Simple script that connects to Square Locations API via cURL and returns existing locations on your account

square-list-locations.php

<?php
/**
 * Simple script that connects to Square Locations API via cURL and returns existing locations on your account. 
 * This is helpful when Square extension does not retrive the locations, and webhosts claim that cURL is working as expected
 * Source: https://developer.squareup.com/docs/locations-api
 *
 * USAGE:
 * This is not a WordPress plugin, so please upload this script to the root directory of the site
 * and access it directly: https://example.com/square-list-locations.php
 *
 * For Production environment:
 * -> Replace PRODUCTION_ACCESS_TOKEN with your ACCESS token from your app at https://developer.squareup.com/apps/
 * -> You need to access the site > Open App > Toggle to production creds > Find the token here https://d.pr/i/HYoFGd
 *
 * For Sandbox environment:
 * -> If you're testing with Sandbox, you'll want to replace  'https://connect.squareup.com/v2/locations' with 'https://connect.squareupsandbox.com/v2/locations'
 * and also replace PRODUCTION_ACCESS_TOKEN below, with the actual Sandbox Access token instead
 * -> You can use the sandbox access token from Square settings page: WooCommerce > Settings > Square > Settings
 * -> Or, you can also use the creds from https://developer.squareup.com/apps/ and grab the sandbox access token from there
 *
 * RESULTS:
 * If things work fine, you'll see a list of Square locations, and their details.
 * If not, you'll see the cURL error. Note that all cURL errors start with `Curl error:`.
 * If you don't see that, the error is returned by Square.
 */

$ch = curl_init();

curl_setopt( $ch, CURLOPT_URL, 'https://connect.squareup.com/v2/locations' );
curl_setopt( $ch, CURLOPT_HTTPHEADER, array( 'Authorization: Bearer PRODUCTION_ACCESS_TOKEN', 'Accept: application/json', 'Square-Version: 2021-04-21' ) );
curl_setopt( $ch, CURLOPT_TIMEOUT, 30 );
curl_setopt( $ch, CURLOPT_RETURNTRANSFER, true );

if ( curl_exec( $ch ) === false ) {
	echo 'Curl error: ' . curl_error( $ch );
} else {
	$data = json_decode( curl_exec( $ch ) );
	echo '<pre>';
	print_r( $data );
	echo '</pre>';
}

curl_close( $ch );