PHP从网页编辑文本

Question

At the moment I have this:

<?php
$stran = file_get_contents("http://meteo.arso.gov.si/uploads/probase/www/fproduct/text/sl/fcast_si_text.html");
$stran = str_replace("<h2>","\n",$stran);
$stran = str_replace("</h2>","\n",$stran);
$stran = str_replace("<h1>","\n",$stran);
$stran = str_replace("</h1>","\n",$stran);
$stran = strip_tags($stran);

echo $stran;
?>

Now this gives me some empty lines at the top. I also want to delete every text after "Vir: Državna meteorološka služba RS (meteo.si - ARSO)" including empty lines before this string.

I've tried some regular expressions but the all delete all text. Hot do I do it?

Answer 1

Can be done using regex.

// Convert h1/h2 opening/closing tags to new line, ignore case
$stran = preg_replace('/<\/?h[12]>/i', "\n", $stran);

$stran = strip_tags($stran);

// Remove all leading whitespace
$stran = preg_replace('/^\s+/', '', $stran);

// Remove everything after "Vir: ..."
$stran = preg_replace('/(?<=Vir: Državna meteorološka služba RS \(meteo.si - ARSO\)).*/s', '', $stran);    

Generally speaking I would recommend to really parse the html to extract the information. Have a look at http://php.net/manual/en/class.domdocument.php