Php list stdclass properties

The stdClass class

Objects of this class can be instantiated with new operator or created by typecasting to object. Several PHP functions also create instances of this class, e.g. json_decode() , mysqli_fetch_object() or PDOStatement::fetchObject() .

Despite not implementing __get()/__set() magic methods, this class allows dynamic properties and does not require the #[\AllowDynamicProperties] attribute.

This is not a base class as PHP does not have a concept of a universal base class. However, it is possible to create a custom class that extends from stdClass and as a result inherits the functionality of dynamic properties.

Class synopsis

This class has no methods or default properties.

Examples

Example #1 Created as a result of typecasting to object

The above example will output:

object(stdClass)#1 (1) < ["foo"]=>string(3) "bar" >

Example #2 Created as a result of json_decode()

The above example will output:

object(stdClass)#1 (1) < ["foo"]=>string(3) "bar" >

Example #3 Declaring dynamic properties

The above example will output:

object(stdClass)#1 (2) < ["foo"]=>int(42) ["1"]=> int(42) >

User Contributed Notes 1 note

In PHP8 this has been changed

A number of warnings have been converted into Error exceptions:

Attempting to write to a property of a non-object. Previously this implicitly created an stdClass object for null, false and empty strings.

So if you add properties to a $var, you first need to make it a stdClass()

$var = new stdClass();
$var->propp1 = «nice»;
$var->propp2 = 1234;

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How to Extract Data from stdClass Object in PHP: Best Practices and Tips

Learn how to extract data from stdClass object in PHP using the best practices and tips provided in this blog post. Decode JSON data, iterate through arrays, access nested properties, and more.

• Using the “->” operator to access object properties
• Decoding JSON data to obtain a stdClass object
• Accessing properties of a stdClass object
• Iterating through an array of stdClass objects
• Converting a stdClass object to an associative array
• Accessing a single property of a stdClass object
• Accessing nested properties of a stdClass object
• Sorting data from a stdClass object
• Other simple code examples for extracting data from stdClass object in PHP
• Conclusion
• How to get value from class object in PHP?
• How to access stdClass object array in PHP?
• How to use stdClass object in PHP?
• How to access object data in PHP?

stdClass objects are a popular feature in PHP programming language. They are instances of a generic empty class that can have properties dynamically added to them. stdClass objects are commonly used in PHP for representing data structures, particularly JSON data that needs to be decoded. In this blog post, we will explore the best practices and tips for extracting data from stdClass objects in PHP.

Using the “->” operator to access object properties

The “->” operator is used to access properties of a stdclass object in php . It is similar to the “.” operator in other programming languages. To access a property of a stdClass object using the “->” operator, you simply specify the property name after the object name, like this:

$obj = new stdClass(); $obj->name = "John"; echo $obj->name; // Output: John 

The “->” operator can also be used to access methods of a stdClass object. However, methods are beyond the scope of this article.

It is important to note that the “->” operator has limitations when it comes to accessing nested properties. If a property is nested within another property, you have to use multiple “->” operators to access it, which can make your code less readable.

Decoding JSON data to obtain a stdClass object

JSON data is a common format for exchanging data between web services. PHP provides the json_decode() function for decoding JSON data into a stdClass object. The json_decode() function takes a JSON string as its first argument and returns a stdClass object.

Here’s an example that demonstrates how to decode JSON data using json_decode() function:

$jsonData = ''; $obj = json_decode($jsonData); echo $obj->name; // Output: John 

The json_decode() function can also take a second argument, which specifies whether the JSON data should be decoded as an associative array or a stdClass object. By default, json_decode() returns a stdClass object.

Using json_decode() function to decode JSON data into a stdClass object has several benefits. It simplifies the process of extracting data from a JSON string and makes the code more readable.

