What's wrong with this try catch?

function rseo_get_seo($check, $post){
//code breaks somewhere in here. or in the rseo_doTheParse function.
switch ($check)
{
case "h1": return rseo_doTheParse('h1', $post);
case "h2": return rseo_doTheParse('h2', $post);
case "h3": return rseo_doTheParse('h3', $post);
case "img-alt": return rseo_doTheParse('img-alt', $post);
}
}

function rseo_doTheParse($heading, $post){
    try { //I get a FATAL error here. unexpected '{'
        $content = $post->post_content;

        if ($content == "") return false;

        $keyword = trim(strtolower(rseo_getKeyword($post)));
        @$dom = new DOMDocument;
        @$dom->loadHTML(st开发者_如何学编程rtolower($post->post_content));
        $xPath = new DOMXPath(@$dom);

        switch ($heading)
        {
            case "img-alt": return $xPath->evaluate('boolean(//img[contains(@alt, "'.$keyword.'")])');
            default: return $xPath->evaluate('boolean(/html/body//'.$heading.'[contains(.,"'.$keyword.'")])');
        }
    }
    catch (Exception $e)
    {
        echo 'Exception caught: ',  $e->getMessage(), "\n";
    }
}

The only thing I can think of is that you're on PHP 4, which doesn't support exception handling. So it thinks try is some kind of constant, but doesn't expect a { to be there.

You should have gotten a parse error, not a fatal error.

That code is 100% valid. Perhaps the error is elsewhere. On a side note, DOM functions don't throw exceptions--you might want to look into libxml_use_internal_errorsand set it up to throw exceptions.

I've pasted the code in a new file and ran it: no error. The problem might be above your code?

Line 14 after the switch block. Remove the second } just before the catch block