PHP Decode

--TEST--
Phar: fopen a .phar for writing (existing file) zip-based
--EXTENSIONS--
phar
--INI--
phar.readonly=0
phar.require_hash=0
--FILE--
<?php

$fname = __DIR__ . '/' . basename(__FILE__, '.php') . '.phar.zip';
$alias = 'phar://' . $fname;

$phar = new Phar($fname);
$phar->setStub('<?php __HALT_COMPILER(); ?>');

$files = array();

$files['a.php'] = '<?php echo "This is a\n"; ?>';
$files['b.php'] = '<?php echo "This is b\n"; ?>';
$files['b/c.php'] = '<?php echo "This is b/c\n"; ?>';

foreach ($files as $n => $file) {
    $phar[$n] = $file;
}
$phar->stopBuffering();

ini_set('phar.readonly', 1);

var_dump(fopen($alias . '/b/c.php', 'wb'));
include $alias . '/b/c.php';
?>
--CLEAN--
<?php unlink(__DIR__ . '/' . basename(__FILE__, '.clean.php') . '.phar.zip'); ?>
--EXPECTF--
Warning: fopen(phar://%sopen_for_write_existing_c.phar.zip/b/c.php): Failed to open stream: phar error: write operations disabled by the php.ini setting phar.readonly in %sopen_for_write_existing_c.php on line %d
bool(false)
This is b/c