simra » Php

Highlight Search Words in php

admin — Sat, 06 Feb 2010 17:30:23 +0000

Many sites have opted for highlighting the keywords from their searches. This can be useful for quickly finding relavant words within large pages of text.

The following php function highlights words within html content (words in tags <> are ignored). Here you can find a live demo http://www.newsaddict.ch.

function highlight_html_content ($text, $search)
{
$search = eregi_replace("[^-a-zA-Z0-9üäöÜÄÖèéê&']", " ", $search); // Sonderzeichen entfernen
$search= ereg_replace ("[ ]+"," ", $search); // Doppelte Leerzeichen entfernen

$words = explode(" ", $search); // Array mit Wörter erstellen

foreach ($words as $word) {
$w = preg_quote($word);

$regexp = "/($w)(?![^<]+>)/iu"; // Wörter innerhalb eines Tags werden ignoriert -> i Gross-/Kleinschreibung nicht beachten -> u UTF8 damit ä=Ä ü=Ü...

$replacement = '\\1';

$text = preg_replace ($regexp,$replacement ,$text);
}
return $text;
}

PHP Regular Expression to extract Urls

admin — Wed, 13 Jan 2010 13:17:56 +0000

The following function extract all links from a page and returns them as an array.

$content = file_get_contents("http://www.simra.ch");
echo var_dump(getLinks( $content ));

function getLinks($content) {
preg_match_all('/(href|src)\=(\"|\')[^\"\'\>]+/i',$content,$media);
$array=preg_replace('/(href|src)(\"|\'|\=\"|\=\')(.*)/i',"$3",$media[0]);
return $array;
}

PHP Regular expression to remove scripts

admin — Wed, 13 Jan 2010 12:58:03 +0000

The following regex removes all script tags.

$content = preg_replace('#(\n?]*?>.*?]*?>)|(\n?]*?/>)#is', '', $content);

Youtube Video Downloader in PHP

admin — Fri, 04 Dec 2009 12:35:34 +0000

The following Php-Script is able to download videos from youtube in three different formats (MP4 for hight, FLV for medium and 3GP for low quality). In addition the script provides a preview of the current video.

View Demo

Here’s the source:

if(isset($_GET['u'])){
$v = urldecode($_GET['u']);
if($_GET['fmt'] == 17){ // 3gp
header("Content-Type: video/3gp");
header("Content-Disposition: attachment; filename=\"video.3gp\"");
$v.="&fmt=17";
}
elseif($_GET['fmt'] == 18){ // mp4
header("Content-Type: video/mp4");
header("Content-Disposition: attachment; filename=\"video.mp4\"");
$v.="&fmt=18";
}
else{ // flv
header("Content-Type: video/x-flv");
header("Content-Disposition: attachment; filename=\"video.flv\"");
}
readfile($v);
flush();
exit();
}else{
$yu = 'http://www.youtube.com/watch?v=qGyfaoUAWtM';
if(isset($_GET["yu"])) $yu = $_GET["yu"];

$c = file_get_contents($yu);

if(preg_match('/"video_id": "(.*?)"/', $c, $m) && preg_match('/"t": "(.*?)"/', $c, $m1)){
$id = $m[1];
$t = $m1[1];
$u = "http://www.youtube.com/get_video?video_id=".$id."&t=".$t;
}
?>

Youtube Url:

Prewiew:

echo $id?>/1.jpg" alt="Preview 1" />
echo $id?>/2.jpg" alt="Preview 2" />
echo $id?>/3.jpg" alt="Preview 3" />

Downloads:

echo $_SERVER['PHP_SELF'].'?u='.urlencode($u)?>">Download FLV

echo $_SERVER['PHP_SELF'].'?fmt=18&u='.urlencode($u)?>">Download MP4

echo $_SERVER['PHP_SELF'].'?fmt=17&u='.urlencode($u)?>">Download 3GP

}
?>

Please check out my Youtube Video Downloader in Python

Simplify a path/url in Php

admin — Wed, 25 Nov 2009 18:26:13 +0000

Here’s a little Php function that simplifies dirs like /./dir or dir/../../dir/ and returns a canonicalized pathname. Unlike the function realpath() it works with every path and url and doesn’t return the absolute path.

function SimplifyPath($path) {
$dirs = explode('/',$path);
for($i=0; $i<count($dirs);$i++) {
if($dirs[$i]=="." || $dirs[$i]=="") {
array_splice($dirs,$i,1);
$i--;
}
if($dirs[$i]=="..") {
$c = count($dirs);
$dirs=Simplify($dirs, $i);
$i-= $c-count($dirs);
}
}
return implode('/',$dirs);
}

function Simplify($dirs, $idx) {
if($idx==0) return $dirs;

if($dirs[$idx-1]=="..") Simplify($dirs, $idx-1);
else array_splice($dirs,$idx-1,2);

return $dirs;
}

simplexml_load_string() error when loading XML content from Twitter

admin — Sun, 06 Sep 2009 01:25:24 +0000

If you are constantly receiving the following error when trying to run simplexml_load_string() to get XML content from Twitter or other, load the xml via file_get_contents() instead of directly into a SimpleXML object (see my example below).

Warning: simplexml_load_string() [function.simplexml-load-string]: Entity: line 10: parser error : Opening and ending tag mismatch: META line 8 and HEAD in/home/vhosts/5000135504/simra.ch/htdocs/simra_2/widgets/twitter.phpon line 17
Warning: simplexml_load_string() [function.simplexml-load-string]:  in/home/vhosts/5000135504/simra.ch/htdocs/simra_2/widgets/twitter.phpon line 17
Warning: simplexml_load_string() [function.simplexml-load-string]: ^ in/home/vhosts/5000135504/simra.ch/htdocs/simra_2/widgets/twitter.phpon line 17
Warning: simplexml_load_string() [function.simplexml-load-string]: Entity: line 11: parser error : Opening and ending tag mismatch: P line 11 and BODY in/home/vhosts/5000135504/simra.ch/htdocs/simra_2/widgets/twitter.phpon line 17
and so on....

channel as $channels) {
  echo '';
  $c=0;
  foreach($channels->item as $entry)  	{
    echo "$entry->title";
    echo "
".date('d.m.y H:i:s', strtotime($entry->pubDate))."";
    echo "";
    $c++;
    if($c==4){
      break;
    }
  }
  echo "";
}
?>