HTML:
<div id="signUpError"></div>
JS:
<script type="text/javascript">
function showSignUpError(message) {
document.getElementById('signUpError').innerHTML="<div class='alert alert-danger'>"+message+"</div>";
}
</script>
PHP:
$error="this is error"
How to call showSignUpError($error)
Try this code:
showSignUpError(<?php echo $error; ?>);
Try that first, but it might be necessary to quote the text:
showSignUpError("<?php echo $error; ?>");
Note that this will only run once, on page load.
If you wish to call-out to the PHP code while interacting with user, then you should check out AJAX:
AJAX request callback using jQuery
Related
I have an ajax call to an external php file "commentS.php" that refreshes every 3 seconds. However. I expected to just use the variable in the hidden input field (name="idd") and expected it to just reflect on the "commentS.php", but, it does not. What I want to achieve is to have the variable "idd" echoed on the "commentS.php" page as a variable to be used in a mysql query. I did the document write on the commentS.php but it just shows a white page with the variable number that is "idd" when the ajax call is made.
<input type="hidden" name="idd" value="<?php echo $row['story_id']; ?>">
<script type="text/javascript" src="jquery-3.3.1.min.js"></script>
<script type="text/javascript">
var named = "<?php echo $idd; ?>";
$(document).ready(function() {
setInterval(function () {
$('#content').load('commentS.php')
}, 3000);
});
</script>
Any help would be great, a read, anything.
I am very new to js and ajax altogether. thanks
Try this :
$('#content').load('commentS.php?idd=<?php echo $idd; ?>')
In commentS.php you have to do this in the beginning :
$idd = $_GET['idd']
I have got a form on my WordPress homepage that takes one input.
<form method='post' action='<?php bloginfo('url'); ?>/test123/' >
Name: <input type="text" name="name" required="required">
<input type="submit">
</form>
When submitted it redirects and passes the input to the test123 page (the page has a custom php template). If I add Hello <?php echo $_POST["name"]; ?> then it works without issue.
However, I have a JavaScript function that should run after the submit button is clicked. The users input name needs to be used inside the function.
My first thought was to use onclick="test();" but I don't believe that will work for calling the function on a different page, and I still have the issue of passing the PHP data into the JS function.
I've tried using <script type="text/javascript> .... </script> in test123 page's php template file with no luck.
Edit:
<?php /* Template Name: test123 */ ?>
<?php get_header(); ?>
Your email is <?php echo $_POST["email"]; ?>
<script type="text/javascript>
function testing() {
console.log(<?php echo $_POST["email"]; ?>)
}
testing();
</script>
<?php get_footer(); ?>
If you using jQuery in Wordpress
$('form').submit(function(e){
var name = $(this).find('input[name=name]').val();
// do smth with name
return true;
});
i'm trying to call a javascript function after form submit and having any error then i want this script to run but this code is not working.I'm new in PHP Please help
if(!empty($varAccountType))
{
<?php
if($varAccountType=='Free Account')
{
echo "inside $varAccountType"; //this line is working
echo '<script type="text/javascript">OnSelectionAcctType(Free Account);</script>';
//only this is not calling//
}
?>}
please help..
Thanks in Advance
can you try by passing like below
echo '<script type="text/javascript">OnSelectionAcctType("Free Account");</script>';
Hi I am creating a website with a login section this is working I am using HTML and PHP. What I am trying to do is one of my pages has a html button I want this to be disabled for certain users. at the moment this is what I have got.
this is the part that I use for the login details.
