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Re: Run AWK using shell_exec

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"Dan'l B" <dan.hinckley@gmail.com> writes:
<snip>
> Substituting a variable containing a path-to-the file, I can't seem to
> get the escaping right:
>
> Works:
> $maxLow = shell_exec("/usr/bin/awk 'min==\"\" || $4~/^[^[:alpha:]]+$/
> && $4 < min {min=$4} END{print min}' fullyear.txt");
>
> Fails: (where $tidesFilePath is an absolute path to the fullyear.txt file).
> $tidesFilePath = "/Tidefiles/fullyear.txt"; (example path)
> $maxLow = shell_exec("/usr/bin/awk 'min==\"\" || $4~/^[^[:alpha:]]+$/
> && $4 < min {min=$4} END{print min}'" . $tidesFilePath . \"");

That's not syntactically correct PHP.  I'm not sure what the . \"" bit
at the end is supposed to do, but you don't need it.  You *do* need a
space between the end of the awk script in single quotes and the file
name:

 ... $4 < min {min=$4} END{print min}' " . $tidesFilePath);

But you should be very careful when including variables into a shell
command.  Never forget little Bobby Tables http://www.xkcd.com/327/

-- 
Ben.

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Thread

Run AWK using shell_exec "Dan'l B" <dan.hinckley@gmail.com> - 2015-02-26 14:40 -0800
  Re: Run AWK using shell_exec Jerry Stuckle <jstucklex@attglobal.net> - 2015-02-26 19:50 -0500
    Re: Run AWK using shell_exec "Dan'l B" <dan.hinckley@gmail.com> - 2015-02-26 17:21 -0800
    Re: Run AWK using shell_exec "Dan'l B" <dan.hinckley@gmail.com> - 2015-02-26 17:41 -0800
      Re: Run AWK using shell_exec Jerry Stuckle <jstucklex@attglobal.net> - 2015-02-26 20:51 -0500
      Re: Run AWK using shell_exec Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-27 02:23 +0000
        Re: Run AWK using shell_exec "Dan'l B" <dan.hinckley@gmail.com> - 2015-02-26 19:11 -0800
          Re: Run AWK using shell_exec Matthew Carter <m@ahungry.com> - 2015-02-27 00:28 -0500
          Re: Run AWK using shell_exec Ben Bacarisse <ben.usenet@bsb.me.uk> - 2015-02-27 11:14 +0000
        Re: Run AWK using shell_exec Thomas 'PointedEars' Lahn <PointedEars@web.de> - 2015-02-27 14:17 +0100
          Re: Run AWK using shell_exec "Dan'l B" <dan.hinckley@gmail.com> - 2015-02-27 11:40 -0800
            Re: Run AWK using shell_exec Jerry Stuckle <jstucklex@attglobal.net> - 2015-02-27 16:03 -0500

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