<?php

/**

* Sanitizes environment variable input for scheduled runs with rate limiting.

*

* @param array $envVars An array of environment variables.

* @param array $rateLimits An array of rate limits, where keys are variable names and values are arrays

* containing 'max_calls' and 'time_window' (in seconds).

* @return array Sanitized environment variables.

* @throws Exception If rate limits are exceeded.

*/

function sanitizeAndRateLimitEnvVars(array $envVars, array $rateLimits): array

{

$sanitizedEnvVars = [];

foreach ($envVars as $name => $value) {

// Sanitize input (e.g., remove potentially malicious characters)

$sanitizedValue = trim(htmlspecialchars($value));

// Check rate limit

if (isset($rateLimits[$name])) {

$limit = $rateLimits[$name];

$maxCalls = $limit['max_calls'];

$timeWindow = $limit['time_window'];

// Implement simple rate limiting logic (can be replaced with a more robust solution)

$calls = 0;

$now = time();

// Check for calls within the time window

foreach ($envVars as $key => $val) {

if ($key === $name) continue; // Skip the current variable

if (isset($rateLimits[$key])) {

$limitKey = $rateLimits[$key]['max_calls'];

$timeWindowKey = $rateLimits[$key]['time_window'];

$lastCallTime = $_SESSION['last_call_' . $key] ?? 0;

if ($now - $lastCallTime < $timeWindowKey) {

$calls++;

}

}

}

if ($calls >= $maxCalls) {

throw new Exception("Rate limit exceeded for: " . $name);

}

// Update last call time for this variable

$_SESSION['last_call_' . $name] = $now;

}

$sanitizedEnvVars[$name] = $sanitizedValue;

}

return $sanitizedEnvVars;

}

//Example usage (for testing)

/*

$envVars = [

'INPUT_DATA' => 'test input',

'API_KEY' => 'some_key',

'OTHER_VAR' => 'another value'

];

$rateLimits = [

'API_KEY' => ['max_calls' => 5, 'time_window' => 60],

'INPUT_DATA' => ['max_calls' => 10, 'time_window' => 30]

];

try {

$sanitizedVars = sanitizeAndRateLimitEnvVars($envVars, $rateLimits);

print_r($sanitizedVars);

} catch (Exception $e) {

echo "Error: " . $e->getMessage();

}

*/

?>