
  $count = count($_REQUEST);
  print("Number of values: $count\n");
  foreach ($_REQUEST as $key=>$value) {
    if (is_array($value)) {
      print("  $key is an array\n");
      for ($i = 0; $i < count($value); $i++) {
         $sub_value = $value[$i];
         if (get_magic_quotes_gpc()) {
           $sub_value = stripslashes($sub_value);
         }
         print("    ".$key."[".$i."] = ".$sub_value."\n");
      }
    } else { 
      if (get_magic_quotes_gpc()) {
        $value = stripslashes($value);
      }
      print("  $key = $value\n");
    }
  }
  print("</pre></html>\n");
}
?>

If you save this script as submit_comments.php on your Web server, and submit this form, you will get something like this:

Number of values: 4
  module = FAQ
  name = Ray
  comment = Good site for beginners.
  submit = Submit

⇒ Submitting Values without Using a Form in PHP

⇐ Supporting Hidden Form Fields in PHP

⇑ Processing Web Forms in PHP

⇑⇑ PHP Tutorials

2016-11-08, ∼2762🔥, 0💬

Removing Slashes on Submitted Input Values in PHP
How To Remove Slashes on Submitted Input Values in PHP? By default, when input values are submitted to the PHP engine, it will add slashes to protect single quotes and double quotes. You should remove those slashes to get the original values by applying the stripslashes() function. Note that PHP eng... 2022-12-14, ∼4998🔥, 1💬

💬 2022-12-14 /nme: /data

Submitting Values without Using a Form in PHP
How To Submit Values without Using a Form in PHP? If you know the values you want to submit, you can code the values in a hyper link at the end of the URL. The additional values provided at the end of a URL is called query string. There are two suggestions on how to use query strings to submit value... 2016-11-08, ∼3854🔥, 0💬

Supporting Hidden Form Fields in PHP
How To Support Hidden Form Fields in PHP? Hidden fields are special fields in a form that are not shown on the Web page. But when the form is submitted, values specified in the hidden fields are also submitted to the Web server. A hidden field can be specified with the <INPUT TYPE=HIDDEN ...&... 2016-11-08, ∼3314🔥, 0💬

Supporting a Multiple-Page Form in PHP
How To Support Multiple-Page Forms in PHP? If you have a long form with a lots of fields, you may want to divide the fields into multiple groups and present multiple pages with one group of fields on one page. This makes the a long form more user-friendly. However, this requires you to write good sc... 2016-11-05, ∼2834🔥, 0💬

Understanding and Managing Cookies in PHP
Where to find tutorials on how to manage Cookies in PHP? A collection of tutorials to answer many frequently asked questions how to manage Cookies in PHP. Clear explanations and tutorial exercises are provided on setting and receiving cookies, creating and removing persistent cookies, specifying dom... 2016-11-05, ∼2805🔥, 0💬

Generating and Processing Form with the Same Script in PHP
How To Generate and Process a Form with the Same Script in PHP? In previous exercises, a Web form is generated by one script, and processed by another script. But you could write a single script to do both. You just need to remember to: Use same script name as the form generation script in the "acti... 2016-11-08, ∼2763🔥, 0💬

Supporting Multiple Submit Buttons in PHP
How To Support Multiple Submit Buttons in PHP? Sometimes, you may need to give visitors multiple submit buttons on a single form to allow them to submit the form for different purposes. For example, when you show your customer a purchase order in a Web form, you may give your customer 3 submit butto... 2016-11-08, ∼2445🔥, 0💬

Providing Default Values for Text Fields in PHP
How To Supply Default Values for Text Fields in PHP? If you want to provide a default value to a text field in your form, you need to pay attention to following notes: The default value should be provided in the 'VALUE=default_value' attribute in the <INPUT TYPE=TEXT ...> tag. The leng... 2016-11-13, ∼2369🔥, 0💬

Retrieving Input Values from Checkboxes in PHP
How To Retrieve Input Values for Checkboxes Properly in PHP? If multiple input values are submitted with the same field name, like the case of a group of checkboxes, you should add ([]) to the end of the field name. This tells the PHP engine that multiple values are expected for this field. The engi... 2016-11-13, ∼2145🔥, 0💬

All rights in the contents of this web site are reserved by the individual author. fyicenter.com does not guarantee the truthfulness, accuracy, or reliability of any contents.