What best practices should be followed when handling array data in PHP?

When handling array data in PHP, it is important to properly validate and sanitize input to prevent security vulnerabilities such as SQL injection or cross-site scripting attacks. Additionally, it is crucial to use built-in array functions for manipulation and iteration to ensure efficient and error-free code. Lastly, documenting your code and following coding standards will make it easier for others to understand and maintain the code. 

// Example of validating and sanitizing array data
$input_data = $_POST['data']; // Assuming 'data' is coming from a form submission

// Validate input data
if (is_array($input_data)) {
    // Sanitize input data
    $sanitized_data = array_map('htmlspecialchars', $input_data);
    
    // Use built-in array functions for manipulation
    $filtered_data = array_filter($sanitized_data, function($value) {
        return strlen($value) > 0; // Filter out empty values
    });

    // Iterate through the filtered data
    foreach ($filtered_data as $key => $value) {
        echo "Key: $key, Value: $value <br>";
    }
} else {
    echo "Invalid input data";
}

Keywords

array functions data validation error handling security measures performance optimization

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