实用的PHP代码片段

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error_reporting(0);

Header("Content-Type: image/jpeg");

//Get IP

if (!empty($_SERVER['HTTP_CLIENT_IP']))

{

  $ip=$_SERVER['HTTP_CLIENT_IP'];

}

elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))

{

  $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];

}

else

{

  $ip=$_SERVER['REMOTE_ADDR'];

}

//Time

$actual_time = time();

$actual_day = date('Y.m.d', $actual_time);

$actual_day_chart = date('d/m/y', $actual_time);

$actual_hour = date('H:i:s', $actual_time);

//GET Browser

$browser = $_SERVER['HTTP_USER_AGENT'];

//LOG

$myFile = "log.txt";

$fh = fopen($myFile, 'a+');

$stringData = $actual_day . ' ' . $actual_hour . ' ' . $ip . ' ' . $browser . ' ' . "\r\n";

fwrite($fh, $stringData);

fclose($fh);

//Generate Image (Es. dimesion is 1x1)

$newimage = ImageCreate(1,1);

$grigio = ImageColorAllocate($newimage,255,255,255);

ImageJPEG($newimage);

ImageDestroy($newimage);

?>

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$meta = get_meta_tags('http://www.emoticode.net/');

$keywords = $meta['keywords'];

// Split keywords

$keywords = explode(',', $keywords );

// Trim them

$keywords = array_map( 'trim', $keywords );

// Remove empty values

$keywords = array_filter( $keywords );

print_r( $keywords );

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$html = file_get_contents('http://www.example.com');

$dom = new DOMDocument();

@$dom->loadHTML($html);

// grab all the on the page

$xpath = new DOMXPath($dom);

$hrefs = $xpath->evaluate("/html/body//a");

for ($i = 0; $i length; $i++) {

       $href = $hrefs->item($i);

       $url = $href->getAttribute('href');

       echo $url.'
';

}

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function _make_url_clickable_cb($matches) {

    $ret = '';

    $url = $matches[2];

    if ( empty($url) )

        return $matches[0];

    // removed trailing [.,;:] from URL

    if ( in_array(substr($url, -1), array('.', ',', ';', ':')) === true ) {

        $ret = substr($url, -1);

        $url = substr($url, 0, strlen($url)-1);

    }

    return $matches[1] . "$url" . $ret;

}

function _make_web_ftp_clickable_cb($matches) {

    $ret = '';

    $dest = $matches[2];

    $dest = 'http://' . $dest;

    if ( empty($dest) )

        return $matches[0];

    // removed trailing [,;:] from URL

    if ( in_array(substr($dest, -1), array('.', ',', ';', ':')) === true ) {

        $ret = substr($dest, -1);

        $dest = substr($dest, 0, strlen($dest)-1);

    }

    return $matches[1] . "$dest" . $ret;

}

function _make_email_clickable_cb($matches) {

    $email = $matches[2] . '@' . $matches[3];

    return $matches[1] . "$email";

}

function make_clickable($ret) {

    $ret = ' ' . $ret;

    // in testing, using arrays here was found to be faster

    $ret = preg_replace_callback('#([\s>])([\w]+?://[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is', '_make_url_clickable_cb', $ret);

    $ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is', '_make_web_ftp_clickable_cb', $ret);

    $ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i', '_make_email_clickable_cb', $ret);

    // this one is not in an array because we need it to run last, for cleanup of accidental links within links

    $ret = preg_replace("#(]+?>|>))]+?>([^>]+?)#i", "$1$3", $ret);

    $ret = trim($ret);

    return $ret;

}

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function data_uri($file, $mime) {

  $contents=file_get_contents($file);

  $base64=base64_encode($contents);

  echo "data:$mime;base64,$base64";

}

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$image = file_get_contents('http://www.url.com/image.jpg');

file_put_contents('/images/image.jpg', $image);//Where to save the image

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function cleanHTML($html) {

///

/// Removes all FONT and SPAN tags, and all Class and Style attributes.

/// Designed to get rid of non-standard Microsoft Word HTML tags.

///

// start by completely removing all unwanted tags

$html = ereg_replace("]*>","",$html);

// then run another pass over the html (twice), removing unwanted attributes

$html = ereg_replace("]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","",$html);

$html = ereg_replace("]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","",$html);

return $html

}

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function get_client_language($availableLanguages, $default='en'){

    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {

        $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);

        foreach ($langs as $value){

            $choice=substr($value,0,2);

            if(in_array($choice, $availableLanguages)){

                return $choice;

            }

        }

    }

    return $default;

}

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    $page_id = "YOUR PAGE-ID";

    $xml = @simplexml_load_file("http://api.facebook.com/restserver.php?method=facebook.fql.query&query=SELECT%20fan_count%20FROM%20page%20WHERE%20page_id=".$page_id."") or die ("a lot");

    $fans = $xml->page->fan_count;

    echo $fans;

?>