PHP数组警告：从空值创建默认对象

Question

I have taken values from a MySQL query into an array so that I can sort them. It all works well except I am getting lots of errors

 Warning: Creating default object from empty value 

This is so that I can sort the array based on post_id and quality

$count = 0;
$searcharticles = new stdClass();
$postid = 0;
while ($row = mysqli_fetch_object($result1) ) {

    $postid     = $row->ID;
    $title      = $row->post_title;
    $titlescore = $row->titlescore;
    $quality    = $row->quality;

    $searcharticles->$postid->post_id =$postid;
    $searcharticles->$postid->title =$title;
    $searcharticles->$postid->titlescore = $titlescore;
    $searcharticles->$postid->quality =$quality;

$count ++;
} 

Some posts on Stackexchange indicated that I should add in $searcharticles = new stdClass();

But this has not solved the problem

I am looking to remove the errors and not just suppress the warnings.

Any ideas?

Answer 1

You get the warning

Warning: Creating default object from empty value

because you do

$searcharticles->$postid->post_id = $postid;

Your $searcharticles is a StdClass. You assign the property $postId and then immediately chain off another property post_id, which forces PHP to create a new default object.

To avoid it, put this before the chained method calls:

$searcharticles->$postid = new StdClass;
$searcharticles->$postid->post_id =$postid;
$searcharticles->$postid->title =$title;
$searcharticles->$postid->titlescore = $titlescore;
$searcharticles->$postid->quality =$quality;