What is the error message indicating in the provided PHP code snippet?

The error message "Fatal error: Uncaught Error: Call to undefined function sum()" indicates that the function sum() is not defined in the code. To solve this issue, we need to define the sum() function before calling it in the code. Here is a complete PHP code snippet that defines the sum() function and then calls it: 

<?php

function sum($a, $b) {
    return $a + $b;
}

$num1 = 10;
$num2 = 20;

$result = sum($num1, $num2);

echo "The sum of $num1 and $num2 is: $result";

Keywords

syntax error unexpected PHP code snippet error message

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