$GLOBALS Assignement
It is not possible to assign the $GLOBALS variable anymore. The individual values may still be assigned directly.
PHP code
<?php
$GLOBALS['a'] = 1;
$b = &$GLOBALS;
$b = array();
print_r($GLOBALS);
?>
Before
Array
(
)
After
PHP Fatal error: Cannot acquire reference to $GLOBALS
PHP version change
This behavior changed in 8.1.