What are some potential pitfalls of using echo to pass variables between PHP scripts?

One potential pitfall of using echo to pass variables between PHP scripts is that it can lead to security vulnerabilities, as the variables are directly outputted to the browser. To solve this issue, it is recommended to use sessions or POST/GET methods to securely pass variables between scripts. 

// Script 1
session_start();
$_SESSION['variable'] = "value";

// Script 2
session_start();
echo $_SESSION['variable'];

Keywords

echo variables PHP scripts security vulnerabilities data leakage

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