I want to put an alert inside an if (in a php document) with other actions. The other actions works fine but not the alert. Can anybody help me?. This is where the alert is:
if(empty($response)){
//SOME ACTIONS
echo '<script type='text/javascript'> alert("Message´s 1st line\nMessage´s 2nd line");</script>';
//SOME ACTIONS
header('Location: SOMEWEBSITE');
}else{
//ANOTHER ACTION
}
All actions works fine except for the alert. I tried on different browsers but the alert doesnt appear.
Sorry for my english
Thank you all.
It would be better if you use below mentioned code.
if(empty($response)){
//SOME ACTIONS
?>
<script type="text/javascript"> alert("Message´s 1st line\nMessage´s 2nd line");</script>
<?php
//SOME ACTIONS
header('Location: SOMEWEBSITE');
}else{
//ANOTHER ACTION
}
First thing is to fix quotes.
Second thing is remove header() call
http://php.net/manual/en/function.header.php
Remember that header() must be called before any actual output is sent, either by normal HTML tags, blank lines in a file, or from PHP.
And don't use location header for 200 response
https://en.wikipedia.org/wiki/HTTP_location
Yes fix your quote.
The bellow code should work which you tried if you don't use redirection.
echo '<script language="javascript">alert("message");</script>';
You can't expect alert where you redirecting to another page from php. If you use javascript redirection, then it can be work. Replace redirection line with something like
echo '<script language="javascript">window.location = "http://SOMEWEBSITE.COM";</script>';
Try This echo '<script type="text/javascript">alert("Message´s 1st line\nMessage´s 2nd line");</script>'
echo "<script type='text/javascript'> alert('Message´s 1st line\nMessage´s 2nd line');</script>";
The code that you wrote the echo was terminating after
type='
Related
What is the easiest way to run Javascript code inside PHP, preferably without using external libraries? Specifically, I need the innerHTML of a div to change depending on some calculations performed using the user's form inputs that were captured earlier with $_POST in a separate form. How can I get the following JS code to run inside the following PHP code? (My most basic attempt was using echo command, but it's throwing up errors)
HTML:
<div id="output">
</div><!--#output -->
PHP (desired JS included):
if (count($valid_locations)<$num_of_locations){
echo '<script>const output = document.querySelector("#output");</script>;';
echo '<script>output.innerHTML = "<div class="alert-danger"> Trip unable to be created. Please adjust the budget/number of travelers/duration etc.</div>;";</script>';
}else{
createTrip($trips);
}
Right now, the IF condition is True and the code does run, but it echos ";" for some reason. I have verified that the condition is met and it runs by adding in a simple echo "this runs";, which did appear upon refresh. I just don't understand why it's outputting to the default echo space and the script isnt running to change the innerHTML of the output div. Is this even possible to do with PHP? If so, what's the best way? (doesn't need to be secure, won't be used publicly). I've heard of a few things such as ajax but it seems so complicated. Any explanations on stuff like that specific to this scenario would be greatly appreciated.
Following up on the comments, you don't need JS to achieve what you want. You could just use PHP
<?php
$output = null;
if (!empty($_POST)) {
//...
//... do stuff
//...
if (count($valid_locations)<$num_of_locations){
$output = 'Error occured - bla bla bla';
}
}
?>
<!DOCTYPE html>
<html>
<head>
</head>
<body>
<?php if (isset($output)) {?>
<div id="output"><?= $output; ?></div>
<?php } ?>
</body>
</html>
So my main page loads other php pages into it with click of a button so it can be a single page website without having to load all the content at once.
index.php
<?php
session_start();
?>
<head>
$('#btnPetShop').one( "click", function(){
$( "#page_shop" ).load( "shop.php" );
});
</head>
<body>
<?php
echo session_status();/----Always returns 1, no matter if logged in or not----/
if(isset($_SESSION['admin']))
{
if($_SESSION['admin']==1)
{
/----this part works, I am logged in as admin----/
}
}
?>
<div id="page_shop"></div>
</body>
shop.php
<?php
if(isset($_SESSION['admin']))
{
if($_SESSION['admin']==1)
{
}
else{}
}
else{} <----I end up here as if $_SESSION['admin'] is not set----/
/----code entered here loads fine----/
?>
The idea is to make a delete and edit button (if you are logged in as admin) on every article in shop.php.
