Archive for the Category »coding «

19
Dec
Select Box jump to URL
admin

When you need to jump to a specific URL direct after you choosed a Statement from a Selectbox:

 

<select onchange=”window.open(this.options[this.selectedIndex].value,’_self’)”>

    <option value=”">Choose a Language…</option>

    <option value=”database.php?lang=en”>English</option>

    <option value=”database.php?lang=de”>Deutsch</option>

    <option value=”database.php?lang=id”>Italian</option>

    <option value=”database.php?lang=ru”>Russian</option>

</select>

Category: html, javascript  Leave a Comment
19
Dec
Php Browser Language Detection
admin

If you need a Browser Language Detection for your Coding, try this. At the end it come stored in a Session.

< ? php
  function lixlpixel_get_env_var($Var)
    {
      if (empty($GLOBALS[$Var]))
        {
          $GLOBALS[$Var] = (!empty($GLOBALS['_SERVER'][$Var])) ? $GLOBALS['_SERVER'][$Var] : (!empty($GLOBALS['HTTP_SERVER_VARS'][$Var])) ? $GLOBALS['HTTP_SERVER_VARS'][$Var] : ”;
        }
    }
  
  function lixlpixel_detect_lang()
    {
      // Detect HTTP_ACCEPT_LANGUAGE & HTTP_USER_AGENT.
      lixlpixel_get_env_var(‘HTTP_ACCEPT_LANGUAGE’);
      lixlpixel_get_env_var(‘HTTP_USER_AGENT’);
      
      $_AL = strtolower($GLOBALS['HTTP_ACCEPT_LANGUAGE']);
      $_UA = strtolower($GLOBALS['HTTP_USER_AGENT']);
      
      // Try to detect Primary language if several languages are accepted.
      foreach ($GLOBALS['_LANG'] as $K)
        {
          if (strpos($_AL, $K) === 0)
              return $K;
        }
      
      // Try to detect any language if not yet detected.
      foreach ($GLOBALS['_LANG'] as $K)
        {
          if (strpos($_AL, $K) !== false)
              return $K;
        }
      foreach ($GLOBALS['_LANG'] as $K)
        {
          if (preg_match(“/[\[\( ]{$K}[;,_\-\)]/”, $_UA))
              return $K;
        }
      
      // Return default language if language is not yet detected.
      return $GLOBALS['_DLANG'];
    }
  
  // Define default language.
  $GLOBALS['_DLANG'] = ‘en’;
  
  // Define all available languages.
  // WARNING: uncomment all available languages
  
  $GLOBALS['_LANG'] = array(‘af’, // afrikaans.
  ‘ar’, // arabic.
  ‘bg’, // bulgarian.
  ‘ca’, // catalan.
  ‘cs’, // czech.
  ‘da’, // danish.
  ‘de’, // german.
  ‘el’, // greek.
  ‘en’, // english.
  ‘es’, // spanish.
  ‘et’, // estonian.
  ‘fi’, // finnish.
  ‘fr’, // french.
  ‘gl’, // galician.
  ‘he’, // hebrew.
  ‘hi’, // hindi.
  ‘hr’, // croatian.
  ‘hu’, // hungarian.
  ‘id’, // indonesian.
  ‘it’, // italian.
  ‘ja’, // japanese.
  ‘ko’, // korean.
  ‘ka’, // georgian.
  ‘lt’, // lithuanian.
  ‘lv’, // latvian.
  ‘ms’, // malay.
  ‘nl’, // dutch.
  ‘no’, // norwegian.
  ‘pl’, // polish.
  ‘pt’, // portuguese.
  ‘ro’, // romanian.
  ‘ru’, // russian.
  ’sk’, // slovak.
  ’sl’, // slovenian.
  ’sq’, // albanian.
  ’sr’, // serbian.
  ’sv’, // swedish.
  ‘th’, // thai.
  ‘tr’, // turkish.
  ‘uk’, // ukrainian.
  ‘zh’ // chinese.);
  
  // Redirect to the correct location.
  
