如何将所有已定义的变量保存到文件中，并在新脚本中重新创建它们？

Question

I want to define PHP variables in one script, and extract them in a sencond script later.

I think the best way to achieve this, is to use serialize and unserialize.

$all_vars = serialize(get_defined_vars());
file_put_contents('vars.txt', $all_vars);
unset($all_vars);

$all_vars = unserialize(file_get_contents('vars.txt', true));

foreach ($all_vars as $key => $value) {
   $$key = $value;
}
unset($all_vars);

$all_vars = serialize(get_defined_vars());
file_put_contents('vars2.txt', $all_vars);

I would exspect that I have 2 textfiles (vars.txt and vars2.txt) with the exact same content, but they are slightly different.

For example:

vars.txt:

"value_a";r:537;s:10:"key_a";i:1090986352011110587;s:7:"counter"

vars2.txt:

"value_a";a:1:{i:1090986352011110587;r:538;}s:10:"key_a";i:1090986352011110587;s:7:"counter"