issue of my php function inside my jquery code

Question

I Want to execute a php function inside the jquery function .html(). The php function takes 2 integers as parameter.

This code works

$(function() {
    var myVar = 1;
    $('#myDiv').html('<? echo my_function('+myVar+','+1+'); ?>');   
});

and this one doesn't:

$(function() {
    var myVar = 1;
    $('#myDiv').html('<? echo my_function('+myVar+','+myVar+'); ?>');   
});

I don't have a php error, but nothing happens

I highly doubt that the first code works either. JavaScript is executed on the client, PHP on the server. There is no way the server can use the myVar value in PHP. — Gerald Schneider
– Gerald Schneider, Commented Apr 10, 2013 at 6:40
@GeraldSchneider the first one does work, I assure you. So your point is I should use AJAX right? — Gradislava Bikkulova
– Gradislava Bikkulova, Commented Apr 10, 2013 at 6:42
@GradislavaBikkulova it may be possible to say more if you post your my_function() code. — Gerald Schneider
– Gerald Schneider, Commented Apr 10, 2013 at 6:43

user2193789 · Accepted Answer · 2013-04-10 06:46:08Z

1

write a file.php

<?php
my_function(myvar,1);
?>

and in html page use

$('#mydiv').load('file.php');

answered Apr 10, 2013 at 6:46

user2193789

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Comments

Shijin TR · Accepted Answer · 2013-04-10 06:53:10Z

1

You are doing a wrong method, You cant use this method, var myvar; is a javascript variable,That will only available in your browser.But my_function() executed in web server;You can put a php variable in javascript,But not possible to use a javascript variable as argument in php function.make myvar as a php variable,if possible then put it into your function.Or you can use ajax to pass a javascript variable to php function.

Put your function into a php file,Then

     $('#mydiv').load('file.php?myvar='+myvar);

is possible,You can get the value in $_GET['myvar']

answered Apr 10, 2013 at 6:53

Shijin TR

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Comments

Gerald Schneider · Accepted Answer · 2013-04-10 07:09:05Z

I just tried it. So, what happens is this: The PHP parser only cares what's inside the <? ?>tags, nothing else. So it sees this:

echo my_function('+myVar+','+1+');

The function is called with two Parameters, both strings: +myVar+ and +1+. You can check that by putting this in your function:

function my_function() {
    $argv = func_get_args();
    var_dump($argv);
}

It will output this:

array(2) {
  [0]=>
  string(7) "+myVar+"
  [1]=>
  string(3) "+1+"
}

After the PHP generated file is served the client sees this:

$(function() {
    var myVar = 1;
    $('#myDiv').html('The output of your my_function()');   
});

Your JavaScript variable now isn't used anymore.

If you want to print content with a already known ID you can either define the variable in PHP or use a $_GET or $_POST variable to set it in PHP.

If you want to use a dynamic value you will need an AJAX call to another file (where you will have to do what I suggested above).

Mixing PHP and JavaScript like you did is just not possible.

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