Good error handling with file_get_contents

Question

I am making use of simplehtmldom which has this funciton:

// get html dom form file
function file_get_html() {
    $dom = new simple_html_dom;
    $args = fu         


        

Answer 1

From my POV, good error handling is one of the big challenges in PHP. Fortunately you can register your own Error Handler and decide for yourself what to do.

You can define a fairly simple error handler like this:

function throwExceptionOnError(int $errorCode , string $errorMessage) {
    // Usually you would check if the error code is serious
    // enough (like E_WARNING or E_ERROR) to throw an exception
    throw new Exception($errorMessage);
}

and register it in your function like so:

function file_get_html() {
    $dom = new simple_html_dom;
    $args = func_get_args();
    set_error_handler("throwExceptionOnError");
    $dom->load(call_user_func_array('file_get_contents', $args), true);
    restore_error_handler();
    return $dom;
}

• For an exhaustive list of error codes see http://php.net/manual/errorfunc.constants.php
• For a complete documentation of set_error_handler, see http://php.net/manual/en/function.set-error-handler.php