Specifying Input Values for Checkboxes in PHP

Q

How To Specify Input Values for Checkboxes in PHP?

✍: FYIcenter.com

A

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 button not pushed, this field will not be submitted.
As a group of multiple selections - Multiple <INPUT TYPE=CHECKBOX ...> tags with the same field name with different input values specified in the "value" attribute. When submitted, input values that associated with checked boxes will be submitted.

The sample PHP script page below is a modified version of submit_comments.php that has one group of multiple checkboxes and single switch:

<?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>Site Visited:</td><td>"
    ."<input type=checkbox name=site value=dev>Dev FYI Center &nbsp;"
    ."<input type=checkbox name=site value=sqa>SQA FYI Center &nbsp;"
    ."<input type=checkbox name=site value=dba>DBA FYI Center &nbsp;"
    ."</td></tr>\n");
  print("<tr><td>Like Site:</td>"
    ."<td><input type=checkbox name=rate></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 = Peter
  site = dba
  rate = on
  comment = All good sites

But there is a problem with script in processing_forms.php. It picks up only one of the input values selected from the checkbox group. See the next tip for solutions.

⇒ Retrieving Input Values from Checkboxes in PHP

⇐ Specifying Input Values for Radio Buttons in PHP

⇑ Processing Web Forms in PHP

⇑⇑ PHP Tutorials

2016-11-13, ∼2030🔥, 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, ∼4652🔥, 1💬

💬 2022-12-14 /nme: /data

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, ∼3048🔥, 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, ∼2205🔥, 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, ∼2124🔥, 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, ∼2117🔥, 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, ∼2031🔥, 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, ∼2014🔥, 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, ∼1974🔥, 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, ∼1929🔥, 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.