Looping through all the properties of object php
PhpPhp Problem Overview
How can I loop through all the properties of object?. Right now I have to write a new code line to print each property of object
echo $obj->name;
echo $obj->age;
Can I loop through all the properties of an object using foreach loop or any loop?
Something like this
foreach ($obj as $property => $value)
Php Solutions
Solution 1 - Php
If this is just for debugging output, you can use the following to see all the types and values as well.
var_dump($obj);
If you want more control over the output you can use this:
foreach ($obj as $key => $value) {
echo "$key => $value\n";
}
Solution 2 - Php
For testing purposes I use the following:
//return assoc array when called from outside the class it will only contain public properties and values
var_dump(get_object_vars($obj));
Solution 3 - Php
Before you run the $object through a foreach loop you have to convert it to an array:
$array = (array) $object;
foreach($array as $key=>$val){
echo "$key: $val";
echo "<br>";
}
Solution 4 - Php
Here is another way to express the object property.
foreach ($obj as $key=>$value) {
echo "$key => $obj[$key]\n";
}
Solution 5 - Php
Sometimes, you need to list the variables of an object and not for debugging purposes. The right way to do it is using get_object_vars($object). It returns an array that has all the class variables and their value. You can then loop through them in a foreach loop. If used within the object itself, simply do get_object_vars($this)
Solution 6 - Php
David's answer is solid as long as either: a) you only need access to public attributes, or b) you are working with the stdClass object. If you have defined private or protected attributes in a class and want to display all attributes, simply add an instance method that iterates the properties:
class MyClass {
public $public_attr1;
private $private_attr2;
protected $protected_attr3;
function iterateAttributes() {
foreach ($this as $attr=>$value) {
echo "$attr: $value <br/>";
}
}
}