PHP, DHTML, Ajax Tutorials?

TeraTask · #1 (**permalink**) 07-03-2007, 11:39 AM

I'd like to write another tutorial, but just can't think of what would help you all the most. I'm proficient in PHP, DHTML, and Ajax (don't complain about the term - I mean the asynchronous connection method with support for SE readability and the ability to work with reader programs for the disabled). What would you like to see an article or 2 written on? Please, feel free to push the envelope - I've done quite a bit of programming, so you don't have to confine yourself to requesting introductory articles that you can find anywhere.

Lee · #2 (**permalink**) 07-03-2007, 06:16 PM

hmm, im stumped, i would be interested in something to do with reading a text file and finding some info then creating another text file and writing the text to it.

TeraTask · #3 (**permalink**) 07-03-2007, 06:20 PM

Quote:

Originally Posted by Lee

hmm, im stumped, i would be interested in something to do with reading a text file and finding some info then creating another text file and writing the text to it.

Like finding what kind of info? Can you give me an example?

Lee · #4 (**permalink**) 07-03-2007, 07:00 PM

Well lets say for some reason you have you data in textfile1 as:

Quote:

USER INFORMATION (id = `1`, user = `Fred`, password = `5f4dcc3b5aa765d61d8327deb882cf99`, email = `fred@fred.com`)
USER INFORMATION (id = `2`, user = `Fred`, password = `5f4dcc3b5aa765d61d8327deb882cf99`, email = `fred@fred.com`)
USER INFORMATION (id = `3`, user = `Fred`, password = `5f4dcc3b5aa765d61d8327deb882cf99`, email = `fred@fred.com`)

have a box to put the 'before' things in e.g. USER INFORMATION (
then then you insert what you want, if you want just user and password
then you insert either user and password and it finds it, or you put where you want the script to go from e.g. the ` for password the number would be 5 as its the 5th ` along and the script would know when the password end is as it would be 5 ++1.

From that it should maybe save the information based on for each set of data you want, a set being id, user etc, in the style of:

id:user:password
id:user:password
id:user:password

colon separating them...i find this thing really good and it can be very useful sometimes, obviously it wouldn't contain user password etc just an example, i have a program in C++ that does this that i got from someone and its simple to edit to your needs and i think C++ is the harder language.

Its just an idea, i need to learn about things like this in php so would help a lot.

Thanks anyway

TeraTask · #5 (**permalink**) 07-03-2007, 07:32 PM

Well, it's not a tutorial, but how's this?

PHP Code:

  <?php
$target_file = 'source.txt';
$output_file = 'target.txt';
//Open the target file for read-only mode.
$fh = @fopen($target_file,'r');
if ($fh) {
  //Open the output file for writing.
  $ofh = @fopen($output_file,'w');
  $nl_prefix = ""; //Will hold newline as a prefix for all lines after the first
  while (!feof($fh)) {
    $a_line = fgets($fh); //Get a full line until a newline is received.
    $a_line = trim($a_line); //Remove any extraneous space that may be present on a blank line
    if (strlen($a_line) > 0) { //This was an empty line, so skip processing.
      //Now, do what you want to the data.  In this case, it's parsing SQL, so let's use preg_match
      preg_match_all('/([a-z0-9\_\-]+) = `([^`]+)`/i',$a_line,$matches);      
      
      if (count($matches[1]) > 0) { //Then, there are matches
        //Now, generate a new output line (id:name:password)
        $output_line = $nl_prefix.$matches[2][0].':'.$matches[2][1].':'.$matches[2][2];        
        
        //Then, write it to the new file.
        fwrite($ofh,$output_line);
        
        //Set newline prefix for non-first lines.
        $nl_prefix = "\n";
      }
    }
  }
  
  //Cleanup by closing each of the open files
  fclose($fh);
  fclose($ofh);
} else {
  echo 'Unable to open file';
}
?>

Oh, let me point out that to customize this for your own usage which may have a different file format, you "just" need to edit the preg_match_all line to the RegEx of your choice.

TeraTask · #6 (**permalink**) 07-03-2007, 07:34 PM

BTW: 5f4dcc3b5aa765d61d8327deb882cf99 is the md5 hash for password. I highly recommend moving on to the sha series of hashes for added security. You may already know this, but I thought it prudent to mention for others who may be reading this thread.

Lee · #7 (**permalink**) 07-03-2007, 09:04 PM

Thanks i will study it soon as it looks good having a look over it, and yes i know about sha but i was using that as an example.

HelloWorld · #8 (**permalink**) 07-03-2007, 09:29 PM

Quote:

Originally Posted by TeraTask

I'd like to write another tutorial, but just can't think of what would help you all the most. I'm proficient in PHP, DHTML, and Ajax (don't complain about the term - I mean the asynchronous connection method with support for SE readability and the ability to work with reader programs for the disabled). What would you like to see an article or 2 written on? Please, feel free to push the envelope - I've done quite a bit of programming, so you don't have to confine yourself to requesting introductory articles that you can find anywhere.

Hmm... I think you should write about AJAX probably? Since there are many PHP tutorials already that PT has

even though I'm not even going to plan to even get into AJAX soon, but I think it would be nice if there's tutorial about that ahead

do you deal some ASP.NET? well, ccoonen I know wrote some tutorials about it... but he used a lot of VB

TeraTask · #9 (**permalink**) 07-03-2007, 10:49 PM

Well, I wrote an Ajax tutorial that's 2 parts and on my own site. Is there some specific usage that you'd like?

HelloWorld · #10 (**permalink**) 07-03-2007, 11:02 PM

well, I personally haven't yet encountered on how AJAX can be much useful other than cosmetics for a site like yours..

haha.. so I'm not sure with that, or probably you can talk about whatever you think can be useful by using AJAX? what kind of application that can be efficient and useful if it's wrote in AJAX

haha...

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