passing variable to exec function

quky

Ok I am new to php so bear with me
I am trying to pass some variables to an exec function like

<?php 
$val0 = $_GET['tstart']; /// int value
$val1 = $_GET['tduration']; /// int value 
$val2 = $_GET['Rname'];  /// string value
//// cropfile.php?tstart=30&tduration=40&Rname=foo.mp3 
echo "the word is:  $val0  and $val1"; 
exec('ffmpeg -ss intval($val0) -t intval($val1) -i Rname -acodec copy newfoo.mp3 2>&1 &', $out, $rv); 
echo "output is:<br>\n".implode("<br>\n", $out)."<br>\nexit code:$rv<br>\n";
?>

And for some reason is not taken the values

What I am missing here
Best Regards
HP 😃

bradgrafelman

Can you echo out this string:

'ffmpeg -ss intval($val0) -t intval($val1) -i Rname -acodec copy newfoo.mp3 2>&1 &'

and show us the output?

EDIT: Woops, now I see it. Echo out that string and you should see the problem if you read it carefully.

You can't stick a PHP function (e.g. [man]intval/man) inside of a string and expect PHP to look through the string and execute whatever it think might be PHP code. Either do the intval() when you assign the value to the variable, or use concatenation (see manual page [man]string[/man] or [man]operators.string[/man] for more info on that).

quky

bradgrafelman;10984417 wrote:
Can you echo out this string:
'ffmpeg -ss intval($val0) -t intval($val1) -i Rname -acodec copy newfoo.mp3 2>&1 &'
and show us the output?

EDIT: Woops, now I see it. Echo out that string and you should see the problem if you read it carefully.

You can't stick a PHP function (e.g. [man]intval/man) inside of a string and expect PHP to look through the string and execute whatever it think might be PHP code. Either do the intval() when you assign the value to the variable, or use concatenation (see manual page [man]string[/man] or [man]operators.string[/man] for more info on that).

'ffmpeg -ss intval(30) -t intval(40) -i Rname -acodec copy newfoo.mp3 2>&1 &'

bradgrafelman

Did you read the 'EDIT:' part of my post? I already noted what your problem was as well as how to solve it.