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How does php judge the request method, php judges the request type (ajax|get|post|cli)

PHP determines the request type, which can be achieved through the parameters related to $_SERVER.

This is very common in the reuse of some request code. The specific code is as follows:, <?php

/**

*@todo: determine whether it is a post

*/

if(!function_exists('is_post')){

function is_post()

{

return isset($_SERVER['REQUEST_METHOD']) && strtoupper($_SERVER['REQUEST_METHOD'])=='POST';

}

}

/**

*@todo: determine whether it is get

*/

if(!function_exists('is_get')){

function is_get()

{

return isset($_SERVER['REQUEST_METHOD']) && strtoupper($_SERVER['REQUEST_METHOD'])=='GET';

}

}

/**

*@todo: determine whether it is ajax

*/

if(!function_exists('is_ajax')){

function is_ajax()

{

return isset($_SERVER['HTTP_X_REQUESTED_WITH']) && strtoupper($_SERVER['HTTP_X_REQUESTED_WITH'])=='XMLHTTPREQUEST';

}

}

/**

*@todo: determine whether it is in command line mode

*/

if(!function_exists('is_cli')){

function is_cli()

{

return (PHP_SAPI === 'cli' OR defined('STDIN'));

}

}

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