如何使用＆传递curl中的数组？

Question

I made one curl call function it's like below:

public function curl($url, $post = array()){
    $ch = curl_init();
    curl_setopt($ch, CURLOPT_USERAGENT, "Mozilla/5.0 (Windows; U; Windows NT 5.1; en-US; rv:1.8.0.12) Gecko/20070508 Firefox/1.5.0.12");
    curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, FALSE);
    curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, 0);
    curl_setopt($ch, CURLOPT_COOKIEJAR, $this->ckfile);
    curl_setopt($ch, CURLOPT_COOKIEFILE, $this->ckfile);
    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, 1);
    curl_setopt($ch, CURLOPT_HEADER, 1);
    // curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2);
    curl_setopt($ch,CURLOPT_RETURNTRANSFER,true);
    curl_setopt($ch,CURLOPT_URL, $url);
    if(!empty($post)){
        $post_string = "";
        foreach($post as $key=>$value) { $post_string .= $key.'='.urlencode($value).'&'; }
        rtrim($post_string, '&');
        curl_setopt($ch,CURLOPT_POST, count($post));
        curl_setopt($ch,CURLOPT_POSTFIELDS, $post_string);
    }
    $res = curl_exec($ch);
    if (curl_errno($ch)) {
        $this->deliver_responce('201','Couldn\'t send request: ' . curl_error($ch));exit();
    }
    else {
        $resultStatus = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        if ($resultStatus == 200) {
            //echo "Post Successfully!";
            return true;
        }
        else{
            $this->deliver_responce('200','Request failed: HTTP status code: ' . $resultStatus);exit();
        }
    }
}

I have to call it with URL and array that I want to post. It's working when the array has key and value but not working when I have nested array. It’s working for:

array(
    'id'=>1,
    'name'=>'apple'
)

but not working for

array(
    'id'=>5,
    'cmd'=>array('password','encrypt','decrypt')
)

I think problem is at:

foreach($post as $key=>$value) { $post_string .= $key.'='.urlencode($value).'&'; }

In my function but I don't know how to do it.

Answer 1

it's solved changing foreach loop like

foreach($post as $key=>$value) { 
    if (is_array($value)) {
        foreach ($value as $val) {
            $post_string .= $key.'[]='.urlencode($val).'&';
        }
    } 
    else{ 
        $post_string .= $key.'='.urlencode($value).'&'; 
    }
}