How to add property to object in PHP 5 3 strict mode without generating error

Question

This has to be simple  but I can t seem to find an answer      I have a generic stdClass object  foo with no properties   I want to add a new property  bar to it that s not already defined  If I do this    foo   new StdClass     foo- gt bar    1234     PHP in strict mode complains    What is the proper way  outside of the class declaration  to add a property to an already instantiated object   NOTE  I want the solution to work with the generic PHP object of type stdClass   A little background on this issue   I m decoding a json string which is an array of json objects   json decode   generates an array of StdClass object   I need to manipulate these objects and add a property to each one

User · Accepted Answer

If you absolutely have to add the property to the object, I believe you could cast it as an array, add your property (as a new array key), then cast it back as an object. The only time you run into stdClass objects (I believe) is when you cast an array as an object or when you create a new stdClass object from scratch (and of course when you json_decode() something - silly me for forgetting!).

Instead of:

$foo = new StdClass();
$foo->bar = '1234';

You'd do:

$foo = array('bar' => '1234');
$foo = (object)$foo;

Or if you already had an existing stdClass object:

$foo = (array)$foo;
$foo['bar'] = '1234';
$foo = (object)$foo;

Also as a 1 liner:

$foo = (object) array_merge( (array)$foo, array( 'bar' => '1234' ) );

User · Answer

Do it like this    foo   new stdClass     foo- gt   bar      1234     now try   echo  foo- gt bar     should display 1234

User · Answer

I don t know whether its the newer version of php  but this works  I m using php 5 6       lt  php     class Person              public  name          public function save                      print r  this                       p   new Person      p- gt name    Ganga       p- gt age   23       p- gt save      This is the result  The save method actually gets the new property      Person Object               name    gt  Ganga         age    gt  23

User · Answer

Yes   is possible to dynamically add properties to a PHP object   This is useful when a partial object is received from javascript   JAVASCRIPT side   var myObject     name    myName       ajax   type   POST   url   index php       data  myObject  dataType   json       contentType   application json charset utf-8     success function datareceived       if datareceived id  gt   0        the id property has dynamically added on server side via PHP            PHP side    requestString   file get contents  php   input     myObject   json decode  requestString      same object as was sent in the ajax call  myObject- gt id   30     This will dynamicaly add the id property to the myObject object   OR JUST SEND A DUMMY PROPERTY from javascript that you will fill in PHP

User · Answer

If you want to edit the decoded JSON  try getting it as an associative array instead of an array of objects    data   json decode  json  TRUE

User · Answer

you should use magic methods   Set and   get  Simple example    class Foo         This array stores your properties private  content   array     public function   set  key   value                  Perform data validation here before inserting data      this- gt content  key     value      return  this     public function   get  value            You might want to check that the data exists here     return  this- gt  content  value          Of course  don t use this example as this   no security at all      EDIT   seen your comments  here could be an alternative based on reflection and a decorator           class Foo    private  content   array    private  stdInstance   public function   construct  stdInstance         this- gt stdInstance    stdInstance     public function   set  key   value          Reflection for the stdClass object      ref   new ReflectionClass  this- gt stdInstance         Fetch the props of the object       props    ref- gt getProperties         if  in array  key   props              this- gt stdInstance- gt  key    value        else            this- gt content  key     value            return  this     public function   get  value          Search first your array as it is faster than using reflection     if  array key exists  value   this- gt content                 return  this- gt content  value         else            ref   new ReflectionClass  this- gt stdInstance              Fetch the props of the object          props    ref- gt getProperties             if  in array  value   props              return  this- gt stdInstance- gt  value        else           throw new  Exception  No prop in here                      PS   I didn t test my code  just the general idea

User · Answer

I always use this way    foo    object null    create an empty object  foo- gt bar    12345    echo  foo- gt bar    12345

[php] How to add property to object in PHP >= 5.3 strict mode without generating error

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