Description

The following code:

<?php
const a = new stdClass;
a->b = 42;
var_dump(a);

Resulted in this output:

Fatal error: Cannot use temporary expression in write context in /tmp/preview on line 3

But I expected this output instead:

object(stdClass)#1 (1) {
  ["b"]=>
  int(42)
}

(The issue also arises for objects stored in class constants.)

A workaround is to use a temp variable (because a temporary variable is not a “temporary expression”, eh):

<?php
const a = new stdClass;
$_ = a;
$_->b = 42;
var_dump(a); // it works

Another workaround is to use a function returning the value of the constant:

<?php
const a = new stdClass;
constant('a')->b = 42;
var_dump(a); // it works

PHP Version

PHP 8.2

Operating System

No response