Accessing properties of a stdClass object

As mentioned earlier, the “->” operator is used to access properties of a stdClass object. You can use the “->” operator to access multiple properties of a stdClass object like this:

$obj = new stdClass(); $obj->name = "John"; $obj->age = 30; echo $obj->name . " is " . $obj->age . " years old."; // Output: John is 30 years old. 

However, if you need to access a large number of properties of a stdClass object, this can be tedious and error-prone. In such cases, it’s better to iterate through the object or convert it to an associative array.

Iterating through an array of stdClass objects

Sometimes, you may have an array of stdClass objects that you need to iterate through. In PHP, you can use a for-each loop to iterate through an array of stdClass objects. Here’s an example that demonstrates how to iterate through an array of stdClass objects:

$users = [ new stdClass(), new stdClass(), new stdClass() ]; $users[0]->name = "John"; $users[0]->age = 30; $users[1]->name = "Jane"; $users[1]->age = 25; $users[2]->name = "Bob"; $users[2]->age = 35;foreach ($users as $user)  echo $user->name . " is " . $user->age . " years old.\n"; > 

Using a for-each loop to iterate through an array of stdClass objects makes the code more readable and easier to maintain.

Converting a stdClass object to an associative array

Sometimes, you may need to convert a stdClass object to an associative array. This can be done using json_decode() function with its second argument set to true :

$obj = new stdClass(); $obj->name = "John"; $obj->age = 30; $array = json_decode(json_encode($obj), true); print_r($array); 

The output of the above code will be:

Array ( [name] => John [age] => 30 ) 

Converting a stdClass object to an associative array can make it easier to access properties of the object, especially if you need to access a large number of properties.

Accessing a single property of a stdClass object

If you need to access a single property of a stdClass object, you can use the get_object_vars() function. The get_object_vars() function takes a stdClass object as its argument and returns an associative array of its properties.

Here’s an example that demonstrates how to use the get_object_vars() function to access a single property of a stdClass object:

$obj = new stdClass(); $obj->name = "John"; $obj->age = 30; $vars = get_object_vars($obj); echo $vars["name"]; // Output: John 

Using the get_object_vars() function can simplify the process of accessing a single property of a stdClass object.

Accessing nested properties of a stdClass object

As mentioned earlier, accessing nested properties of a stdClass object using the “->” operator can make your code less readable. However, if you need to access nested properties, you can use multiple “->” operators like this:

$obj = new stdClass(); $obj->person = new stdClass(); $obj->person->name = "John"; $obj->person->age = 30; echo $obj->person->name . " is " . $obj->person->age . " years old."; // Output: John is 30 years old. 

Using multiple “->” operators to access nested properties of a stdClass object can make the code less readable and more error-prone.

Sorting data from a stdClass object

Before accessing data from a stdClass object, it’s important to sort the data. Sorting the data can ensure that the data is organized in a way that makes it easy to access.

Here’s an example that demonstrates how to sort data from a stdClass object:

$obj = new stdClass(); $obj->name = "John"; $obj->age = 30; $obj->gender = "Male"; $vars = get_object_vars($obj); ksort($vars); print_r($vars); 

The output of the above code will be:

Array ( [age] => 30 [gender] => Male [name] => John ) 

Sorting data from a stdClass object can make it easier to access and manipulate the data.

Other simple code examples for extracting data from stdClass object in PHP

In Php as proof, get data from stdclass object php code example

Conclusion

In this blog post, we explored the best practices and tips for extracting data from stdClass objects in PHP. We discussed how to use the “->” operator to access object properties , how to decode JSON data to obtain a stdClass object, how to access properties of a stdClass object, how to iterate through an array of stdClass objects, how to convert a stdClass object to an associative array, how to access a single property of a stdClass object, how to access nested properties of a stdClass object, and how to sort data from a stdClass object. By following these best practices and tips, you can extract data from stdClass objects in PHP more efficiently and effectively.

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Printing stdClass object properties in PHP: A Guide

For the first solution, it is possible to view them by using the suggested method. In the second solution, the problem was resolved by accessing the attributes or methods of the array of objects using the «->» operator. Interestingly, someone posted an alternative solution that prints backtrace without any unnecessary information, only the method that was called and its location.

