I have this command inside my javascript to create a cookie with a specific value.
...
document.cookie="superpage=John Doe;secure=true";
...
My goal: I want the content of this cookie inserted via PHP.
So I tried this: In a separate PHP file i declared
$myvalue = "superpage=John Doe;secure=true";
Then I changed the javascript cookie creation to this:
...
document.cookie= '<?php echo $myvalue; ?>';
...
Cookie is then created but with the value <?php echo $myvalue and not the string I defined via PHP. Any help is highly appreciated.
Put your JavaScript on a page with .php extension and your code will work, .i.e:
file.php
<?php
$myvalue = "superpage=John Doe;secure=true";
?>
then, on the same page, outside the php block:
<script>
document.cookie= '<?php echo $myvalue; ?>';
</script>
There seems to be confusion on how to mix php with javascript. The only way to do so would be with javascript inside a php file:
<?php
php code.....
$myvalue = "superpage=John Doe;secure=true";
echo '
<script>
javascript code....
document.cookie= '.$myvalue.'
</script>';
?>
Related
I have read the following posts, but they are a little over the top for me. I think I'm trying to do something fairly simple, and would like some guidance.
How to pass variables and data from PHP to JavaScript?
passing PHP variables across javascript windows.open to another PHP page
Posting a php variable to a new window
Here is the case:
I have a php script which is very simple, it calls another script and passes 2 variables:
<?php
echo '<script type="text/javascript" language="javascript">
window.open("http://callpage.com/utils/cdr.php?callernum=123456789&calltime=2017-02-22 16:24:12");
</script>';
?>
Note: This is just a "hardcoded" example.
The next script, takes those numbers and builds file/url variable.
Lets say
$file = /var/www/html/file.wav
What I'm trying to do open a new window to the effect of :
http://newpage.com/$file
I have read and found that I think the best use is Javascript, but I can't seem to get my variable into the Javascript.
Here is what I would like to get working:
<?php
$file = /var/www/html/file.wav
echo '<script type="text/javascript" language="javascript">
window.open("http://newpage.com/$file");
</script>';
?>
A few notes:
I don't want to "redirect" the old page, I want it to stay open, and the remote page isn't on the same domain
(one is a.domain.com and the other is b.domain.com).
I don't care about window sizes, etc, its a wav file that I'm expecting the browser to just play with a simple Browser default interface for Wav.
if I understood correctly what you want, you have to concatenate the string with the variable in order to be replaceed
<?php
$file = '/var/www/html/file.wav';
echo '<script type="text/javascript" language="javascript">
window.open("http://newpage.com/'.$file.'");
</script>';
?>
Use string interpolation with double quotes for the echo statement and single quotes everywhere inside the javascript:
echo "<script type='text/javascript' language='javascript'>
window.open('http://newpage.com/$file');
</script>";
The interpolated PHP variable $file should be correctly interpreted as a string and the value it holds should be displayed in the URI of your javascript.
Check out this easy to understand info about variable interpolation http://phppot.com/php/variable-interpolation-in-php/
Here is my "final" code snippet:
$query->execute();
while ($row = $query->fetch(PDO::FETCH_ASSOC))
{
$uid = $row['uniqueid'];
foreach(glob($path. "*". $uid. "*") as $file) {
$link = "http://newpage.com$file";
echo "<script type='text/javascript' language='javascript'>
window.open('$link');
</script>";
}
}
This question already has answers here:
Pass a return value from php to js
(1 answer)
How to access php session in javascript file?
(4 answers)
Closed 6 years ago.
I'm trying to create an image uploading website. In this, when a user logs in, I set a $_SESSION['id'] variable in php. Now, I wish to check if $_SESSION['id'] is set in my javascript file (general.js) in order to carry out certain functions. How should I go about doing it?
<?php $session_value=(isset($_SESSION['id']))?$_SESSION['id']:''; ?>
<html>
<head>
<script type="text/javascript">
var myvar='<?php echo $session_value;?>';
</script>
<script type="text/javascript" src="general.js"></script>
</head>
<body>
</body>
</html>
In above code snippet I have initialized global variable myvar with value stored into php session variable into script file before general.js file is referenced in script.It will be accessible in general.js file
A simple example please try this
<?php
session_start();
$_SESSION['id'] = 12;
?>
<script>
alert(<?php echo $_SESSION['id']; ?>);
</script>
You can even use php variable and array as variable in js like below
<?php
$id= $_SESSION['id'];
$data= array('one', 'two', 'three');
?>
<script type="text/javascript">
var idr = '<?php echo $id; ?>';
var datar = <?php echo json_encode($data); ?>;
</script>
Here PHP is server-Side execution and JavaScript is Client side execution. and $_SESSION is a server-side construct.So probably you can not access that directly using JavaScript You would need to store that variable in $_COOKIE to be able to access it client-side.
You can get that Session using PHP, and then use that for the JavaScript like this
<?php
$variablephp = $_SESSION['category'];
?>
<script>
var variablejs = "<?php echo $variablephp; ?>" ;
alert("category = " + variablejs);
</script>
Here you are getting Session like echo $variablephp using PHP, and the assign that value to JavaScript variable.
The best way is to echo the session ID in a javascript variable.
<script>
var sessionId = "<?php echo $_SESSION['id']; ?>";
// Your javascript code goes here
</script>
I am trying to get a PHP session variable into an external JS file. In the JS file, I want to read and use the value of the session variable, but also assign a new value to the Session variable.
