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PHP Tutorials - Input Values of SELECT Tags

By: FYICenter.com

(Continued from previous topic...)

What Are Input Values of SELECT Tags?

SELECT tags are used in forms to provide dropdown lists. Entris 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.

(Continued on next topic...)

  1. How To Create a Web Form?
  2. What Are Form Input HTML Tags?
  3. How To Generate a Form?
  4. Where Is the Submitted Form Data Stored?
  5. How To Retrieve the Submitted Form Data?
  6. What Happens If an Expected Input Field Was Not Submitted?
  7. How To Avoid the Undefined Index Error?
  8. How To List All Values of Submitted Fields?
  9. What Are Input Values of SELECT Tags?
  10. How To Specify Input Values for Radio Buttons?
  11. How To Specify Input Values for Checkboxes?
  12. How To Retrieve Input Values for Checkboxes Properly?
  13. How To Supply Default Values for Text Fields?
  14. How To Remove Slashes on Submitted Input Values?
  15. How To Support Multiple Submit Buttons?
  16. How To Support Hidden Form Fields?
  17. How To Generate and Process a Form with the Same Script?
  18. How To Submit Values without Using a Form?
  19. How To Retrieve the Original Query String?
  20. How To Protect Special Characters in Query String?
  21. How To Support Multiple-Page Forms?

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