PHP cannot autoload classes

Question

We used to include only classes that are stored in a {project_root}/includes folder. And we used autoload function to include classes we need in our apps. Now I wanted to use some library and I faced a problem:

1) Autoload:

// {project_root}/includes/autoLoad.php
// There is a global_connfig.php file that loads by directive in php.ini 
// auto_prepend_file = /var/www/global_config.php which includes autoload.php file and sets the include path to {project_root}/includes
function __autoload($classname){
    include "$classname.php";
}

2) Code I wanted to use:

//just an example from the monolog reference
// I put Monolog folder with it's subfolders in {project_root}/includes
use Monolog\Logger;
use Monolog\Handler\StreamHandler;

$log = new Logger("name");
$log->pushHandler(new StreamHandler(LOGSPATH . '/monolog', Logger::WARNING));


$log->warning('Foo');
$log->error('Bar');

3) Errors:

Warning: include(Monolog\Logger.php): failed to open stream: No such file or
directory in {project_root}/includes/autoLoad.php

I tried to use something like this: autoloading classes in subfolders, but still getting Class 'Monolog\Logger' not found

question updated

Where is your autoload function registered ? Did you try "include _ _ DIR _ _."/$classname.php"; ? — Thibault
– Thibault, Commented Sep 29, 2016 at 12:20
In the Code you want to use, where do you include the includes/autoLoad.php ? — Thibault
– Thibault, Commented Sep 29, 2016 at 12:41
Do you have the Monolog\Logger class somewhere in your include_path ? — Thibault
– Thibault, Commented Sep 29, 2016 at 12:52
@Thibault There is a global_connfig.php file that loads by directive in php.ini auto_prepend_file = /var/www/global_config.php which includes autoload.php file — Daria
– Daria, Commented Sep 29, 2016 at 12:58

Thibault · Accepted Answer · 2016-09-29 13:39:19Z

1

Try this autoload function instead :

function __autoload($classname)
{                                      
    $filename = str_replace("\\", "/", $classname).".php";       
    include __DIR__."/$filename";                                     
}

It replaces \ with / to match paths
It searches from the includes/ directory.

You might also consider adding the includes/ path to your include_path php directive :

set_include_path(get_include_path() . PATH_SEPARATOR . "{project_root}/includes");

edited Sep 29, 2016 at 13:39

answered Sep 29, 2016 at 13:13

Thibault

1,59616 silver badges22 bronze badges

Sign up to request clarification or add additional context in comments.

4 Comments

Daria Over a year ago

Woww, that look to remove error I got! Now it's just Warning: include{project_root}/includes/Psr/Log/LoggerInterface.php): But this is inside a Monolog, so now it founds Monolog. Thanks!

simon Over a year ago

There is no need for preg_replace() here. str_replace() will do the job as well and is much faster. I would also recommend using spl_autoload_register() instead of __autoload().

Thibault Over a year ago

While trying it I had the same error. It's because Monolog depends on Psr. See the composer.json from Monolog. You will need Psr. Or use composer to include Monolog and its dependencies, it will help a lot.

Thibault Over a year ago

@simon I switched to str_replace. Thanks. I let the OP decide wether she wants to use spl_autoload_register() or keep __autoload()

Collectives™ on Stack Overflow

PHP cannot autoload classes

1 Answer 1

4 Comments

Your Answer

Linked

Hot Network Questions

Collectives™ on Stack Overflow

1 Answer 1

4 Comments

Your Answer

Sign up or log in

Post as a guest

Linked

Related