php 返回微信token

<?php
function getWechatAccessToken($appId, $appSecret) {
    $url = "https://api.weixin.qq.com/cgi-bin/token?grant_type=client_credential&appid={$appId}&secret={$appSecret}";
    
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_URL, $url);
    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);
    $output = curl_exec($ch);
    curl_close($ch);

    $result = json_decode($output, true);
    
    if (isset($result['access_token'])) {
        return $result['access_token'];
    } else {
        throw new Exception("Failed to get access token: " . json_encode($result));
    }
}

try {
    $appId = 'your_app_id';
    $appSecret = 'your_app_secret';
    $accessToken = getWechatAccessToken($appId, $appSecret);
    echo "Access Token: " . $accessToken;
} catch (Exception $e) {
    echo $e->getMessage();
}
?>