Problem is that $_SESSION['admin'] is recognized on index.php, but not inside shop.php
I tried typing the content of shop.php directly into and it works, the problem is that i want it to load with a click of a button.
Where ever ( in any PHP page) if you want to use any Session variable then you have to first declare session_start(); so, in your case if you have $_SESSION['admin']="User1234" on index.php and if you want to use value of $_SESSION['admin'] in shop.php then you have to again declare session_satart(); and then use it. For example, If let consider that index.php has session variable $_SESSION['admin']="User1234" and now you want to print "Welcome User1234" on shop.php then you can do it as shown below.
index.php
<?php
session_start();
$_SESSION['admin'] = "User1234";
?>
Shop.php
<?php
session_start();
echo "Welcome, ". $_SESSION['admin']
?>
Output:
Welcome, User1234
You need to add session_start(); in each page that needs access to the session data.
See: http://php.net/manual/en/function.session-start.php
EDIT
Since the solution mentioned in my original answer does not work for you and session_status() returns 1 in your code, it means sessions are enabled on your server. There is only one thing left which could explain that your sessions are lost:
You are loading shop.php with an AJAX request, is the URL exactly in the same domain as index.php? Try to add the full path before shop.php to see if this solves the issue.
Just to be clear, if your index.php runs on http://localhost/test/index.php, your new code will be:
$( "#page_shop" ).load( "http://localhost/test/shop.php" );
Well okay, I feel dumb... I found the solution.
I had this as a script
$('#btn_logout').click(function(){
<?php session_destroy();?>
});
This is a big no no and if you do this you should be ashamed
The architecture I use to load contents onto a common area on the web page is as below
I have a java script function within the form as shown below called javaScriptFunc which never gets invoked.
Is it possible to invoke a java script function within a form?
Please do let me know if more clarity is needed. I'll try to clarify. I'm stuck with this for a while now. I'd appreciate any help please
I think you are missing some PHP tags if I understand what you are trying to do correctly. Try this:
<form method="post" action="" id='somdId'>
<?php
require_once 'some_php_file.php';
if (isLoggedIn()) {
// Some PHP code here
?>
<script>
javaScriptFunc(<?php echo formatJson(someArgs); ?>);
</script>
<?php
}
?>
Not very clear what you want. You need to echo the script like this
echo ("<script type='text/javascript'>javaScriptFunc(" . formatJson(someArgs) . ");</script>");
provided you have already defined the function javaScriptFunc somewhere else in script.
For some reason, I the JS function doesn't seem to fire from within a form. I've worked around by re-writing the load logic to load the whole PHP page instead of a form. just a different way of doing things.
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 have this part of my script
<?php
else:
?>
<script>
alert("You are not allowed to edit this CV!");
</script>
<?php
echo '<meta http-equiv="refresh" content="1"; url="'.$the_class->settings[0]['DomainName'].'myresume.php"';
endif;
?>
the objective is, after the alert box popped-out and the "ok" button was clicked,
the user should be redirected to http://www.mydomain.com/myresume.php
now the problem is, before the page loads the redirection, the alert box keeps popping out without reaching the destination page at all...how to fix this ?
You can do something like this if you want to always send them back to http://www.mydomain.com/myresume.php:
<script>
alert("You are not allowed to edit this CV!");
window.location.href = 'http://www.mydomain.com/myresume.php';
</script>
You can do something like this if you instead want to send them back to whatever page they were on previously:
<script>
alert("You are not allowed to edit this CV!");
history.back();
</script>
the problem seems to be that you are trying to set a header after sending content.
You can try using the header function. If that does not work, you can simply remove the alert.
If you need to display the alert you can put a window.location in the script tag and remove the php part.
You can also experiment by turning the output buffering off using ob_implicit_flush.
How about sending them back using javascript:
<?php
else:
?>
<script>
alert("You are not allowed to edit this CV!");
document.location =
<?php
echo '"'.$the_class->settings[0]['DomainName'].'myresume.php"';
?>
;
</script>
<?php
endif;
?>