I don't understand why you mark this as a duplicate, there is no correlation between the other problem and mine... To clarify: I dont open up different connections to multiple websites, it's only one domain "example.org/index.php or example.org/download.php" Also there is written you can have 6 simoultaneous connections with chrome, for me even opening download.php two time doesn't work, so that can't be the same problem.
I have a website index.php where you put a link into an inputbox and then you can click a download button. This starts the download.php site which analyzes the link and downloads the file.
My problem is: if i open the index.php in two different tabs and start two downloads then, the second download starts only after the first download is over. It seems like download.php is locked while its being executed by another tab.
For example if i open example.org/youtube-dl/download.php?link=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%abcabcabc&format=mp4
to download a youtube video, the webserver starts processing. But when I want to download another video, lets say defdefdef I open example.org/youtube-dl/download.php?link=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%defdefdef&format=mp3
the webserver dont starts the process. Chrome is loading and when the first download is finished, then download.php is getting executed and the second download starts.
Is it possible to let the download.php executed multiple times in parallel?