Errors in the autoloaded HTTP/Request2 code, how to troubleshoot composer? - composer-php

Question

I have two different systems with a git repository cloned on them.
the project uses composer to install various dependencies.
One of these is pear/HTTP_Request2 which requires Net/URL2.
Both systems are Windows with a xampp development enviroment. So both run an Apache2 with a PHP 7.1.* installation.
On one of them everything works perfectly after installing via composer install. But the other one always Errors in the autoloaded HTTP/Request2 code:
<b>Warning</b>: require_once(Net/URL2.php): failed to open stream: No such file or directory in <b>C:\xampp\htdocs\XXX\vendor\pear\http_request2\HTTP\Request2.php</b> on line <b>25</b><br />
<br />
<b>Fatal error</b>: require_once(): Failed opening required 'Net/URL2.php' (include_path='C:\xampp\htdocs\XXX\vendor/pear/pear_exception;C:\xampp\htdocs\XXX\vendor/pear/http_request2;C:\xampp\php\PEAR') in <b>C:\xampp\htdocs\XXX\vendor\pear\http_request2\HTTP\Request2.php</b> on line <b>25</b><br />
Looking at the code in the Package we find:
if (!class_exists('Net_URL2', true)) {
require_once 'Net/URL2.php';
}
The dependency of NetURL2 was successfully installed, judging by composers output.
None the less I tried to fix it by also requiring the dependency from HTTP/Request2 "pear/net_url2" : "^2.2.0", in the Project after i heard from a bug (long closed but still) about problems with that (Issue#composer git), which didn't result in a change.
Judging by the inspected code I also assume this question is outdated.
Now I'm stuck not knowing what to do next... Help?
Edit:
My composer.json essentially looks like this if anyone was wondering:
{
"require":
{
"php":">=7.1.4",
"pear/http_request2": "v2.3.0",
"ext-json":"1.5.0",
"ext-PDO":"7.*",
"ext-pdo_mysql":"7.*",
"ext-mbstring":"7.*",
"ext-gd":"7.*"
},
"autoload": {
"files": [
"helper.php",
"settings.php"
],
"classmap": ["./"],
"exclude-from-classmap": ["vendor/"]
}
}

Answer 1

To troubleshoot Composer in general, you can add -vvv flags for verbose information.
Secondly, when you've XDebug extension for PHP installed, you will see a Call Stack each time when a Fatal error happens.
Note: Run phpenmod -s cli xdebug to enable XDebug in CLI mode.
The fatal error happens in pear/http_request2 package (as per vendor/pear/http_request2/HTTP/Request2.php) when it tries to include Net/URL2.php file (part of pear/net_url2, full path: vendor/pear/net_url2/Net/URL2.php).
This path should normally be added by Composer into include_paths.php like:
vendor/composer/include_paths.php: $vendorDir . '/pear/net_url2',
which failed to do so. To generate autoload files again, run this command:
composer dump-autoload -o
and check whether the autoload files under vendor/composer has been generated as expected.
To test that out, I've run this PHP command and it worked:
php -r 'require_once "vendor/autoload.php"; require_once "vendor/pear/http_request2/HTTP/Request2.php";'
Note: To see the failing scenario, remove include of autoload.php.