How to print properties of stdClass object in PHP?

To print, you have two options; var_dump() or print_r() .

Utilize get_object_vars() to obtain a list of all attributes along with their corresponding values in an array.

$properties = get_object_vars($obj); print_r($properties); 

It should be possible for you to observe them by utilizing the code var_dump($myObject); .

This problem has been resolved by me using the following method:

To access the attributes and methods of objects in an array, we utilize the «->» operator.

Get object name as string on php?, You have several way to print a a class name in php: get_class: Returns the name of the class of an object. You will have a warning if the function is called on a …

Is there a better way to print out my object in PHP?

A more concise approach involves utilizing foreach() to iterate and printf() to display values. Additionally, sprintf() can be employed to store the string in a variable.

$results = DB::select('select * from test_table'); $result= json_decode(json_encode($results), true); foreach ($result as $row) < printf('%s %s
', $row['column_A'], $row['column_B']); > 

Is there a better way to print out my object in PHP?, Find centralized, trusted content and collaborate around the technologies you use most. Learn more

Print PHP Call Stack

Easier to comprehend compared to debug_backtrace() .

$e = new \Exception; var_dump($e->getTraceAsString()); #2 /usr/share/php/PHPUnit/Framework/TestCase.php(626): SeriesHelperTest->setUp() #3 /usr/share/php/PHPUnit/Framework/TestResult.php(666): PHPUnit_Framework_TestCase->runBare() #4 /usr/share/php/PHPUnit/Framework/TestCase.php(576): PHPUnit_Framework_TestResult->run(Object(SeriesHelperTest)) #5 /usr/share/php/PHPUnit/Framework/TestSuite.php(757): PHPUnit_Framework_TestCase->run(Object(PHPUnit_Framework_TestResult)) #6 /usr/share/php/PHPUnit/Framework/TestSuite.php(733): PHPUnit_Framework_TestSuite->runTest(Object(SeriesHelperTest), Object(PHPUnit_Framework_TestResult)) #7 /usr/share/php/PHPUnit/TextUI/TestRunner.php(305): PHPUnit_Framework_TestSuite->run(Object(PHPUnit_Framework_TestResult), false, Array, Array, false) #8 /usr/share/php/PHPUnit/TextUI/Command.php(188): PHPUnit_TextUI_TestRunner->doRun(Object(PHPUnit_Framework_TestSuite), Array) #9 /usr/share/php/PHPUnit/TextUI/Command.php(129): PHPUnit_TextUI_Command->run(Array, true) #10 /usr/bin/phpunit(53): PHPUnit_TextUI_Command::main() #11 " 

To obtain a backtrace, you should seek debug_backtrace and/or debug_print_backtrace .

For example, the initial one will provide an array similar to the following one as stated in the manual:

array(2) < [0]=>array(4) < ["file"] =>string(10) "/tmp/a.php" ["line"] => int(10) ["function"] => string(6) "a_test" ["args"]=> array(1) < [0] =>&string(6) "friend" > > [1]=> array(4) < ["file"] =>string(10) "/tmp/b.php" ["line"] => int(2) ["args"] => array(1) < [0] =>string(10) "/tmp/a.php" > ["function"] => string(12) "include_once" > > 

According to reports, the I/O buffer will not be flushed by them, but you have the option to do so manually using either flush or ob_flush .

(Refer to the manual page of the initial one to discover the reason for the «and/or» 😉 )

Strange that noone posted this way:

debug_print_backtrace(DEBUG_BACKTRACE_IGNORE_ARGS); 

This feature displays a clean backtrace that only shows the method names and their respective locations, excluding any unnecessary information.

PHP Data Types, PHP Object. Classes and objects are the two main aspects of object-oriented programming. A class is a template for objects, and an object is an instance of a …

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