php + curl问题curl_init上的资源ID＃2

Question

php + curl issue Resource id # 2 on curl_init:

 $url = "https://example.com:4433/deviceservice/authorize?login=query"; // URL JSON
        $ch = curl_init($url);
        echo $ch; //write Resource id # 2
        if( $ch )
        {
            curl_setopt( $ch, CURLOPT_RETURNTRANSFER, 1 );
            curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
            curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, TRUE);
            $json = curl_exec( $ch );
            $json = json_decode($json);
        } else {
            echo 'nothing';
            }

What am I doing wrong?

Answer 1

curl_init returns a cURL handle on success, FALSE on errors. So echo $ch; will return something like Resource id #2.

See http://php.net/manual/en/function.curl-init.php

You have to try something like this

$url = "https://example.com:4433/deviceservice/authorize?login=query"; // URL JSON

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $url);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt($ch, CURLOPT_SSL_VERIFYPEER, TRUE);
curl_setopt($ch, CURLOPT_SSL_VERIFYHOST, TRUE);
$json = curl_exec( $ch );
$json = json_decode($json);
curl_close($ch);   

if(empty($json)){
   echo 'nothing';
}