I tried this :
php file:
<?php session_start();?>
<html>
<head>
<title></title>
<script src="testjs.php" type="text/javascript"></script>
</head>
<body>
<?php $_SESSION['Count'] = 1; ?>
</body>
</html>
javascript file:
<?php header("Content-type: application/javascript"); ?>
alert("I am an alert box!");
var test = <?php echo $_SESSION['Count'] ?>;
alert(test);
<?php $_SESSION['Count'] = 2 ?>
test = <?php echo $_SESSION['Count'] ?>;
alert(test);
But I keep getting an empty value and my chrome inspector keeps giving me this error: Uncaught SyntaxError: Unexpected token ; for this line: var test = ;
Help needed :)
You need to start the session in the js(php) file:
<?php
session_start();
header("Content-type: application/javascript"); ?>
alert("I am an alert box!");
var test = <?php echo $_SESSION['Count'] ?>;
alert(test);
<?php $_SESSION['Count'] = 2 ?>
test = <?php echo $_SESSION['Count'] ?>;
alert(test);
This is because the browser makes a separate request to this file, as script tag is not the same as a php include.
NOTE interspersing php and js like this is not a good idea. Although the code above will work, it will blur the mental line between serverside (php) and client side, which can lead to broken code like the following:
var abool = false;
var test = <?php echo $_SESSION['Count'] ?>;
if(abool){
<?php $_SESSION['Count'] = 2 ?>
}
var test = <?php echo $_SESSION['Count'] ?>;
alert(test);
In the above, test will = 2, because the php code is executed before the javascript, so the js if block has zero impact on the php, which is essentially:
<?php
echo $_SESSION['Count'];
$_SESSION['Count'] = 2;
echo $_SESSION['Count'];
Looking at your php file, you have a rogue ; at the end of this line:
<?php $_SESSION['Count'] = 2 ?>;
The output would just be:
;
Move the semicolon and you're fine:
<?php $_SESSION['Count'] = 2; ?>
EDIT: It looks like you're not opening the session in your JS file... You're not using require() or include() so I imagine you should start with session_start() before sending headers.
You need to call session_start(); before you access $_SESSION variables. Reference to "php" file in <script> tag makes another separate request to the server.
http://php.net/manual/en/function.session-start.php
you can't call php code in js file ...
php will work when the file extension is php...
for this you need to do :
create/assign javascript variable/object in php file and access it in js file
I am very new to PHP and JavaScript. I am currently using echo in PHP to run some JavaScript on the page. I need to make a new javascript array and a new variable that are equal to an existing PHP array and variable, so I did this:
var messages = <?php print_r($messages)?>
var list = <?php echo $message['user_name'].': '.$message['text'].' ('.date('d/m/Y H:i:s', $message['date']).')'.'<hr />'; ?>
However, there is a problem caused by my using echo to echo script containing echo. How would I solve this. I would like to echo it because it is only about 4 lines long, so is there an alternative.
Thank you in advance.
Edit: This is the whole JavaScript. It is for a messaging system. $messages is declared from another PHP function, and the basic aim of this code is to 'refresh' the echo every few seconds so that the user can see new messages without having to refresh their page:
echo '<script type="text/javascript">;';
echo 'var messages = <?php print_r($messages)?';
echo 'var list = <?php echo $message['user_name'].': '.$message['text'].' ('.date('d/m/Y H:i:s', $message['date']).')'.'<hr />'; ?>';
echo 'setInterval(function(){console.log("hello")},3000);';
echo '</script>';
Not getting what you want,but if you want to use php array in javascript than make it javascript array
<script>
<?php $test_arr = array('apple','banana','mango');?>
var js_array = <?php echo json_encode($test_arr);?>;
</script>
output
<script>
var js_array = ["apple","banana","mango"];
</script>
Your Javascript will execute on the client, not on the server. This means that foo is not evaluated on the server side and therefore its value can't be written to a file on the server.
The best way to think about this process is as if you're generating a text file dynamically. The text you're generating only becomes executable code once the browser interprets it. Only what you place between <?php tags is evaluated on the server.
By the way, making a habit of embedding random pieces of PHP logic in HTML or Javascript can lead to seriously convoluted code. I speak from painful experience.
I need to send result from my PHP file to the JavaScript function/file.
I found some of answers like: var x='<?php echo $pathinfo; ?>';
or this:
myHtmlFile.html:
<script type="text/javascript" src="jquery-1.8.1.js"></script>
<script type="text/javascript" src="newEmptyPHP.php"></script>
<script language="javascript">
function test()
{
alert(result);
}
</script>
newEmptyPHP.php:
<?php
$res="it is result";
echo "var result = ".json_encode($res).";";
?>
My question is whether there is way return value from php function and not from php file.
something like this:
<?php
function phpFunction(){
$res="it is result";
return $res;
}
?>
I need simple PHP/JavaScript code without something complex.
I want keep many function in one php file and not many php files.
<?php
function phpFunction(){
$res="it is result";
return $res;
}
?>
<script>
var result = "<?php echo phpFunction() ?>";
</script>
The above method will work. However, if you want more PHP/JS combined scripts, learn AJAX.
The best way to get your data to JavaScript from PHP is to use AJAX using jQuery you have declared.
You can use $.get()
You can call you php script which contains the function with parameters in you url request.
And when a specific parameter is specified in the url, then you can call you fonction and echo whatever you want to the javascript.
Have a good day!
You can open as many php tags as you wish inside your one php document. You can then either make this php document separate from your main document (however this would require making the main document in php and using a "php include" or "php require") or you can simply just open and close php tags as necessary. You do not even have to close the line at the end of the php, for example.
<?php if (a==a) { ?>
<div>
<script>
<?php echo 'do something here'; ?>
</script>
</div>
<?php } ?>
Using the above example can provide some unique results. Just remember that anything you do with php you can just echo out the result and slot it into the middle of your javascript.