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.
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>";
}
}
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>';
?>
Is it possible to run a JavaScript function from PHP using an Ajax call.
For example, if I have a html page in php with an ajax call. The ajax post gets sent to a php engine:
index.php
<script>
Ajax.post('http://example.com/ajaxEngine.php', { data: "someData" });
</script>
Then in the PHP engine, can I run a JavaScript function like this:
ajaxEngine.php
<?php
$data = $_POST['data'];
?>
<script type="text/javascript">
var php_var = "<?php echo data ?>";
function doSomething(php_var) {
// do something with data
}
</script>
Lastly, If the JavaScript function needs to return a value, how would you then transfer that back to php? Could I post to the same page and then get it as a variable with PHP?
Short answer: No.
Your code in ajaxEngine.php would just output that snippet of javascript. This will be transfered back to your page, so you could insert it into a script tag or eval it, if you like it to execute. But this would then happen on the client side not on your server. The script would have the dynamic data from the php, though. So if this is everything you need, it would work that way.
Beware: That would NOT hide your script. It would be visible for any client.
Try this function
function includetext(text,onlyone)
{
var d=document.createElement('script');
if(onlyone)
{
var ds=document.getElementById('onlyonesscript');
if(ds)
removeElement(ds);
d.id='onlyonesscript';
}
d.innerHTML=text;
document.body.appendChild(d);
}
text - returing text of script from ajax.
onlyone use for just one script node, this will help you.
ajaxEngine.php
<?php
$data = $_POST['data'];
?>
var php_var = "<?php echo data ?>";
// do something with data
How can we use PHP code in JavaScript?
Like
function jst()
{
var i = 0;
i = <?php echo 35; ?>
alert(i);
}
Please suggest a better way.
If your whole JavaScript code gets processed by PHP, then you can do it just like that.
If you have individual .js files, and you don't want PHP to process them (for example, for caching reasons), then you can just pass variables around in JavaScript.
For example, in your index.php (or wherever you specify your layout), you'd do something like this:
<script type="text/javascript">
var my_var = <?php echo json_encode($my_var); ?>;
</script>
You could then use my_var in your JavaScript files.
This method also lets you pass other than just simple integer values, as json_encode() also deals with arrays, strings, etc. correctly, serialising them into a format that JavaScript can use.
If you put your JavaScript code in the PHP file, you can, but not otherwise. For example:
page.php (this will work)
function jst()
{
var i = 0;
i = <?php echo 35; ?>;
alert(i);
}
page.js (this won't work)
function jst()
{
var i = 0;
i = <?php echo 35; ?>
alert(i);
}
PHP has to be parsed on the server. JavaScript is working in the client's browser.
Having PHP code in a .js file will not work, except you can tell the server to parse the file you want to have as .js before it sends it to the client. And telling the server is the easiest thing in the world: just add .php at the end of the filename.
So, you could name it javascript.php. Or, so you know what this file is PRIMARILY, you could name it javascript.js.php - the server will recognize it as .php and parse it.
This is the bit of code you need at the top of your JavaScript file:
<?php
header('Content-Type: text/javascript; charset=UTF-8');
?>
(function() {
alert("hello world");
}) ();
Yes, you can, provided your JavaScript code is embedded into a PHP file.
You're pretty much on the ball. The only difference is I'd separate out the JavaScript code so the majority was in an external static file. Then you just define variables or call a function from the actual PHP page:
<script type="text/javascript>
function_in_other_file(<?php echo my_php_var; ?>);
</script>
A small demo may help you:
In abc.php file:
<script type="text/javascript">
$('<?php echo '#'.$selectCategory_row['subID']?>').on('switchChange.bootstrapSwitch', function(event, state) {
postState(state,'<?php echo $selectCategory_row['subID']?>');
});
</script>
Here is an example:
html_code +="<td>" +
"<select name='[row"+count+"]' data-placeholder='Choose One...' class='chosen-select form-control' tabindex='2'>"+
"<option selected='selected' disabled='disabled' value=''>Select Exam Name</option>"+
"<?php foreach($NM_EXAM as $ky=>$row) {
echo '<option value='."$row->EXAM_ID". '>' . $row->EXAM_NAME . '</option>';
} ?>"+
"</select>"+
"</td>";
Or
echo '<option value=\"'.$row->EXAM_ID. '\">' . $row->EXAM_NAME . '</option>';
We can't use "PHP in between JavaScript", because PHP runs on the server and JavaScript - on the client.
However we can generate JavaScript code as well as HTML, using all PHP features, including the escaping from HTML one.
I have a file like "my_js_stuff.js" which is looking like this :
function my_js_function()
{
jQuery.ajax({
url: my_ajax_script.ajaxurl,
data: ({action : 'get_my_comments'}),
success: function() {
//Do stuff here
}
});
This file is included in my
<header>like this: <script type="text/javascript" src="my_js_stuff.js"></script>
I want to call the function from "my_js_stuff.js" inside my php page, and I'm thinking to call it like this:
<?php
<script type="text/javascript>
$('.some-class').on('click', my_js_function()); // this is the function from the js file.
</script>
?>
Is this the correct way to call the function from the js file ?
Thank you !
Is this the correct way to call the function from the js file ?
my_js_function() is certainly the correct way to call it.
But, to pass the function so the event can call it later, you'll want to skip the calling parenthesis:
$('.some-class').on('click', my_js_function);
With them, it'll be called immediately and its return value will instead be passed to the event binding.
Also note that the <script> shouldn't be inside a <?php ... ?> block unless it's in a string being echoed.
<?php
# ...
?>
<script>
$('.some-class').on('click', my_js_function);
</script>
<?php
# ...
?>
You could do that, but I'm not sure that's what you actually want to do. Javascript is executed on the client-side, whereas PHP is executed on the server. Your Ajax function makes a request (client-to-server) and fetches content from the server, such as dynamic content generated from a PHP file.
If what you're describing is really what you want to do, you need to echo your script snippet and enclose it in quotes.
<?php
echo '<script type="text/javascript">/*js content*/</script>';
?>
You're confusing the technologies. Your JS is for the client side (browser) and the PHP is for the server side (business logic).
You cannot call a JS function from inside PHP.
However, assuming you want to communicate JS > PHP, you need to include the JS on your page.
<script type="text/javascript?>
$('.some-class').on('click', my_js_function()); // this is the function from the js file.
</script>
and your URL needs to match the PHP endpoint:
url: my_ajax_script.ajaxurl, // This should be the path of your PHP file
Inside the php file you can get all the info as if it were a normal request:
<?php
echo $_GET['action'];
?>
This will return the $_GET['action'] var to your JS success function:
success: function(data) {
alert('Received: ' + data);
}
Hopefully you can use this information to build what you need.