echo jQuery function in PHP as variable

Question

Ok so I am trying to echo an function from jQuery inside of PHP.

I was searching a little bit, I did not found any exact answer but I found that I need to use ajax for it ?

I am not familiar with ajax so I have found this.

<?php 
    $status = "<script>
                 $.ajax({ 
                    url: '/',
                    data: {action: 'test'},
                    type: 'post',
                    success: function(output) {
                       notifyBox();
                    }
                 });
               </script>";
?>

I also have this part somewhere on the page:

<?php if(isset($status)) { echo $status; } ?>

I am not quite sure if I need all of that to execute the function ? But it works only if I put jQuery in head of the website.

I usually put all my scripts above </body> (at closing tag) and now it bothers me if I have to put all these scripts into head

Because of many pages I cannot separate all scripts now just cause of one page that bother me at the moment.

Can anyone please tell me, how do I call that function without getting console error of undefined '$' because jQuery is loaded at the end of the page.

Thank you in advance.

Just move that echo statement to somewhere AFTER jQuery is loaded. — Benjam
– Benjam, Commented Nov 30, 2012 at 20:20
Oh my... Now I am blushing :D ! Yeh that was my problem, thank you @Benjam — nonwip
– nonwip, Commented Nov 30, 2012 at 20:22

FixMaker · Accepted Answer · 2012-11-30 20:23:03Z

2

That should work so long as you make sure that you put your PHP if statement after the <script> tag that includes jQuery.

answered Nov 30, 2012 at 20:23

FixMaker

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Comments

Kyle · Accepted Answer · 2012-11-30 20:24:17Z

1

The problem is being caused by jQuery not being loaded when that variable is echoed. When Javascript sees a function call, it executes it right then and there. To prevent this, you will need to echo your variable after jQuery has been loaded.

Example:

<script type="text/javascript" src="path/to/jquery.js"></script>
<?php
    echo $script;
?>

OR, you can put your AJAX call into a function that will be called later:

<?php
    $script = '<script type="text/javascript">function myFunc() {
        //Call AJAX here
    }
    </script>';
    echo $script;
?>

Then later, you can call your function: myFunc();

answered Nov 30, 2012 at 20:24

Kyle

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Comments

Green Black · Accepted Answer · 2012-11-30 20:24:58Z

0

Make sure jquery is loaded. This should work:

$status = "<script type='text/javascript'>
                $(function(){
                   $.ajax({ 
                    url: '/',
                    data: {action: 'test'},
                    type: 'post',
                    success: function(output) {
                       notifyBox();
                    }
                 });
               });
               </script>";

answered Nov 30, 2012 at 20:24

Green Black

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4 Comments

Benjam Over a year ago

This still has the same problem that $ is undefined at the time of execution unless jQuery was loaded somewhere before this script.

Green Black Over a year ago

Yes, you are right. Just put jquery in the header and problems are gone.

Benjam Over a year ago

Which is what the OP was trying to avoid.

Green Black Over a year ago

I can't think of a valid reason not to load jQuery in your header.

Övünç Metin · Accepted Answer · 2012-11-30 20:27:49Z

0

$(document).ready() is also a jquery function, hence, try it with window.onload.

answered Nov 30, 2012 at 20:27

Övünç Metin

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