PHP isset() for Multiple Variables at the Same Time

In PHP you can Check for if Multiple Variables are Set at the Same Time with One Single isset() Statement

When checking for if a variable isset() in php you don't have to use individual isset() checks for each variable ie ....

if(isset($_POST["textarea1"]) && isset($_POST["textarea2"]) && isset($_POST["textarea3"])){ // statements to execute }

For slight code space savings you can check multiple variables with isset at the same time ...

if(isset($_POST["textarea1"], $_POST["textarea2"], $_POST["textarea3"])){ // statements to execute }