Hi I have been working on a way to generate names using md5 and date function in PHP.
I am wondering if there is a limit to the number of characters in a filename.
*Currently the length is 32+4 =36 because of the extension and the period
EX: 99d865983dd505bfd2ba20ea7239e60c
and how do I make it so that If I export a file *.jpg and *.flv so the hash doesn't change when it is done with the first one from to the second one
if you see anything wrong let me know.
MY CODE ONLY HAS THE GENERATOR PART FOR THE LINK ONE

PHP Code:


<?

$input =$_GET['input'];
$encryptText = date('dDjLNSwzWFmMntLoYyaABgGhHisueIOPTZcru');
$encryptedText = md5($encryptText ); 
echo $encryptedText;
$output=$encryptedText;
    
        exec('ffmpeg -i /home/forbushj/uploadvidd/'.$input.' -ar 22050 -ab 32 -f flv -s 320x240 /home/forbushj/public_html/2vidd/'.$output.'.flv');
        exec('ffmpeg -i /home/forbushj/uploadvidd/'.$input.' -an -ss 00:00:45 -an -r 1 -vframes 1 -y -s 150x100 /home/forbushj/public_html/2vidd/'.$output.'.jpg');
        echo'<p></p>';
        echo('ffmpeg -i /home/forbushj/uploadvidd/'.$input.' -ar 22050 -ab 32 -f flv -s 320x240 /home/forbushj/public_html/2vidd/'.$output.'.flv');
        echo'<p></p>';
        echo('ffmpeg -i /home/forbushj/uploadvidd/'.$input.' -an -ss 00:00:45 -an -r 1 -vframes 1 -y -s 150x100 /home/forbushj/public_html/2vidd/'.$output.'.jpg');
 ?>

Here is a link:

http://www.technologyforever.com/clickthisnow.1.php

Check out the date() function at php.net, you're not using it correctly.

You may want to consider $encryptText = date('Y-m-d h:i:s');

File name limitations are based on the operating systems involved, i.e. the server and the user. Macs will have trouble with filenames over 30 chars.

As long as the md5 function is passed the same string to encrypt, it will output the exact same encrypted string.

According to you it is not used correctly?
I am using it correctly
acording to this
http://www.php.net/date
then I am converting it to MD5 but what to do about the length?

What exactly are you trying to do? The way you are using the date function seems incorrect. From the looks of it I think you are trying to generate unique file names but I'm not sure if thats a good approach. If you want a uniqe file name based on time use a timestamp instead of the date function. Is there a reason why you are using a md5 hash rather than just using a simple counter?

I am trying to generate output filenames from ffmpeg via shell access using PHP's Date function then converting the date to md5 so I don't have to worry about files overrighting because it can only be that date once then that date is converted to md5 so the output files don't over right each other.

But I need a way to get shorternames though of any algorithms I can user let me know.

look at this:

PHP Code:

$encryptText = date('dDjLNSwzWFmMntLoYyaABgGhHisueIOPTZcru');
echo ($encryptText); 


output:
10Mon1001th125237September09Sep93002007200707pmPM8 8031503150732uAmerica/Chicago1-0500-05:00CDT-180002007-09-10T15:07:32-05:00Mon, 10 Sep 2007 15:07:32 -0500u

You're not using the date function correctly.

I just looked at what you entered closer. You've entered every option for the date function. So I guess you could say you're using it correctly as each option is valid. However you're not using it efficiently.

Lets say you want to output the mm/dd/yyyy.

PHP Code:

echo (date('m/d/Y')); 


Try playing with some of these options to see the output, and keep in mind you don't have to use them all at the same time .

Originally Posted by goheadtry

I am trying to generate output filenames from ffmpeg via shell access using PHP's Date function then converting the date to md5 so I don't have to worry about files overrighting because it can only be that date once then that date is converted to md5 so the output files don't over right each other.

But I need a way to get shorternames though of any algorithms I can user let me know.

It is still possible to overwrite a file. A hash function given two different inputs can sometimes generate the same output. Its not likely but possible. Instead of using that approach maybe just use a counter.

Use this and there will always be unique filenames!

PHP Code:

list($usec, $sec) = explode(' ', microtime());
$filename = str_replace('.', '', (float)$usec + (float)$sec); 


goheadtry, you are a difficult person to help. It seems you have a fixed idea that there's nothing wrong with your code, but there is. We point it out and you ignore.

I went to the trouble of writing a function to help you with this, did you even attempt to use it? Instead you've taken a completely different tack which seems more convoluted that your first approach.

If you're not going to heed the advice of more experienced coders, why bother asking for help?