This is related to #115, but to do with the other Phar URI mapping function Phar::mount(). This allows the application to bind an external file to a mount point within a Phar. I was testing this to see if the related fix also worked for mount points.

Here is the simple test stub that shows this:

<?php
    # phar.readonly must be 0
    $dir = dirname(__FILE__);
    foreach (['A', 'B'] as $v) {
        file_put_contents("$dir/temp{$v}.txt", "This is test file {$v}\n");
        $stub = "<?php
        Phar::interceptFileFuncs();
        header('Content-Type: text/plain;');
        Phar::mount('temp.txt', '$dir/temp{$v}.txt' );
        require 'phar://this/index.php';
        __HALT_COMPILER(); ?>";
        $p = new Phar( "$dir/$v.phar.php", 0, 'this');
        $p['index.php'] = "<?php
            echo \"Entering Index $v.\n\";
            include 'phar://this/hello.php';
            include 'phar://this/temp.txt'; 
            ";
        $p['hello.php'] = "Hello World says I am $v!\n";    
        $p->setStub($stub);
        unset($p);
    }

Run this in CLI mode with -d phar.readonly=0 and it creates the Phars {A,B}.phar.php in the current directory. Executing in these in the CLI, eg. php A.phar.php gives the output:

Entering Index A.
Hello World says I am A!
This is test file A

and similarly for the B variant. Likewise requesting http:://localhost:8888/A.phar.php against a php -d opcache.enable=0 -S local:host:8888 works fine and the A and B variants can be randomly intermixed giving the expected return.

When repeated with OPcache enabled, A then B gives

• the A then B output with Xinchen's patch
• the A then A again without this patch showing the path issue when using phar #115 bug.

However, if you do A, B, A or A, A then Phar throws a PharException on the mount statement in subsequent invocations. This doesn't happen with OPcache disabled.

I'll track down the root-cause and post back. I suspect that the best way to address this and #115 is to review the entire URI mapping strategy within Phar and make it fully OPcache compatible by adding the correct hook function into zend.h and chaining this through Phar. A 5.6 fix rather than 5.5.x.