simra » Code Snippets

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;
}

Getting the Screen Size in Java

admin — Wed, 06 Jan 2010 20:35:16 +0000

Here’s a little exmple on how to get the screen size of one or multiple monitors in Java.

Get the size of the default screen:

Dimension dim = Toolkit.getDefaultToolkit().getScreenSize();

If more than one screen is available, this example gets the size of each screen:

GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
GraphicsDevice[] gs = ge.getScreenDevices();

// Get size of each screen
for (int i=0; i<gs.length; i++) {
DisplayMode dm = gs[i].getDisplayMode();
int screenWidth = dm.getWidth();
int screenHeight = dm.getHeight();
}

Modulo 11 Prüfziffer in FoxPro

admin — Wed, 23 Dec 2009 13:12:58 +0000

Hier eine kleine FoxPro Funktion zum Berechnen der «Modulo 11» Prüffziffer.

PROCEDURE modulo_11 (s)
LOCAL x,z,t, c,r,y
t=0
c=7
FOR x = LEN(s) TO 1 STEP -1
z = VAL(SUBSTR(s,x,1))
t = t + c*z
c=c-1
IF c<2
c=7
ENDIF
ENDFOR
r = int(t/11)
r = t-(r*11)
IF r<=9
y="0"+ALLTRIM(STR(r))
ELSE
y=ALLTRIM(STR(r))
ENDIF
RETURN y
ENDIF

handle mouse click events in Java

admin — Sat, 19 Dec 2009 10:07:59 +0000

Here’s a little example on how to add a mouseListener to the component via addMouseListener.

table.addMouseListener(new MouseAdapter() {
@Override
public void mouseClicked(MouseEvent e) {
if (e.getButton() == MouseEvent.NOBUTTON) {
System.out.println("No button clicked...");
} else if (e.getButton() == MouseEvent.BUTTON1) {
System.out.println("Button 1 clicked...");
} else if (e.getButton() == MouseEvent.BUTTON2) {
System.out.println("Button 2 clicked...");
} else if (e.getButton() == MouseEvent.BUTTON3) {
System.out.println("Button 3 clicked...");
}

System.out.println("Number of click: " + e.getClickCount());
System.out.println("Click position (X, Y): " + e.getX() + ", " + e.getY());
}

@Override
public void mouseEntered(MouseEvent e) {
}

@Override
public void mouseExited(MouseEvent e) {
}

@Override
public void mousePressed(MouseEvent e) {
}
@Override
public void mouseReleased(MouseEvent e) {
}
});

How to get all domains in the Active Directory using C#

admin — Thu, 17 Dec 2009 10:01:40 +0000

The following C# function returns a list of all domains in the Active Directory using System.DirectoryServices.

private StringCollection GetDomains()
{
StringCollection domains= new StringCollection();
try
{
DirectorySearcher ds= new DirectorySearcher("objectCategory=Domain");
SearchResultCollection src= ds.FindAll();
foreach (SearchResult rs in src)
{
ResultPropertyCollection rpc= rs.Properties;
foreach( object d in rpc["name"])
{
domains.Add(d.ToString());
}
}
}
catch (Exception)
{
}
return domains;
}

Regular Expressions in C#

admin — Fri, 11 Dec 2009 19:48:51 +0000

A regular expression is a pattern of text that describes what to match in a string. It serves as a filter to find what you’re looking for. The two main function of using regular expression is to match and to replace. The former determines if the pattern is in the string, and if so, find it. Replace changes the string according to the pattern to another pattern.

You can use regular expression (Regex) in your C# (or any other .NET language) application by importing the namespace System.Text.RegularExpressions.

The following examples show the usage of Regular Expressions in C#. I needed them in one of my project to find stuff on a website and I find them very useful.

Returns the innerHtml of a tag (i.e. div) with certain attributes (works with nested tags):

public static String GetInnerHtml(String content, String tag, String attr)
{
Regex re = new Regex(@"(<" + tag + " " + attr + "(.*?)>).*?((?<" + tag + ").*?(?<-TAG> + tag + ">))?(?(TAG)(?!)) + tag + ">");
return re.Match(content).ToString();
}

Returns all Email-Addresses:

public static String[] GetEmailAddresses(String content)
{
Regex re = new Regex(@"[\w\.-]{1,}@[\w\.-]{2,}\.\w{2,3}");
MatchCollection emails = re.Matches(content);
String[] s = new string[emails.Count];
for (int x = 0; x < emails.Count; x++)
s[x] = emails[x].ToString();
return s;
}

Removes all tags:

public static String RemoveTags(String content)
{
Regex re = new Regex("(<[^>]*>)");
content = re.Replace(content, "");
return content;
}

Returns the title tag:

public static String GetTitle(String content){
Regex re = new Regex(@"(?<=)([\s\S]*)(?=)");
return re.Match(content).ToString();
}

Get the content of an url in C#

admin — Tue, 08 Dec 2009 21:26:43 +0000

This is a easy way to get the content of a url into a string. You only need to open a new connection using HttpWebRequest, make a request and read the stream into a string. see the example below:

using System;
using System.Net;
using System.IO;

class functions
{
public static String GetUrlContent(String Url)
{
// Open a connection
HttpWebRequest hwr = (HttpWebRequest)HttpWebRequest.Create(Url);

// Specify header information like
hwr.UserAgent = "simra.ch GetUrlContent";
hwr.Referer = "http://www.simra.ch/";

// Get the Request
WebResponse wr = hwr.GetResponse();

// Open a new Stream
Stream ws = wr.GetResponseStream();

// Create a SteamReader
StreamReader sr = new StreamReader(ws);

// Read the stream
String content = sr.ReadToEnd();

// Cleanup
sr.Close();
ws.Close();
wr.Close();

return 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

wxPython File Save Dialog

admin — Fri, 04 Dec 2009 09:11:57 +0000

This is an example on how to use the wxFileDialog. It allows the user to save or open a file. Setting up a basic dialog is pretty simple.

from wxPython.wx import *

app = wx.PySimpleApp()
saveDlg= wxFileDialog ( None, style = wxOPEN )

if saveDlg.ShowModal() == wxID_OK:
print 'Selected:', saveDlg.GetPath()

saveDlg.Destroy()