psalm/docs/running_psalm/issues/TaintedEval.md

TaintedEval

Emitted when user-controlled input can be passed into to an eval call.

Passing untrusted user input to eval calls is dangerous, as it allows arbitrary data to be executed on your server.

<?php

$name = $_GET["name"];

evalCode($name);

function evalCode(string $name) {
    eval($name);
}