Asked  2 Years ago    Answers:  5   Viewed   127 times

I want to migrate code from PHP 5.2 to 5.4. This worked fine so far except that all the code I use makes extensive use of just using an object with a member without any initialisation, like:

$MyObject->MyMember = "Hello";

which results in the warning: "Creating default object from empty value"

I know that the solution would be to use:

$MyObject = new stdClass();
$MyObject->MyMember = "Hello";

but it would be A LOT OF WORK to change this in all my code, because I use this many times in different projects. I know, it's not good style, but unfortunately I'm not able to spend the next weeks adding this to all of my code.

I know I could set the php error_reporting to not reporting warnings, but I want to be able to still get other warnings and notices. This warning doesn't seem to be effected by enable or disable E_STRICT at all. So is there a way to just disable this warning?!



Technically you could do this by installing your own error handler for warnings. From inside the handler check the string error message; if it's the one you want to suppress then return true, otherwise return false to let the default error handler do its thing.

However I would still recommend doing the right thing and manually fixing your code wherever this misuse does appear because, if nothing else, it gets you into the correct habit. Unless this is paid work (in which case there usually are concerns that override purity of implementation), consider this as a lesson and do the right thing.

Saturday, August 27, 2022
ini_set('display_errors', 1);

Do note though that if you do this in the file that has the syntax error, it won't work, as it'll never get executed then. You can also set this true in php.ini (not recommended for production servers), or if you use Apache, in .htaccess with:

php_flag display_errors 1
Monday, October 24, 2022

If you want to avoid the warning you'll need to pre-create each level:

$data = new stdClass();
$data->result = new stdClass();
$data->result->complex = new stdClass();
$data->result->complex->first_key = $old_data->result->complex;
Tuesday, August 30, 2022

Are you looking at the correct php.ini file? If you have something like MAMP you will find that it has multiple versions of PHP.

Tuesday, November 15, 2022

Your new environment may have E_STRICT warnings enabled in error_reporting for PHP versions <= 5.3.x, or simply have error_reporting set to at least E_WARNING with PHP versions >= 5.4. That error is triggered when $res is NULL or not yet initialized:

$res = NULL;
$res->success = false; // Warning: Creating default object from empty value

PHP will report a different error message if $res is already initialized to some value but is not an object:

$res = 33;
$res->success = false; // Warning: Attempt to assign property of non-object

In order to comply with E_STRICT standards prior to PHP 5.4, or the normal E_WARNING error level in PHP >= 5.4, assuming you are trying to create a generic object and assign the property success, you need to declare $res as an object of stdClass in the global namespace:

$res = new stdClass();
$res->success = false;
Thursday, August 4, 2022
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