注意：在PHP 5.6中使用JSON时，尝试获取非对象错误的属性

Question

I have PHP web page, but I have one problem with the code, I search here, got some similar answer, but sorry I do not understand how to fix my error. When I use MySQLI and PHP 7.1, then my web page work but there is some error, when I use MySQL and PHP 5.6, then my web page works perfect, except for this error, which is below.

this is my error:

Notice: Trying to get property of non-object in /var/www/html/lib/block_io.php on line 95

Notice: Trying to get property of non-object in /var/www/html/lib/block_io.php on line 95

Notice: Trying to get property of non-object in /var/www/html/lib/block_io.php on line 95

Fatal error: Uncaught exception 'Exception' with message 'Failed: ' in /var/www/html/lib/block_io.php:95 Stack trace: #0 /var/www/html/lib/block_io.php(53): BlockIo->_request('get_new_address', Array) #1 /var/www/html/block.php(20): BlockIo->__call('get_new_address', Array) #2 /var/www/html/block.php(20): BlockIo->get_new_address() #3 /var/www/html/deposit.php(76): include('/var/www/html/b...') #4 {main} thrown in /var/www/html/lib/block_io.php on line 95

this is a lines from the code

81         // it's a GET method
82         if ($method == 'GET') { $url .= '&' . $addedData; }
83         curl_setopt($ch, CURLOPT_SSL_CIPHER_LIST, 'TLSv1');
84         curl_setopt($ch, CURLOPT_URL, $url);
85         if ($method == 'POST')
86         { // this was a POST method
87         curl_setopt($ch, CURLOPT_POST, 1);
88         curl_setopt($ch, CURLOPT_POSTFIELDS, $addedData);
89         }
90         curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
91         // Execute the cURL request
92         $result = curl_exec($ch);
93         curl_close($ch);
94         $json_result = json_decode($result);
95         if ($json_result->status != 'success') { throw new 
           Exception('Failed: ' . $json_result->data->error_message); }
96          // Spit back the response object or fail
97          return $result ? $json_result : false;        
98          }

I know that I can't ask good question, I don't know how to search answer here, I don't know how to use answer if I find something similar, but maybe someone can explain me, what I have wrong in this code and give some advice how to fix it

EDIT

OK, I don't know if I do correct, but this var_dump I use here in my line 94

94         $json_result = var_dump($result);

and then I get this error

bool(false) 
Notice: Trying to get property of non-object in /var/www/html/lib/block_io.php on line 95

Notice: Trying to get property of non-object in /var/www/html/lib/block_io.php on line 95

Notice: Trying to get property of non-object in /var/www/html/lib/block_io.php on line 95

Fatal error: Uncaught exception 'Exception' with message 'Failed: ' in /var/www/html/lib/block_io.php:95 Stack trace: #0 /var/www/html/lib/block_io.php(53): BlockIo->_request('get_new_address', Array) #1 /var/www/html/block.php(20): BlockIo->__call('get_new_address', Array) #2 /var/www/html/block.php(20): BlockIo->get_new_address() #3 /var/www/html/deposit.php(76): include('/var/www/html/b...') #4 {main} thrown in /var/www/html/lib/block_io.php on line 95

Ok, here is my full php file, maybe someone see mistake other line not the line 95, please help me, I don't know how to fix this error

http://sandbox.onlinephpfunctions.com/code/29b428d4f224990f865e2a708fd188fd66016766

Answer 1

Try json_decode( $result, true ); you need to tell the function it is an object

Answer 2

json_decode returns true, false, null, an object or an array depending on the given json input. See here .

$json_result->status != 'success' assumes that on object was returned.

In order to verify this, temporarily change line 95 like this:

if ($json_result === true) {
    echo('TRUE');
}
elseif ($json_result === false) {
    echo('FALSE');
}
elseif ($json_result === null) {
    echo('NULL');
}
elseif (is_array($json_result) {
    echo('ARRAY');
    echo($json_result['status'];
}
else {
    echo('EXPECTED OBJECT');
    echo($json_result->status);
}

Or check the content of $result in line 92.

Then you see what json you actually have got and what decoded value you get from it.

As the var-dump shows, you seem to get false . If false is not a valid return value sent by the service, then your curl call is most likely wrong.