Global Variables - Superglobals

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Prakash nidhi Verma · Answer

PHP Global Variables - Superglobals :
it's a predefined variables in PHP which are always accessible of scope and you can access them 
from any function and class.and  The PHP superglobal variables are:and $GLOBALSand $_SERVER
$_REQUEST
$_POST
$_GET
$_FILES
$_ENV
$_COOKIE
$_SESSION
PHP $GLOBALS:
$GLOBALS[index] in PHP it means which is stores all global variables in array. The index holds the 
name of the variable.and 
andlt;?php 
$x =10; 
$y =20;
function addition() { 
and  and  $GLOBALS['z'] = $GLOBALS['x'] + $GLOBALS['y']; 
}
addition(); 
echo $z; 
?andgt;
PHP $_SERVER :
it is holds information about headers, paths and script locations in PHP super global variable.
andlt;?php 
echo $_SERVER['PHP_SELF'];
echo "andlt;brandgt;";
echo $_SERVER['SERVER_NAME'];
echo "andlt;brandgt;";
echo $_SERVER['HTTP_HOST'];
echo "andlt;brandgt;";
echo $_SERVER['HTTP_REFERER'];
echo "andlt;brandgt;";
echo $_SERVER['HTTP_USER_AGENT'];
echo "andlt;brandgt;";
echo $_SERVER['SCRIPT_NAME'];
?andgt;

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Global Variables - Superglobals

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