Creating default object from empty value in PHP

Question

I see this error only after upgrading my PHP environment to PHP 5 4 and beyond  The error points to this line of code   Error      Creating default object from empty value   Code    res- gt success   false    Do I first need to declare my  res object

User · Answer

In PHP 7 anonymous objects can be created this way:

$res = new class {
    public $success = false;
};

https://www.php.net/manual/en/language.oop5.anonymous.php http://sandbox.onlinephpfunctions.com/code/ab774707a8219c0f35bdba49cc84228b580b52ee

User · Answer

This problem is caused because your are assigning to an instance of object which is not initiated  For eg   Your case    user- gt email    exy gmail com     Solution    user   new User   user- gt email    exy gmail com

User · Answer

I had similar problem and this seem to solve the problem  You just need to initialize the  res object to a class   Suppose here the class name is test   class test        You can keep the class empty or declare your success variable here    res   new test     res- gt success   false

User · Answer

You may need to check if variable declared and has correct type   if   isset  res      is object  res          res   new  stdClass           With php7 you also can create an object in several ways         Object that implements some interface       res   new class implements MyInterface            Object that extends some object       res   new class extends MyClass          res- gt success   true    See PHP anonymous classes

User · Answer

Try this   ini set  error reporting   E STRICT

User · Answer

I had a similar problem while trying to add a variable to an object returned from an API   I was iterating through the data with a foreach loop   foreach    results as  data          data- gt direction   0      This threw the  Creating default object from empty value  Exception in Laravel   I fixed it with a very small change   foreach    results as  amp  data          data- gt direction   0      By simply making  data a reference   I hope that helps somebody a it was annoying the hell out of me

User · Answer

This message has been E STRICT for PHP  lt   5 3  Since PHP 5 4  it was unluckilly changed to E WARNING  Since E WARNING messages are useful  you don t want to disable them completely   To get rid of this warning  you must use this code   if   isset  res         res   new stdClass      res- gt success   false    This is fully equivalent replacement  It assures exactly the same thing which PHP is silently doing - unfortunatelly with warning now - implicit object creation  You should always check if the object already exists  unless you are absolutely sure that it doesn t  The code provided by Michael is no good in general  because in some contexts the object might sometimes be already defined at the same place in code  depending on circumstances

User · Answer

First think you should create object  res   new  stdClass    then assign object with key and value thay   res- success   false

User · Answer

Try this if you have array and add objects to it    product details   array     foreach   products in store as  key   gt   objects       product details  key    new stdClass      the magic    product details  key - gt product id    objects- gt id        see new object member created on the fly without warning      This sends ARRAY of Objects for later use

User · Answer

Simply        res    object array  success   gt false       res- gt success   bool false     Or you could instantiate classes with        res    object array       object stdClass  - gt  recommended       res    object             object stdClass  - gt  works too       res   new  stdClass       object stdClass  - gt  old method   and fill values with        res- gt success     0         bool false        res- gt success   false       bool false        res- gt success    bool 0     bool false    More infos  https   www php net manual en language types object php language types object casting

User · Answer

A simple way to get this error is to type  a  below  meaning to type  b    a   this- gt my- gt variable   b   this- gt my variable  Trivial  but very easily overlooked and hard to spot if you are not looking for it

User · Answer

If you put     character begin of the line then PHP doesn t show any warning notice for this line  For example    unknownVar  someStringVariable - gt totalcall   10     shows a warning message that contains  Creating default object from empty value   For preventing this warning for this line you must put     character begin of the line like this     unknownVar  someStringVariable - gt totalcall    10     no problem  created a stdClass object that name is  unknownVar  someStringVariable  and created a properti that name is totalcall  and it s default value is 0   unknownVar  someStringVariable - gt totalcall    10     you don t need to   character anymore  echo  unknownVar  someStringVariable - gt totalcall     20   I m using this trick when developing  I don t like disable all warning messages becouse if you don t handle warnings correctly then they will become a big error in future

User · Answer

I put the following at the top of the faulting PHP file and the error was no longer display   error reporting E ERROR   E PARSE

User · Answer

Try using     user    object  null

User · Answer

This is a warning which I faced in PHP 7  the easy fix to this is by initializing the variable before using it   myObj new  stdClass      Once you have intialized it then you can use it for objects    myObj- gt mesg   Welcome back -    c user

User · Answer

Your new environment may have E STRICT warnings enabled in error reporting for PHP versions  lt   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- gt 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- gt 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- gt success   false

User · Answer

no you do not    it will create it when you add the success value to the object the default class is inherited if you do not specify one

[php] Creating default object from empty value in PHP?

Examples related to php