Server Validation - Repopulating Checkbox Array

Hi WA,

I have a form with a checkbox array. Nothing fancy, just some checkboxes named Checkbox[]

The form has Server Side validation on it.

How easy (or not) is it to get these repopulated should the validation of the form fail?

Is it a quick task or slightly more involved?

Cheers
Ian

it's not a quick task, it is definitely more involved and requires hand coding.

first, a multiple checkbox like this will pass the selected values using an array. to validate the checkboxes, the array needs to be converted to a comma separated string.

add the following code at line 1 to do that:

<?php

if($_SERVER["REQUEST_METHOD"] == "POST")     {

    foreach($_POST as $key => $val) {

        if(is_array($_POST[$key])) $_POST[$key] = implode(", ", $_POST[$key]);

    }

}

?>

when validation fails, the validated entries code for the checkbox (yours may look different):

<?php echo(ValidatedField("pagename","Checkbox")) ?>

will give us a comma separated list of the checked items, we need to convert that back to an array by adding the following code just before the form tag

<?php $selected = explode(", ", ValidatedField("untitled4","Checkbox")); ?>

then in each checkbox, we can use the in_array function to see if that checkbox value is in the array, for example:

<input type="checkbox" name="Checkbox[]" value="1" <?php if(in_array("1", $selected)) echo("checked=\"checked\""); ?> id="CheckboxGroup1_0" />

      Checkbox</label>

    <br />

    <label>

      <input type="checkbox" name="Checkbox[]" value="2" <?php if(in_array("2", $selected)) echo("checked=\"checked\""); ?> id="CheckboxGroup1_1" />

      Checkbox</label>

    <br />

    <label>

      <input type="checkbox" name="Checkbox[]" value="3" <?php if(in_array("3", $selected)) echo("checked=\"checked\""); ?> id="CheckboxGroup1_2" />

This post has been deleted.

Hi Jason,

I just wanted to let you know that thanks to your clear explanation and helpful code snippets that I was able to resolve my issue very quickly indeed!

Thanks as always!

Cheers
Ian

glad to hear it is working.