WordPress Plugin Activation triggers a Fatal Error - php

Question

I know there are many questions like this but I couldn't find any that pinged on the specifics relevant to my case. Either that or they went unanswered.
I've written a pretty simple PHP script and uploaded to a wordPress site in a zip folder and when I try to activate the plugin, WordPress gives me a message reading: "Plugin could not be activated because it triggered a fatal error." It does not actually give me any error message. I have WP_DEBUG, WP_DEBUG_LOG, and WP_DEBUG_DISPLAY all set to true, but none of these are updated upon the supposed error. It seems I have no way of finding out what exactly the fatal error is.
I'm kind've at a loss as to how to proceed with this problem. Any help would be useful.
<?php
/*
Plugin Name: Denrile's Plogger
Plugin URI: http://my-awesomeness-emporium.com
description: >- a plugin to that takes the user to the Pruvan website,
after using CURL to log them in so that the redirect doesn't hit a user authentication wall.
Version: 1.0
Author: John Mauran
Author URI: http://github.com/jmauran91
License: GPL2
*/
$j_username = "Denrile";
$j_password = "*************";
$login_url ="https://titlereporter.direct.pruvan.com/v2/login";
$last_url = "https://titlereporter.direct.pruvan.com/v2/pmgr";
function loginToJulian($url, $username, $password){
$curl = curl_init();
$header[0]= "Accept: application/json, text/javascript, */*; q=0.01";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Content-Type: application/x-www-form-urlencoded";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$verbose = fopen(dirname(__FILE__).'/errorlog.txt', 'w');
curl_setopt($curl, CURLOPT_VERBOSE, true);
curl_setopt($curl, CURLOPT_STDERR, $verbose);
// Make the errors visible in a new file
$payload_username = '"'.$username.'"';
$payload_password = '"'.$password.'"';
$payloadtext=urlencode('{"username":'.$payload_username.',"password":'.$payload_password.'}');
$payload = "payload=".$payloadtext;
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_POSTFIELDS, $payload);
curl_setopt($curl, CURLOPT_COOKIEJAR, 'cookie.txt');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$store = curl_exec($curl);
curl_close($store);
}
if(isset($_GET['prvn_login'])){
loginToJulian($login_url, $j_username, $j_password);
header("Location: https://titlereporter.direct.pruvan.com/v2/pmgr");
exit();
}
else{
exit();
}
?>
The general idea of this plugin is that it will hook into a javascript-generated A-tag on the wordPress site, CURL Post to another site to login, and then re-direct to that site, hopefully bypassing the user authentication since the user will already be logged in thanks to the CURL.

Answer 1

This code works for me.
But one question, Why you added exit(); inside the else condition, It is breaking the plugin activation process.
Please check and let me know.
<?php
/*
Plugin Name: Denrile's Plogger
Plugin URI: http://my-awesomeness-emporium.com
description: >- a plugin to that takes the user to the Pruvan website,
after using CURL to log them in so that the redirect doesn't hit a user authentication wall.
Version: 1.0
Author: John Mauran
Author URI: http://github.com/jmauran91
License: GPL2
*/
$j_username = "Denrile";
$j_password = "*************";
$login_url ="https://titlereporter.direct.pruvan.com/v2/login";
$last_url = "https://titlereporter.direct.pruvan.com/v2/pmgr";
function loginToJulian($url, $username, $password){
$curl = curl_init();
$header[0]= "Accept: application/json, text/javascript, */*; q=0.01";
$header[] = "Cache-Control: max-age=0";
$header[] = "Connection: keep-alive";
$header[] = "Content-Type: application/x-www-form-urlencoded";
$header[] = "Keep-Alive: 300";
$header[] = "Accept-Charset: ISO-8859-1,utf-8;q=0.7,*;q=0.7";
$header[] = "Accept-Language: en-us,en;q=0.5";
$verbose = fopen(dirname(__FILE__).'/errorlog.txt', 'w');
curl_setopt($curl, CURLOPT_VERBOSE, true);
curl_setopt($curl, CURLOPT_STDERR, $verbose);
// Make the errors visible in a new file
$payload_username = '"'.$username.'"';
$payload_password = '"'.$password.'"';
$payloadtext=urlencode('{"username":'.$payload_username.',"password":'.$payload_password.'}');
$payload = "payload=".$payloadtext;
curl_setopt($curl, CURLOPT_URL, $url);
curl_setopt($curl, CURLOPT_POST, 1);
curl_setopt($curl, CURLOPT_HTTPHEADER, $header);
curl_setopt($curl, CURLOPT_POSTFIELDS, $payload);
curl_setopt($curl, CURLOPT_COOKIEJAR, 'cookie.txt');
curl_setopt($curl, CURLOPT_RETURNTRANSFER, 1);
$store = curl_exec($curl);
curl_close($store);
}
function default_wordpress_hook(){
if(isset($_GET['prvn_login'])){
loginToJulian($login_url, $j_username, $j_password);
header("Location: https://titlereporter.direct.pruvan.com/v2/pmgr");
exit();
} else {
}
}
add_action("init","default_wordpress_hook");
?>