How to differentiate between http and cli requests?

The title is quiet straightforward. I have to know on server side if the script called 开发者_JAVA百科through HTTP request or by command line. I could examine the $_SERVER['argv'] or $_SERVER['argc'].

What is the pragmatic way to do that?

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http://us3.php.net/manual/en/function.php-sapi-name.php

<?php
echo PHP_SAPI;
echo php_sapi_name();
?>

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Look at the keys in $_SERVER. If it is a cli request, you shouldn't see any that start with "HTTP".

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Here is some simple test code:

<?php

foreach( $_SERVER as $k=>$v ){
    echo "$k: $v\n";
}

?>

And here is the output:

aj@mmdev0:~/so$ php cli.php |grep HTTP
aj@mmdev0:~/so$

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Possibly checking if no $_SERVER['HTTP_HOST'] is set? Because I believe that variable is populated through the Request Headers sent to a file on exection, and the command line probably doesn't send headers.

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You can check if the global variable $argc is set.

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I suggest checking if(isset($_SERVER['SERVER_NAME']))

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But you have to send the data through http (tcp) anyway no matter if the script is called from cli or from a browser