  //header(‘location: http://www.your_site.com/index_’.lixlpixel_detect_lang().’.php’); // Example Implementation
  //echo ’The Language detected is: ’.lixlpixel_detect_lang(); // For Demonstration
  
  
  function setautolang()
    {
      // start up your PHP session!
      session_start();
      
      $sprache = lixlpixel_detect_lang();
      
      if ($sprache == “de”)
        {
          $_SESSION['lang'] = “deutsch”;
        }
      elseif ($sprache == “en”)
        {
          $_SESSION['lang'] = “english”;
        }
      elseif ($sprache == “cs”)
        {
          $_SESSION['lang'] = “tschechisch”;
        }
      elseif ($sprache == “ru”)
        {
          $_SESSION['lang'] = “russian”;
        }
      elseif ($sprache == “it”)
        {
          $_SESSION['lang'] = “italian”;
        }
      else
        {
          $_SESSION['lang'] = “english”;
        }
    }
?>

Category: php  Leave a Comment
07
Dec
Jobs for international Coders II
admin

include_once(ABSPATH . WPINC . ‘/rss.php’);
$rss = fetch_rss(‘http://www.RentACoder.com/RentACoder/misc/LinkToUs/RssFeed_newBidRequests.asp’);
$maxitems = 50;
$items = array_slice($rss->items, 0, $maxitems);
?>

No items

‘;
else
foreach ( $items as $item ) : ?>

“;

$item['description'] = str_replace(“font-weight:bold;”, “font-weight:normal;”, $item['description']);

$item['description'] = str_replace(“font-size:12px; color:#006699;”, “ffont-size:10px; color:#000000;”, $item['description']);

echo ““.$item['description'].”“;

?>

Category: coding, personal development  Leave a Comment
26
Nov
Easy handling for delimiter PHP Echo Outputs
admin

Sometimes you have some complex Echo and in your String are  ’ or ” and you may come quit crazy with the delimeter of it  like:  echo “<a href=”goto.htm”>test</a>”.  Already you would created an Error by including ” in “”. Now you can choose to make outside ‘ or Inside. But when the Echo comes more complex, you may get some Headache where to use ” and where ‘ and where ` :)

For that Reason you can write your Output for the Echo in <<< label  (your content)  label; and all is done.

 

<?php

echo <<< _end_this

Just a Demo to see, that you can include ‘ or ” or ` in your Output without Problem.<br>Like for Standart Html Commands as <a href=”test.htm”><b>test</b></a><br> and so on :)

_end_this;

?>

Category: php  Leave a Comment
26
Nov
Optimize your PHP Code
admin

When you like really like to code as a pro you should take care on the Optimiziation of your Code. You can speed up your Code by Factor 7, just by taking care on a few Hints.

 

 

 

For example when you look for Scalability you have to make much more compromises instead when you look to speed up your Code.

Especialy when you expect a lot of Traffic you always should look for speed. What is the best System when it is too slow. Just remember your own acting in the Net, when a Page is too slow, you just leave it.

Here I collected you some of the most interesting Tips about that Topic. 

I researched within the following Resources: 

http://www.Cluesheet.com
http://www.chazzuka.com/blog/?p=163
http://reinholdweber.com/?p=3
http://phplens.com/lens/php-book/optimizing-debugging-php.php
http://www.phpbuilder.com/columns/weerning20021209.php3?print_mode=1 

Thanks to all the Coders before me, who collected already quit a lot of that Information.

  • Introduce your PHP-code with <?php because a simple <? may cause interference with XML-code.
  • Do use single quotes over double quotes.
  • Do use switch over lots of if statements
    <?php
    echo ($var==1)?'var is 1':'var is not 1'; 
    ?>

    instead of 

    <?php 
    if ($var==1){
        echo     'var is 1';
    }
    else{
        echo     'var is not 1';
    } 

    ?> 

  • Do avoid testing loop conditionals with function tests every iteration eg.
    for($i=0;i<=count($x);$i++){…
  • Do use foreach for looping collections/arrays. PHP4 items are byval, greater than PHP5 items are byref
  • Do consider using the Singleton Method when creating complex PHP classes.
  • Do use POST over GET for all values that will wind up in the database for TCP/IP packet performance reasons.
  • Do use ctype_alnum,ctype_alpha and ctype_digit over regular expression to test form value types for performance reasons.
  • Do use full file paths in production environment over basename/fileexists/open_basedir to avoid performance hits for the filesystem having to hunt through the file path. Once determined, serialize and/or cache path values in a $_SETTINGS array. $_SETTINGS["cwd"]=cwd(./);
  • Do use require/include over require_once/include_once to ensure proper opcode caching.
  • Do use tmpfile or tempnam for creating temp files/filenames
  • Do use a proxy to access web services (XML or JSOM) on 
  • If a method can be static, declare it static. Speed improvement is by a factor of 4.
  • echo is faster than print.(* compare with list from phplens by John Lim)
  • Use echo’s multiple parameters instead of string concatenation.
  • Set the maxvalue for your for-loops before and not in the loop.
    <?php 
    $max    =filesize('myfile.dat'); //just to make an example
    for ($i=0; $i<$max; $i++){
    //your code
    }
    ?>

    to

    <?php 
    for ($i=0; $i<filesize("myfile.dat"); $i++)

