Input Values of SELECT Tags in PHP

Q

What Are Input Values of SELECT Tags in PHP?

✍: FYIcenter.com

A

SELECT tags are used in forms to provide dropdown lists. Entries in a dropdown list are defined by OPTION tags, which can provide input values in two ways:

Implicit value - Provided as <OPTION>input_value</OPTION>, where input_value will be used as both the dropdown entry and the input value if this entry is selected.
Explicit value - Provided as <OPTION VALUE=input_value>display_value</OPTION>, where display_value will be used as the download entry, and input_value will be used as the input value if this entry is selected.

The sample PHP script page below is a modified version of submit_comments.php that has one SELECT tag named as "job" using implicit input values and another SELECT tag named s "site" using explicit input values:

<?php
  print("<html><form action=processing_forms.php method=post>");
  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>Your Job Title:</td>"
    ."<td><select name=job>"
    ."<option>Developer</option>"
    ."<option>QA Engineer</option>"
    ."<option>DBA</option>"
    ."<option>Other</option>"
    ."</select></td></tr>\n");
  print("<tr><td>Rate This Site:</td>"
    ."<td><select name=rate>"
    ."<option value=3>Good</option>"
    ."<option value=2>Average</option>"
    ."<option value=1>Poor</option>"
    ."</select></td></tr>\n");
  print("<tr><td>Comments:</td>"
    ."<td><input type=text name=comment></td></tr>\n");
  print("<tr><td colspan=2><input type=submit><td></tr></table>\n");
  print("</form></html>\n");
?>

If you submit the form with this page, you will get something like this:

Number of values: 4
  name = Joe
  job = Developer
  rate = 3
  comment = I like it.

⇒ Specifying Input Values for Radio Buttons in PHP

⇐ Listing All Values of Submitted Fields in PHP

⇑ Processing Web Forms in PHP

⇑⇑ PHP Tutorials

2016-11-13, 1275👍, 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, 2811👍, 1💬

💬 2022-12-14 /nme: /data

Using isset($_REQUEST('name')) in PHP
How To Avoid the Undefined Index Error in PHP? If you don't want your PHP page to give out errors as shown in the previous exercise, you should consider checking all expected input fields in $_REQUEST with the isset() function as shown in the example script below: <?php if (isset($_REQUEST['n... 2016-11-15, 2002👍, 0💬

Input Values of SELECT Tags in PHP
What Are Input Values of SELECT Tags in PHP? SELECT tags are used in forms to provide dropdown lists. Entries in a dropdown list are defined by OPTION tags, which can provide input values in two ways: Implicit value - Provided as <OPTION>input_va lue</OPTION>,where input_... 2016-11-13, 1276👍, 0💬

Specifying Input Values for Checkboxes in PHP
How To Specify Input Values for Checkboxes in PHP? Checkboxes can be used in a form for two situations: As a single switch - One <INPUT TYPE=CHECKBOX ...> tag, with no input value specified. When submitted with button pushed down, you will receive a value of "on". When submitted with b... 2016-11-13, 1261👍, 0💬

Expected Input Field Not Submitted in PHP
What Happens If an Expected Input Field Was Not Submitted in PHP? Obviously, if an expected input field was not submitted, there will be no entry in the $_REQUEST array for that field. You may get an execution error, if you are not checking the existence of the expected entries in $_REQUEST. For exa... 2016-11-15, 1242👍, 0💬

Retrieving Submitted Form Data in PHP
How To Retrieve the Submitted Form Data in PHP? The best way to retrieve the form data submitted by your visitor is to use the $_REQUEST array. The keys in this array will be the field names defined in form. The values in this array will be the values entered by your visitor in the input fields. The... 2016-11-15, 1235👍, 0💬

Specifying Input Values for Radio Buttons in PHP
How To Specify Input Values for Radio Buttons in PHP? Radio buttons can be used in a form for two situations: As a single switch - One <INPUT TYPE=RADIO ...> tag, with no input value specified. When submitted with button pushed down, you will receive a value of "on". When submitted wit... 2016-11-13, 1221👍, 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, 1221👍, 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, 1185👍, 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.