How can PHP developers ensure smooth execution of code after encountering include errors?

When encountering include errors in PHP, developers can ensure smooth execution of code by using the `require_once` function instead of `include`. This function will include the specified file only once, and if it fails to include the file, it will produce a fatal error, halting the script execution. By handling this error gracefully using try-catch blocks, developers can continue the script execution or display a custom error message. 

try {
    require_once 'file.php';
} catch (Exception $e) {
    echo 'Error including file: ' . $e->getMessage();
}
// Code execution continues here

Keywords

error handling try catch include_once require_once exception handling

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