cUrl总是返回false

Question

I'm using curl to show pics in a B2B catalogue from a website $img . I cannot understand why it returns always false (It means that

if ($this->checkExist($img))
            return $img;
            return 'http://images/no-image.jpg';

it is always returning no-image.jpg

My curl code is the following

private function checkExist($pic)
    {
        $picNoSpaces = str_replace(' ', '%20', $pic);

        $ch = curl_init($picNoSpaces);

        curl_setopt($ch, CURLOPT_NOBODY, true);
        curl_setopt($ch, CURLOPT_URL,$picNoSpaces);
        // don't download content
        curl_setopt($ch, CURLOPT_FAILONERROR, 1);
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);


        curl_exec($ch);
        $retcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
        curl_close($ch);
        if (200 <= $retcode and 300 > $retcode)
            return true;
        return false;
    }

Could someone help me? Thanks!

Answer 1

$retcode为0，所以这就是为什么我总是返回false但却无法返回的原因