What is the significance of the parse error in the PHP script provided in the forum thread?

The parse error in the PHP script indicates that there is a syntax error in the code, preventing it from being executed properly. To solve this issue, carefully review the code for any missing or misplaced parentheses, brackets, or semicolons. Make sure all opening and closing tags are correctly paired.

// Incorrect code with parse error
$variable = "Hello World";
if ($variable == "Hello World") {
    echo "Greetings!";
else {
    echo "Invalid input";
}

// Corrected code without parse error
$variable = "Hello World";
if ($variable == "Hello World") {
    echo "Greetings!";
} else {
    echo "Invalid input";
}