How can PHP beginners improve their understanding of code and avoid relying on pre-written solutions?

To improve their understanding of PHP code and avoid relying on pre-written solutions, beginners can start by practicing writing code from scratch instead of copy-pasting solutions. They can also break down complex problems into smaller, manageable parts and try to solve them one at a time. Additionally, beginners can utilize resources such as online tutorials, documentation, and forums to learn more about PHP concepts and best practices. 

<?php

// Example code snippet to demonstrate understanding of PHP functions

// Function to calculate the sum of two numbers
function calculateSum($num1, $num2) {
    $sum = $num1 + $num2;
    return $sum;
}

// Usage of the function
$number1 = 5;
$number2 = 10;
$result = calculateSum($number1, $number2);

echo "The sum of $number1 and $number2 is: $result";

?>

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