用于阵列创建的Eval替代方案

Question

I am storing an array in string form in a database for later retrieval: The value of the array happens to be parameters for a filter_val call.

$str = 'array("options" => array("min_range" => 4))';

I know I can use

eval('$options = ' . $str . ';');

to prepare this value for passing to filter_val, but is there any other way to do this?

This related post (while excellent) didn't handle my exact issue.

Answer 1

I would not use eval() to get your string functional. For example, the function eval may be disallowed on some hosts, thus your application will not work.

A more appropriate way would be to store your options in a json_encode()'d string, and decode when you need.

$options = json_decode($options_from_db);

Or as John Conde mentions, you can serialise it.