How can the undefined variable $login affect the functionality of the login script in PHP?

If the undefined variable $login is used in the login script without being properly initialized or assigned a value, it can lead to errors or unexpected behavior in the script. To solve this issue, make sure to initialize the $login variable before using it in the script. 

$login = ""; // Initialize the $login variable

// Rest of the login script using the $login variable

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undefined variable $login login script functionality PHP

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