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How exactly does this line in the cmd work?

 
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How exactly does this line in the cmd work?, php myprog.php input.txt output.txt
godmoktail
5 Oct, 2008 - 05:34 PM
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Why put it on the line, meanwhile : php myprog.php would work because you have the code to read and write the files that you need (in this case input.txt and output.txt)?

Thanks in advance.
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CTphpnwb
RE: How Exactly Does This Line In The Cmd Work?
5 Oct, 2008 - 05:40 PM
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PHP can take inputs, usually from the keyboard, and output results, usually to a browser. When you run it from the command line, you don't have either, so the inputs have to come from somewhere and the outputs need to go somewhere. That's what those files are for, because without them, it all has to go through the command line interface. While that's possible, it isn't always desirable.
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godmoktail
RE: How Exactly Does This Line In The Cmd Work?
5 Oct, 2008 - 05:54 PM
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I understand that the files are needed, but they would be called for in the php code anyway (using fopen() ). So why would you mention them on the command line?
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JackOfAllTrades
RE: How Exactly Does This Line In The Cmd Work?
5 Oct, 2008 - 06:11 PM
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Because you want the user to be able to specify the names of the files to use, rather than hard-coding them in the script.
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godmoktail
RE: How Exactly Does This Line In The Cmd Work?
5 Oct, 2008 - 06:18 PM
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So I wouldn't have to worry about location. But I would have to know to use those file names within the code. I get it.
Thanks.
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godmoktail
RE: How Exactly Does This Line In The Cmd Work?
5 Oct, 2008 - 07:21 PM
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But how would I get the names if I didn't know what the user was going to type? For example, if someone types "php myprog.php 1.txt 2.txt", how would I get their file names? I want the code to be able to do it all the time with any file passed in.

Thanks in advance.
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CTphpnwb
RE: How Exactly Does This Line In The Cmd Work?
5 Oct, 2008 - 09:31 PM
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It's command line stin and stout. You don't worry about the names within your php code. You worry about getting the input in the file 1.txt lined up with what myprog.php is looking for, then the output goes to 2.txt instead of a browser. It's a bit cumbersome for my tastes, which is why I prefer to use a browser.
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JackOfAllTrades
RE: How Exactly Does This Line In The Cmd Work?
6 Oct, 2008 - 03:29 AM
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Here's the manual page on PHP command line usage. The number of command line arguments will be in the variable $_SERVER['argc'] (argument count) and the arguments themselves will be in $_SERVER['argv'] (argument vector).
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