How can the use of $_GET variables in PHP affect the functionality of code, and what is the correct syntax for accessing these variables?

Using $_GET variables in PHP can affect the functionality of code if not properly sanitized, as it opens up the possibility of injection attacks. To access these variables safely, it is recommended to use filter_input() function with FILTER_SANITIZE_STRING or FILTER_SANITIZE_NUMBER_INT filters to sanitize the input. 

// Accessing $_GET variables safely
$variable = filter_input(INPUT_GET, 'variable_name', FILTER_SANITIZE_STRING);

Keywords

$_GET variables PHP syntax accessing variables functionality

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