How can global evaluation of superglobal variables like $_POST and $_GET impact PHP projects in terms of security and readability?

Global evaluation of superglobal variables like $_POST and $_GET can impact PHP projects negatively in terms of security as it can lead to vulnerabilities such as injection attacks. It can also impact readability as it makes code harder to follow and understand. To mitigate these risks, it is recommended to sanitize and validate input data before using it in the code. 

// Sanitize and validate input data from $_POST
$username = isset($_POST['username']) ? filter_var($_POST['username'], FILTER_SANITIZE_STRING) : '';
$password = isset($_POST['password']) ? filter_var($_POST['password'], FILTER_SANITIZE_STRING) : '';

// Perform further validation and processing

Keywords

superglobal variables global evaluation security readability PHP projects

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