What error message does the user encounter in the PHP code provided?

The error message encountered in the PHP code provided is "Fatal error: Uncaught Error: Call to undefined function sum()". This error occurs because the function `sum()` is being called without being defined. To solve this issue, you need to define the `sum()` function before calling it in the code. 

<?php
// Define the sum function
function sum($num1, $num2) {
    return $num1 + $num2;
}

// Call the sum function
$result = sum(10, 20);
echo "The sum is: " . $result;
?>

Keywords

syntax error unexpected semicolon parse error PHP code

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