set default check in a 'checkbox' form

Working with a form that generates checkbox options from a database. I want to set a default option as checked (ticked).

Does anyone know if i can do it or how to do it.

 

when you are writing the checkbox - create a variable before it that is equal to "" then do an if statement to see if it should be checked. If it is - then set your variable = " checked "

then when you write your (x)html just enter that variable which is either equal to "" or equal to " checked "

 

// DB pull
$query = mysql_query("select value FROM ...");
$checked;
if ($row = mysql_fetch_assoc($query))
{
    if (isset($row['value']))
    {
        $checked = "checked";
    }
}
<input type="checkbox" name="value" id="value" {$checked}>

PHP:

 

Use the following, obviously change to suit:

<input type="checkbox" name="chkName" id="chkName" <?= ( isset($row[0]) ? ' checked="checked"' : '') ?> />

PHP:

or if you need the form to remember the values of a checkbox (or any other field)

<input type="checkbox" name="chkName" id="chkName" <?= ( isset($_REQUEST['chkName']) ? ' checked="checked"' : '') ?> />

PHP: