<?php
echo '<pre>';
$path = '/home/caracuanbiz/anthropic-secret.php';
echo 'File exists: ' . (file_exists($path) ? 'YES' : 'NO') . "\n";
$key = include $path;
echo 'Key type: ' . gettype($key) . "\n";
echo 'Key length: ' . strlen((string)$key) . " chars\n";
echo 'Key prefix: ' . substr((string)$key, 0, 10) . "...\n";
echo '</pre>';