How to output $ id from the URL, such as tool. php? Info = 200 @ qq @ account $ id

How to output $ id from the URL, such as tool. php? Info = 200 @ qq @ account $ id = $ _ SESSION ['id']; $ info = $ _ GET ['info']; $ arr = expolde (& quot; @ & quot;, $ info); some friends may ask to directly output the value of $ id directly; because how to output the variable $ id in the URL, such as tool. php? Info = 200 @ qq @ account $ id
$ Id = $ _ SESSION ['id'];
$ Info = $ _ GET ['info'];
$ Arr = expolde ("@", $ info );

A friend may ask to directly output the value of $ id;

Because $ id is written into management, and then the user clicks this connection tool. php? Info = @ qq @ account $ id
Then the user ID is automatically output.

I thought about using the eval function, but some friends said it was not safe. Is there any other way to output the $ id in the array $ arr [2] to the variable $ id ??



------ Solution --------------------
Assuming that the final data is still taken from $ _ SESSION
$ V = preg_replace ('/\ $ (\ w +)/ie',' $ _ SEEION ["$1"] ', $ v );