How to access a $_SESSION variable inside of modX

24,544 Posts

BobRay Reply #21, 12 years, 3 months ago

You're free to put your scripts anywhere you want. The assets/ folder is a good choice because MODX will never mess with it during upgrades and it makes it easier to back up your own code, but it's up to you.

Yes, session variables work just as you would expect as long as they are in snippets the are executing under MODX.

One quick way to find out the value of a variable at some point in the code is to write to the error log:

$modx->log(modX::LOG_LEVEL_ERROR, 'INCLUDE VALUE: ' . $include;

or in your case, this might be better:

$path = $modx->getOption(base_path) . 'scripts/' . $include . '.php';
$modx->log(modX::LOG_LEVEL_ERROR, 'PATH: ' . $path;
include $path;

For more extensive debugging, you can create a function that writes values to a chunk. I write to a chunk called 'debug'. The optional second argument clears the chunk content before writing (make sure the chunk exists first).

if (!function_exists('myDebug')) {
   function myDebug($msg, $clear = false) {
      $chunk = $modx->getObject('modChunk', array('name' => 'debug'));
      $content = $clear? '' : $chunk->getContent();
      $content .= $msg;
      $chunk->setContent($msg);
      $chunk->save();
   }
}

myDebug($path);

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aaron4osu Reply #22, 12 years, 3 months ago

I'm still having trouble getting this to work.

Here is what I've got now:

inside my home page template I've got this ajax call:

$.ajax({
      type: "POST",
      url: "[[++site_url]][[~17]]",
      data: $('.home1').serialize(),
      success: function(msg){
            //alert(msg);        
            document.location.href = '[[~10]]'; 
      },
      error: function(){
            alert("error");
       }
});//close ajax

in include process form 1 (id17) I put a link to the snippet with php:

[[11]]

then in snippet 11 I've got:

<?php
require_once 'scripts/database_connection.php';
require_once 'scripts/clean_up.php';

// get ip address of user
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
    $ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
    $ip = $_SERVER['REMOTE_ADDR'];
}

if(isset($_POST['zip']) && isset($_POST['product'])){
	$zip = mr_clean($_POST['zip']);
	$product = mr_clean($_POST['product']);
	$_SESSION['product'] = $product;

	$date = date('Y-m-d H:i:s');

    $query = "INSERT INTO bsi_lead ( ip, zip, product, submissionDate)
        VALUES( '$ip', '$zip', '$product','".$date."' );";

	$result = mysql_query($query)
		or die(mysql_error());
	// get id fom insert
	$_SESSION['id'] = mysql_insert_id();

    $query = "SELECT * FROM zipcodes WHERE zipcode = ".$zip.";";
    $result = mysql_query($query);

    $num_rows = mysql_num_rows($result);
    if($num_rows == 1){
		$location = mysql_fetch_array( $result );
	    $city = $location['city'];
	    $city = ucwords(strtolower($city));
	    $_SESSION['city']= $city;
	    
    }
		
	mysql_close($con);
 
}
else{
    echo "no post";
}

Also, I want to set up the debugging as BobRay suggested but I'm not sure where those files each go and then how to access the errors. I'm so used to just using echo's in php, and alerts in query to troubleshoot.

24,544 Posts

BobRay Reply #23, 12 years, 3 months ago

You don't need the site_url tag here. It will be prepended when MODX processes the link tag.

url: "[[++site_url]][[~17]]",

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sottwell Reply #24, 12 years, 3 months ago

Wouldn't that depend on the link_tag_scheme system setting?

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BobRay Reply #25, 12 years, 3 months ago

You're right (as usual). The default is -1, which is a relative URL. Otherwise the site_url or the base_url are prepended for all other values of the setting.

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aaron4osu Reply #26, 12 years, 3 months ago

Sorry I don't really understand what that means. I changed it to

url: "[[~17]]",

but that didn't work either.

My test is that I'm setting a session variable when it goes to php. then I'm echoing it out. Finally I have an alert set when it comes back to the JQuery Ajax Success block.

The alert shows that the session variable is coming back empty and not being set.

Did everything above look ok? especially the include process form 1 (id17) code?

24,544 Posts

BobRay Reply #27, 12 years, 3 months ago

My mistake, you had that right to begin with if you haven't changed the link_tag_scheme setting.

I don't see your snippet returning anything or producing any output unless the $_POST is empty.

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aaron4osu Reply #28, 12 years, 3 months ago

Sorry I didn't update the script show in the post. The current version with the alert is:

<?php
require_once 'scripts/database_connection.php';
require_once 'scripts/clean_up.php';

// get ip address of user
if (!empty($_SERVER['HTTP_CLIENT_IP'])) {
    $ip = $_SERVER['HTTP_CLIENT_IP'];
} elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR'])) {
    $ip = $_SERVER['HTTP_X_FORWARDED_FOR'];
} else {
    $ip = $_SERVER['REMOTE_ADDR'];
}



if(isset($_POST['zip']) && isset($_POST['product'])){
	$zip = mr_clean($_POST['zip']);
	$product = mr_clean($_POST['product']);
	$_SESSION['product'] = $product;

	$date = date('Y-m-d H:i:s');

    $query = "INSERT INTO bsi_lead ( ip, zip, product, submissionDate)
        VALUES( '$ip', '$zip', '$product','".$date."' );";

	$result = mysql_query($query)
		or die(mysql_error());
	// get id fom insert
	$_SESSION['id'] = mysql_insert_id();

    echo "sessionid: ".$_SESSION['id'];

    $query = "SELECT * FROM zipcodes WHERE zipcode = ".$zip.";";
    $result = mysql_query($query);

    $num_rows = mysql_num_rows($result);
    if($num_rows == 1){
		$location = mysql_fetch_array( $result );
	    $city = $location['city'];
	    $city = ucwords(strtolower($city));
	    $_SESSION['city']= $city;
	    
    }
		
	mysql_close($con);
 
}
else{
    echo "no post";
}

43 Posts

aaron4osu Reply #29, 12 years, 3 months ago

So in the resource the only thing I need to put is the id of the snippet inside double brackets?

[[11]]

24,544 Posts

BobRay Reply #30, 12 years, 3 months ago

I'm not sure if it's the issue, but you should always use return rather than echo in MODX snippets.

In fact, if you're going to do this with Ajax, I'd use the MODX infrastructure (especially the modProcessor class) for it.

Personally, I would try to get this working without any JS at all to begin with, though you may be more comfortable with JS than I am.

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