issue-updates.php

<?php


/**
 * Starting update via different method.
 *
 * @param object $transient The update request for plugin.
 */
function myplugin_check_for_update( $transient ) {
	error_log( 'hello' );
	if ( empty( $transient->checked ) ) {
		return $transient;
	}

	$plugin_slug    = plugin_basename( __FILE__ );
	$plugin_data    = get_plugin_data( __FILE__ );
	$plugin_version = $plugin_data['Version'];
	$api_url        = 'https://ec.wp2mag.com/ec-plus-fundraiser/update.php';

	$response = wp_remote_get( $api_url );

	if ( is_wp_error( $response ) ) {
		return false;
	}

	$response_body = wp_remote_retrieve_body( $response );
	$json          = json_decode( $response_body );

	if ( version_compare( $plugin_version, $json->new_version, '<' ) ) {
		$transient->response[ $plugin_slug ] = (object) array(
			'slug'        => $plugin_slug,
			'new_version' => $json->new_version,
			'url'         => $json->package_url,
			'package'     => $json->package_url,
		);
	}

	return $transient;
}

add_filter( 'pre_set_site_transient_update_plugins', 'myplugin_check_for_update' );


/**
 * Add the filter to run on init
 *
 * @return void
 */
function run_plugin_update_check() {
	wp_version_check(); // Manually trigger the pre_set_site_transient_update_plugins filter.
	error_log( 'Version check occurred' );
}
add_action( 'init', 'run_plugin_update_check' );

update.php

<?php
$plugin_slug = 'ec-plus-fundraiser'; // Replace with your actual plugin slug
$plugin_zip_url = 'https://ec.wp2mag.com/ec-plus-fundraiser/zips/ec-plus-fundraiser.zip'; // Replace with the URL of your plugin ZIP file

// Get the current version of the plugin
$current_version = isset($_POST['version']) ? $_POST['version'] : '';

// Check if the current version is less than the latest version
if (version_compare($current_version, '1.0.0', '<')) { // Replace '1.0.0' with your actual latest version number
    $update_info = array(
        'slug' => $plugin_slug,
        'new_version' => '1.0.0', // Replace with your actual latest version number
        'url' => $plugin_zip_url,
        'package' => $plugin_zip_url,
    );
    echo json_encode($update_info);
} else {
    echo 'No updates available';
}