    ?> 

  • Unset your variables to free memory, especially large arrays.
  • Avoid magic like __get, __set, __autoload
  • require_once() is expensive
  • Use full paths in includes and requires, less time spent on resolving the OS paths.
  • If you need to find out the time when the script started executing, $_SERVER[’REQUEST_TIME’] is preferred to time()
  • See if you can use strncasecmp, strpbrk and stripos instead of regex
  • str_replace is faster than preg_replace, but strtr is faster than str_replace by a factor of 4
  • If the function, such as string replacement function, accepts both arrays and single characters as arguments, and if your argument list is not too long, consider writing a few redundant replacement statements, passing one character at a time, instead of one line of code that accepts arrays as search and replace arguments.
  • It’s better to use select statements than multi if, else if, statements.
  • Error suppression with @ is very slow.
  • Turn on apache’s mod_deflate
  • Close your database connections when you’re done with them
  • $row[’id’] is 7 times faster than $row[id]
  • Error messages are expensive
  • Do not use functions inside of for loop, such as for ($x=0; $x < count($array); $x) The count() function gets called each time.
  • Incrementing a local variable in a method is the fastest. Nearly the same as calling a local variable in a function.
  • Incrementing a global variable is 2 times slow than a local var.
  • Incrementing an object property (eg. $this->prop++) is 3 times slower than a local variable.
  • Incrementing an undefined local variable is 9-10 times slower than a pre-initialized one.
  • Just declaring a global variable without using it in a function also slows things down (by about the same amount as incrementing a local var). PHP probably does a check to see if the global exists.
  • Method invocation appears to be independent of the number of methods defined in the class because I added 10 more methods to the test class (before and after the test method) with no change in performance.
  • User HTML for Output instead PHP
    <h3> Today </h3>
    <p>Today I met <?php echo $person; ?>. That was nice.</p>

    instead of 

    <?php
    echo  "<h3>Today</h3><p>Today I met $person. That was nice.";

    ?> 

  • Methods in derived classes run faster than ones defined in the base class.
  • A function call with one parameter and an empty function body takes about the same time as doing 7-8 $localvar++ operations. A similar method call is of course about 15 $localvar++ operations.
  • Surrounding your string by ‘ instead of ” will make things interpret a little faster since php looks for variables inside “…” but not inside ‘…’. Of course you can only do this when you don’t need to have variables in the string.
  • When echoing strings it’s faster to separate them by comma instead of dot. Note: This only works with echo, which is a function that can take several strings as arguments.
  • A PHP script will be served at least 2-10 times slower than a static HTML page by Apache. Try to use more static HTML pages and fewer scripts.
  • Your PHP scripts are recompiled every time unless the scripts are cached. Install a PHP caching product to typically increase performance by 25-100% by removing compile times.
  • Cache as much as possible. Use memcached – memcached is a high-performance memory object caching system intended to speed up dynamic web applications by alleviating database load. OP code caches are useful so that your script does not have to be compiled on every request
  • When working with strings and you need to check that the string is either of a certain length you’d understandably would want to use the strlen() function. This function is pretty quick since it’s operation does not perform any calculation but merely return the already known length of a string available in the zval structure (internal C struct used to store variables in PHP). However because strlen() is a function it is still somewhat slow because the function call requires several operations such as lowercase & hashtable lookup followed by the execution of said function. In some instance you can improve the speed of your code by using an isset() trick.
    Ex. view plaincopy to clipboardprint? 

    1. if (strlen($foo) < 5) { echo “Foo is too short”; } 

    vs. view plaincopy to clipboardprint? 

    1. if (!isset($foo{5})) { echo “Foo is too short”; } 

    Calling isset() happens to be faster then strlen() because unlike strlen(), isset() is a language construct and not a function meaning that it’s execution does not require function lookups and lowercase. This means you have virtually no overhead on top of the actual code that determines the string’s length.