<?php
session_start();
$_SESSION["username"];
$_SESSION["password"];
$_SESSION["access"];
?>
I have got if statments that I am currently using which are
if($_SESSION["access"] == "Administrator"){
echo $Admin;
}
what I am trying to do is call a javascript function within a PHP if statement what i have got so far is
<?php
if($_SESSION["access"] == "Consumer")
{
echo '<script type="text/javascript">
Disable();
</script>';
}
if($_SESSION["access"] == "Administrator")
{
echo '<script type="text/javascript">
Enable();
</script>';
}
?>
the javascript functions that i am trying to call are
<script type="text/javascript">
function Enable() {
SubmitButton.disabled = false;
}
function Disable() {
SubmitButton.disabled = true;
}
</script>
I have also tryed
if($_SESSION["access"] == "Consumer")
{
echo "<script> Disable(); </script>";
}
Im just wondering if I have typed something in wrong or if I have forgotten to put something in.
any help would be much appreciated.
Looking at your code you have couple of issues:
Mixing your PHP logic and pure HTML is (usually) not a good idea.
Instead I would suggest you move your access checking logic fully on the server side and display the button accordingly (disabled or enabled) based on the user's access.
Example:
<?php if($_SESSION['access']): // Only show the button for users with access ?>
<button type="submit" value="Submit" <?php echo ($_SESSION['access'] != 'Administrator' ? 'disabled' : ''); // Button disabled for everyone but administrators ?> />
<?php endif; ?>
And let me point out the obvious (as mentioned by the other answers), that's not 100% bulletproof. The user can still manually submit the button even if he is not an administrator by editing the page's HTML on the fly. That's just a UI fix. The real check should be done on the server side once the button is submitted (e.g. is the user logged in, does he have a cookie on his computer that identifies him as an administrator, does he have a session cookie set, etc).
Calling JS in random places, e.g. in the header can have unexpected consequences.
You better wait for the page to be loaded fully before calling any JS functions. You can do that via jQuery easily, but make sure you include the jQuery library before that in your header like so.
Afterwards you can call any JS after the page is loaded by placing them within the following block:
$(function(){
// Place your JS calls here, e.g. call to Enable()
});
String concatenation in PHP is done with a dot . and strings can be multiline
This code which you used is just plain wrong.
echo '<script type="text/javascript">'
, 'Enable();'
, '</script>';
You should use something like:
echo '<script type="text/javascript">'
.'Enable();'
. '</script>';
or better:
echo '<script type="text/javascript">
Enable();
</script>';
PHP doesn't use , sign for joining. Use ..
But otherwise it should work, except that you should define SubmitButton in advance of using it.
<?php
echo "<script type='text/javascript'>";
// if the id of your element is "submitButton"
echo "var submitButton = document.getElementById('submitButton');";
echo " function disable(){ submitButton.disabled=true; }";
echo "</script>";
?>
After that you can use it as you did..
<script type='text/javascript'>
disable();
</script>
Just be advised that denying access to some elements/functionality on your webpage with JavaScript alone is not a good practice - JavaScript is executed locally on the user's computer and therefore the user can modify it to gain an advantage.
Well, the problem may be that you're trying to call the javascript function before the HTML is ready (or finally rendered), so the browser, when executes the function doesn't find the button.
You could solve this placing your javascript code at the end of your page, or using jQuery and doing:
$(document).ready(function() {
<%php if ($_SESSION['access'] == 'xxxxx') {%>
Enable();
<%php } else { %>
Disable();
<%php } %>
});
Anyway, ALWAYS check user permissions on the server side, because someone could enable the button using Firebug or something else...
I'm using easyModal to create modal windows in my web. Saw that they have callback onClose and I want use php code on close is it possible, if yes How to do that? I want to unset some values from sessions (don't have much experience in javascript, jquery or ajax)
This is my code:
<div id="ebox">
<?php
echo $_SESSION['unameE'];
echo $_SESSION['pwordE'];
echo $_SESSION['emailE'];
?>
</div>
$(function() {
$('#ebox').easyModal( {
autoOpen:<?php echo $error; ?>
onClose:???
});
});
Or maybe there is another solution that unsets values from session after displaying it once?
on your script you should have :
onClose: function(){
$("#ebox").html(' ') ;
$.post("remove-session.php");
}
and then on the page "remove-session.php" you can do all sort of stuff with your session:
<?php
unset($_SESSION['unameE']);
//...
//or even
session_destroy();
?>