What are the risks of copying and pasting code without understanding it in PHP development?

Copying and pasting code without understanding it in PHP development can lead to errors, security vulnerabilities, and difficulties in maintaining and debugging the code in the future. To avoid these risks, it's important to take the time to understand the code you are using, make necessary modifications to fit your specific requirements, and document any changes made. 

// Example code snippet demonstrating the importance of understanding and modifying copied code
// Original code snippet that was copied without understanding
$var = $_GET['input'];
echo "User input: " . $var;

// Modified code snippet with proper validation and sanitization
$var = isset($_GET['input']) ? htmlspecialchars($_GET['input']) : '';
echo "User input: " . $var;

Keywords

code duplication security vulnerabilities bugs maintenance challenges logic errors code quality

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