  • When incrementing or decrementing the value of the variable $i++ happens to be a tad slower then ++$i. This is something PHP specific and does not apply to other languages, so don’t go modifying your C or Java code thinking it’ll suddenly become faster, it won’t. ++$i happens to be faster in PHP because instead of 4 opcodes used for $i++ you only need 3. Post incrementation actually causes in the creation of a temporary var that is then incremented. While pre-incrementation increases the original value directly. This is one of the optimization that opcode optimized like Zend’s PHP optimizer. It is a still a good idea to keep in mind since not all opcode optimizers perform this optimization and there are plenty of ISPs and servers running without an opcode optimizer.
  • Not everything has to be OOP, often it is too much overhead, each method and object call consumes a lot of memory.
  • Do not implement every data structure as a class, arrays are useful, too
  • Don’t split methods too much, think, which code you will really re-use
  • You can always split the code of a method later, when needed
  • Make use of the countless predefined functions
  • If you have very time consuming functions in your code, consider writing them as C extensions
  • Profile your code. A profiler shows you, which parts of your code consumes how many time. The Xdebug debugger already contains a profiler. Profiling shows you the bottlenecks in overview
  • mod_gzip which is available as an Apache module compresses your data on the fly and can reduce the data to transfer up to 80%
  • foreign domains using XMLHTTP to avoid cross-domain errors. eg. foo.com<–>XMLHTTP<–>bar.com
  • Do use error_reporting (E_ALL); during debug.
  • Do set Apache allowoverride to “none” to improve Apache performance in accessing files/directories.
  • Do use a fast fileserver for serving static content (thttpd). static.mydomain.com, dynamic.mydomain.com
  • Do serialize application settings like paths into an associative array and cache or serialize that array after first execution.
  • Do use PHP output control buffering for page caching of heavilty accessed pages
  • Do use PDO prepare over native db prepare for statements. mysql_attr_direct_query=>1
  • Do NOT use SQL wildcard select. eg. SELECT *
  • Do use database logic (queries, joins, views, procedures) over loopy PHP.
  • Do use shortcut syntax for SQL insers if not using PDO parameters parameters. eg. INSERT INTO MYTABLE (FIELD1,FIELD2) VALUES ((”x”,”y”),(”p”,”q”));
And yes also a very good Tip from Marion Weerning written on PHPBuilder.com with this simple routine:
 
<?php
$timeparts = explode(” “,microtime());
$starttime = $timeparts[1].substr($timeparts[0],1);//insert your code here  

$timeparts = explode(” “,microtime());
$endtime = $timeparts[1].substr($timeparts[0],1);
echo bcsub($endtime,$starttime,6)
?>

 

 

Category: php  Leave a Comment
26
Nov
Protect your PHP Code
admin

Sometimes you may need to protect your PHP Code. For example when you like to monetize it. For that reason I searched for Applications that help to solve that case and found one Product that works quit fast and does not need any extra Loader. Just Decode any PHP Code and upload it to your Server instead of the Original Code.

TrueBug PHP Obfuscator & Encoder is for PHP application developers use to protect their source codes from modification, the Obfuscate functional will replace class, function, and variable names in PHP source codes with md5-hashes, making source code harder to understand and reverse engineering. The Software also includes simple PHP Encoder engine to encode through the source code by using byte-code technique, and no loader is required to install on the server machine.

Features:

  • Friendly user interface, developers can easily select files to be obfuscated and encoded, can select which classes, functions, and variables to be included or excluded from obfuscation.
  • Run scripts under virtual hosting accounts with no change to the default PHP installation and require no changes to the standard web server installation.
  • Free minor upgrades

System Requirements:

  • 750 MHz CPU with minimum 256 MB of RAM
  • Windows 2000/XP/2003/Vista
I found several Solutions who does charge up to $299 for their Product. Your get TrueBug starting at $24.95.
Personaly I say that is a very fair Price for such a good working Tool. 
Get your PHP Protection at: http://www.truebug.com/
Category: php  Leave a Comment
26
Nov
Regex any URL in PHP
admin

How to validate URLs by a small RegEx Function:

 

function valid_url($str) {
return (!preg_match(‘/^(http|https|ftp):\/\/([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+):?(\d+)?\/?/i’, $str)) ? FALSE : TRUE;
}

 

And how does it work:

^ is an anchor meaning it must start with the pattern
(http|https|ftp) matches and captures one of the three
:\/\/ is :// literally. (\/ is / escaped)
([A-Z0-9][A-Z0-9_-]*(?:\.[A-Z0-9][A-Z0-9_-]*)+)

(letter meaning a-z in the following)

1 letter or number
any number of letters, numbers, _ or -.
A literal dot
1 letter or number
any number of letters, numbers, _ or -.
+ means the previous pattern 1 or more times, and the grouping is around (?:\.[A-Z0-9][A-Z0-9_-]*)+, so it means that pattern any number of times. (It allows for .co.uk for example. )

:? (\d+)?\/?/i
0-1 :
Any amount of digits
An optional literal /

 

You may also like this Tutorial for regular Expressions:
>>Regular Expression Tutorial

Category: php  Leave a Comment
26
Nov
International Jobs for PHP-Coders
admin


Category: coding, personal development  Leave a Comment
24
Nov
Easy private Webcam Broadcasting
admin

When you ever tried to setup a Webcam and stream a live picture into the net you would have found yourself struggling with a lot of different tools that capture your webcam and transform it into a Life-stream.

I worked quit successful with the media encoder from Microsoft and later with a very simple tool http://www.sytexis.com/webcam_tracker_live.php . Also here I had the problem, that always my IP Address changed whenever my router went down or the DSL Connection flipped off. Ok, there are Tools like no-ip.com where you can make a fix URL for your dynamic IP and help you out of that situation.

Now it comes even more easy. First I found http://live.yahoo.com where you can simple connect with your Webcam and they offer that you implement a embedded Video on your Homepage and your Users can see your moving picture. The good thing also here, you don’t need a big bandwidth. When I was working with webcam tracker live and just 3 People where on my Cam, and remember the software was running on my computer, so this 3 Users took nearly my full bandwidth. Now when you stream to a server and the Users get your Video from there. You just need a small bandwidth to upload your Video there and don’t mind how many users view your Video.

Live.yahoo.com was fine, but I did not liked so much that I have to embed a big object into my homepage with there Logo and my webcam and also a Chatwindow. The whole thing was nearly double as big as my original streaming video.

Just yesterday I found  http://justin.tv and they offer also a very simple way to stream your Video with your Webcam to their server and you can embed your live-streaming Video into your Homepage that is not much bigger than the Video itself. Looks like a bit of Youtube.com video just with Live Streaming Pictures.

Sounds too good, also it is fine, I found that my Video still was not very stable and a little bit slow.

For anyone who just like to try it out. Go to http://www.justin.tv stream your Live-video there and embed a Player onto your Homepage. When this is not as good working as you like. Go to Sytexis (as mentioned in the Link above) and download the Live Webcam Tracker. Also than go to NO-IP.COM and make a Host Url for your dynamic IP.  If you need Help, feel free to contact me.

A Demo with the Live Webcam Tracker you find for example at http://www.ilovedahab.com  (look for the Live Stream Webcams)

Category: html  Leave a Comment
24
Nov
Coder, keep your Contacts
admin

It is so important you keep in Contact with your former Clients. 

When I started coding I often felt that there will be always new People asking me for help. I just forgot that I am not the only Coder in the World. So I jumped from one new Client to another new Client. I got quit a good Experience to handle with different People, also after a while I wondered why I don’t here from my former Clients. But the answer is simple. I did not contacted them, another Coder offered his help and I came just forgotten.

You can be as good as you think, there are always some other freaks out there who are as good as you or even better. To be really a Top Coder and always busy with Work, you also have to come a Top Person for Relationship. Keep your Clients remembering on you in a good way. Send them a Greeting Card when they have Birthday, ask sometimes for there Needs or just say Hello.

There are many great Books about how to keep Friendship in Private and also Business. Read a little bit about and keep in mind how important it is to keep in relation with your Clients.

Its similar with your Friends when you was in School. You may be a great Guy everybody loved. Also when you hided for a while, your friends found other friends and the calls come less.

Just don’t think because you are a good Coder with amazing skills, fast, honest and whatever that your former clients always will come to you. There are other People out there, with other Ideas and make your Clients interested in their Work. Life is moving and the world do not stand still.

Also that’s very good for your own Business. There are many Clients out there who had a good Programmer and now they can not reach him, because he changed town or only his email. Now you have a great position to say “hi” and offer your Service.

Category: coding, personal development  Leave a Comment
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