What error message is being displayed in the PHP code snippet?

The error message being displayed in the PHP code snippet is "Fatal error: Uncaught Error: Call to undefined function sum()". This error occurs because the sum() function is not defined in the code. To solve this issue, we need to define the sum() function before calling it. Here is a complete PHP code snippet that implements the fix: 

<?php

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

// Call the sum function
echo sum(5, 3);

?>

Keywords

syntax error PHP code error message code snippet debugging

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