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run code in 300+ PHP versions simultaneously

@ 2014-09-30T13:09:26Z

<?php

error_reporting(E_ALL);

# export ... simulates exporting old data where class Foo didn't implement Serializable
$mode = (isset($argv[1]) && $argv[1] === 'import') ? 'import' : 'export';

if ($mode === 'export')
{
  class Foo
  {
    protected $foo = null;

    public function __construct()
    {
      $this->foo = "something";
    }
  }

  $foo = new Foo();
  $data = serialize($foo);
  file_put_contents('/tmp/phpbug', $data);
}
else
{
  class Foo implements Serializable
  {
    protected $foo = null;

    public function __construct()
    {
      $this->foo = "something";
    }

    public function serialize()
    {
      echo __CLASS__ . "::serialize called\n";
      return $this->foo;
    }

    public function unserialize($data)
    {
      echo __CLASS__ . "::unserialize called\n";
      $this->foo = $data;
    }
  }

  $data = file_get_contents('/tmp/phpbug');
  $foo = unserialize($data);
  if ($foo instanceof Foo)
    echo "Thumbs up!\n";
  else
    echo "Unserialize FAILED\n";
}

Output for 5.0.0 - 5.0.5, 5.1.0 - 5.1.6, 5.2.0 - 5.2.17, 5.3.0 - 5.3.29, 5.4.0 - 5.4.45, 5.5.0 - 5.5.38, 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 7.2.0 - 7.2.34, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.6
Output for 4.4.2 - 4.4.9: Parse error: syntax error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/IL22B on line 12
Process exited with code 255.
Output for 4.3.0 - 4.3.1, 4.3.5 - 4.3.11, 4.4.0 - 4.4.1: Parse error: parse error, unexpected T_STRING, expecting T_OLD_FUNCTION or T_FUNCTION or T_VAR or '}' in /in/IL22B on line 12
Process exited with code 255.
Output for 4.3.2 - 4.3.4: Parse error: parse error, expecting `T_OLD_FUNCTION' or `T_FUNCTION' or `T_VAR' or `'}'' in /in/IL22B on line 12
Process exited with code 255.

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