Use php function from javascript

Question

I have php function and I want to call it from a js function. Consider this:

<?php
function phpPrint(){
    echo '<h1>1111</h1><br>';
}
?>

<script>
function doSomthing(){
<?php
phpPrint();
?>
}
</script>

And it didn't work. I hope this question is not duplicate, I saw many questions with the same title, but no one answered my question. I will appreciate if you answer my question and not mark as duplicate. thks

PHP executes first, it is server side. JS executes after, on the users computer, it is client side. You will need to send an ajax request to PHP script. http://i.stack.imgur.com/Ax87s.png — chris85, Jul 27 '15 at 21:36
How can I do it, can it be done easily(without knowing ajax?) — hhgjgj, Jul 27 '15 at 21:40
Yes, there are many tutorials online for it. Have a look here https://learn.jquery.com/ajax/. There are also threads on this site about it.. here's an answer I gave a while ago that was not used, maybe it'll be useful for you, http://stackoverflow.com/questions/28666973/how-can-i-concatenate-a-value-inside-function-in-jquery-in-this-situation/28667255#28667255. — chris85, Jul 27 '15 at 21:41
"`can it be done easily(without knowing ajax?)`" it can't be done at all without ajax — developerwjk, Jul 27 '15 at 21:47
@developerwjk: well, you CAN Do a full-blown round-trip to the server, so never say never... — Marc B, Jul 27 '15 at 21:49
@MarcB Well, not like what he's trying to do. Yes, if you submit a form or click a link you can do it without ajax. — developerwjk, Jul 27 '15 at 21:51
If its simple, can you show me a simple example to make it work.I hope I am not asking for too much... — hhgjgj, Jul 27 '15 at 22:15

Evadecaptcha · Accepted Answer · 2015-07-27T22:20:19.653

To call a php function from javascript you need to use ajax. Keep in mind jQuery needs to be included for this script to work: PHP file foo.php

<?php
    function phpPrint() {
        //do something to get results;
        echo $results; //it's often useful to json_encode this, if it's an array. But whatever is echoed onto the page will be availabe to ajax
        //example of json_encode
        echo json_encode($results);
    }

Ajax script:

$.ajax({
    url: 'foo.php',
    method: 'POST',
    data: { }, //if data needs to be sent to the php script it can be retrieved in the $_POST super global
    success: function(data) { //if the ajax call was successful this method will be called and whatever data was echoed in the php script will be in the data variable
        console.log(data);
        var result = JSON.parse(data); //if you used json_encode for an array or object
    },
    error: function() { //called if the ajax method fails check link for parameters and usages

    },
    complete: function() { //called regardless of success or failure

    }
});

You can check this out http://api.jquery.com/jquery.ajax/ to see other usages or options of the $.ajax method. Ajax is very easy and very useful, there is no reason not to learn ajax, if you want to do web development, you need to learn it.

Use php function from javascript

1 Answers1