How to filter $_SERVER['REQUEST_METHOD']

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Is it safe to check if a form is submitted with below code?

PHP

if( $_SERVER['REQUEST_METHOD'] === 'POST' )

When I write this in Netbeans it suggests to use some filtering function. Is it necessary to do something like

PHP

$RequestMethod = filter_input(INPUT_SERVER, 'REQUEST_METHOD', FILTER_SANITIZE_STRING);
if ( $RequestMethod === 'POST' )
{
// Form data is posted to the page so ...
}

And I don't clearly understand the 3rd parameter here. What kind of filtering should I use?

Posted 11-May-15 22:19pm

cs101000

Updated 12-May-15 22:24pm

v3

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Comments

ZurdoDev 12-May-15 8:41am

Why do you want to know this? In all my years doing web development I don't recall ever needing to do this so perhaps what you want should be done a different way.

cs101000 12-May-15 9:12am

Well, I usually put the form submission logic in this 'if' block in order to make sure this is executed only when the form is submitted (and not when it is loaded for user input). I think this will make it more efficient and accurate, won't it? You are probably doing that with isset function.

ZurdoDev 12-May-15 9:28am

Maybe this is a php thing so perhaps it is more common. I do not do php.

Mohibur Rashid 13-May-15 4:44am

Why bothering with REQUEST_METHOD at all? If your request_method has anything other than GET, POST, HEADER OR DELETE then your apache will deal with it. There is a chance that your apache settings won't allow DELETE at all. For method HEADER i am not sure who handle. Why calling extra function to deal with it?

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