runkit.php

<?php

/**
Extension url: https://github.com/runkit7/runkit7
*/

runkit_function_copy('curl_exec', 'curl_exec_orig');

function curl_exec_redefined($ch) {
    if (!is_resource($ch)) {
        debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
        throw new \Exception();
    }
    $response = curl_exec_orig($ch);
    

    $dir = '/tmp/curl/' . date('Ymd_His') . '_' . getmypid();
    if (!is_dir($dir)) {
        mkdir($dir, 0777, true);
    }
    ob_start();
    debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS);
    $trace = ob_get_clean();
    file_put_contents($dir . '/curl_exec_result_' . microtime(true) . '.log', $response . PHP_EOL .PHP_EOL .$trace);
    return $response;
}

runkit_function_redefine('curl_exec', '', 'return curl_exec_redefined(func_get_arg(0));');