PHP和MySQL检查了复选框问题

Question

I'm trying to check if the checkbox has been checked and display the check mark for the user to see when they check there account settings. I want to know how can I fix this problem using PHP so that the check mark is displayed every time the user views their account settings?

Here is the HTML.

<input type="checkbox" name="privacy_policy" id="privacy_policy" value="yes" />

Answer 1

Do you mean which attribute do you set so that the checkbox is checked?

<input type="checkbox" name="privacy_policy" id="privacy_policy" value="yes" checked="checked" />

EDIT: What I would do, is bind some code to the checkbox's click event (using a library like jQuery), like the following:

$(document).ready(function() {
    $("#privacy_policy").click(function() {

        // block the checkbox
        $(this).attr("disabled", "disabled");
        var checked = 0;
        if($(this).is(":checked")) {
            checked = 1;
        }

        // send the checked state to PHP script
        // if the update has been successful, the script echos a '1'
        $.post('account.php', { checked: checked, function(resp) {

            // update has been successful
            if(resp == 1) {

                // unblock the checkbox, the current 
                // checked state reflects the stored value
                $(this).removeAttr("disabled");
            } else {
                alert("settings could not be updated");
            }
        });

    });
});

That will handle the real-time manipulating of that particular option's setting every time the checkbox is clicked. (I think that's what you meant, anyway). You just need to act on the $_POST['checked'] variable internally.

To set up the initial state of the checkbox based on a stored value (the first time the page loads), just use short tags, e.g.:

<?php
$isChecked = $_SESSION['someSetting']; // 1 or 0, for example
?>
<input type="checkbox" name="privacy_policy" id="privacy_policy" value="yes" <?php if($isChecked) echo 'checked="checked"'; ?>/>