PHP - Object of class could not be converted to string

Question

I'm trying to print a property of the simple class below. But instead i get the error above. I haven't found an answer on similar questions on here. The error triggers on this line:

echo "$object1 name = " . $object1->name . "<br>";

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<?php
    $object1 = new User("Pickle", "YouGotIt");  
    print_r($object1);
    $object1->name  = "Alice";

    echo "$object1 name = " . $object1->name . "<br>"; /* this triggers the error */

    class User
    {
        public $name, $password;

        function __construct($n, $p) { // class constructor
            $name = $n;
            $password = $p;
        }
    }
?>

Rajdeep Paul · Accepted Answer · 2017-04-02 10:08:39Z

4

There are two things wrong in your code,

You're using local variables in your class constructor, not instance properties. Your constructor method should be like this:
```
function __construct($n, $p) {
    $this->name = $n;
    $this->password = $p;
}
```
Now comes to your error, Object of class could not be converted to string. This is because of this $object in echo statement,
```
echo "$object1 name = " ...
      ^^^^^^^^
```
You need to escape this $object1 with backslash, like this:
```
echo "\$object1 name = " . $object1->name . "<br>";
```

answered Apr 2, 2017 at 10:08

Rajdeep Paul

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Comments

Mahdi nezam parast · Accepted Answer · 2022-01-19 21:39:18Z

1

In my case the problem was the way I was initializing the class variable.

This was my code :

public function __construct(User $userObj) {
    $this->$userObj = $userObj;
}

and I solved it by changing it to the following :

public function __construct(User $userObj) {
    $this->userObj = $userObj;
}

The line in the first snippet caused the problem : $this->$userObj = $userObj

answered Jan 19, 2022 at 21:39

Mahdi nezam parast

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1 Comment

Roland Jan 26 at 15:07

$this then (first code) points at a variable $userObj which comes from the parameter. Class properties must be referenced without a $ sign in front of it. Sure this fixed your code.

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