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Bug #77797 Array assignment
Submitted: 2019-03-26 12:27 UTC Modified: 2019-03-26 12:35 UTC
From: taco at procurios dot nl Assigned:
Status: Duplicate Package: Unknown/Other Function
PHP Version: 7.2.16 OS: linux
Private report: No CVE-ID: None
 [2019-03-26 12:27 UTC] taco at procurios dot nl
Description:
------------
When passing an array append assignment directly to a public or protected method with opcache enabled, the array itself is passed to the method instead of the assigned value. Calling private methods or functions will not trigger this behaviour.

This behaviour only occurs with opcache enabled (tested both in cli and as apache module), so you'll need to run it at least twice to see the faulty behaviour.

Test script:
---------------
<?php
class Foo
{
    public function baz($arg)
    {
        return $arg;
    }

    public function bar()
    {
        $a = [];
        return $this->baz($a[] = 'foo');
    }
}

$foo = new Foo();
var_dump($foo->bar());

Expected result:
----------------
string(3) "foo"

Actual result:
--------------
array(1) {
  [0] =>
  string(3) "foo"
}

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 [2019-03-26 12:35 UTC] nikic@php.net
-Status: Open +Status: Duplicate
 [2019-03-26 12:35 UTC] nikic@php.net
Duplicate of bug #77691, which has been fixed in 7.2.17.
 
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