How to add a value before each line in a txt file?

Hi I have a txt file and 15 000 youtube codes per line like HqiHRC4Q_Ac in it.I want to add "http://www.youtube.com/watch?v=" and create full youtube urls from this codes.

How can I do it ?

I have : video codes

ekJbxA6JOAU
AJWjZ-dOKgI


I want to create full urls like http://www.youtube.com/watch?v=ekJbxA6JOAU

Thanks

 

please help me !

 

Dump your youtube codes text file into a database with a FIELD NAME of "dummy" where the size of the FIELD NAME is long enough for your longest URL then do this:

REPLACE dummy WITH "http://www.youtube.com/watch?v=" + dummy ALL

Then dump your database back to a text file.

 

$url = "http://www.youtube.com/watch?v=";
$file = "youtube.txt";
$f = fopen($file, "r");
while($line = fgets($f, 1000)){
$full_path = $url.$line;
echo $full_path."<br/>";
}

 

thanks for the answers, I did it