Heredoc Syntax In An Array

Until PHP 7.2, it is only possible to use the HEREDOC (and NOWDOC) syntax with a final semicolon. This means it was impossible to use that syntax in an array, a list of arguments, or other context that do not finish the expression with a semicolon.

PHP code

<?php

$a = array(<<<HEREDOC
A
HEREDOC,
);

print_r($a);

?>

Before

PHP Parse error:  syntax error in /codes/heredoc_in_array.php on line 10

Parse error: syntax error in /codes/heredoc_in_array.php on line 10

After

Array
(
    [0] => A
)

PHP version change

This behavior changed in 7.3