php curl post提交数据失败解决方法

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function http_req($http_type, $method, $url, $data){    $ch = curl_init();    if (strstr($http_type, 'https')) {        curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, false);        curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);    }    if ($method == 'post') {        curl_setopt($ch, CURLOPT_POST, 1);        curl_setopt($ch, CURLOPT_POSTFIELDS, $data);    } else {        $url = $url . '?' . $data;    }    curl_setopt($ch, CURLOPT_URL, $url);    curl_setopt($ch, CURLOPT_HEADER, 0);    curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);    curl_setopt($ch, CURLOPT_TIMEOUT, 100000);//超时时间    try {        $ret = curl_exec($ch);    } catch (Exception $e) {        curl_close($ch);        return json_encode(array('ret' => 0, 'msg' => 'failure'));    }    curl_close($ch);    return $ret;}  //第一种提交方式在遇到post_data 中包含@等一些符号时会出现提交失败的情况  $url = "http://localhost/web_services.php";　$post_data = array ("username" => "bob","key" => "12345");　$response = http_req('http', 'post', $url, $post_data );　//第二种提交方式可以避免　$url = "http://localhost/web_services.php";　$post_data = "username=bob&key=12345";　$response = http_req('http', 'post', $url, $post_data );

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