In this article, we will discuss $GLOBALS in PHP. $GLOBALS is a superglobal variable used to access global variables from anywhere in the PHP program. PHP stores all global variables in an array called $GLOBALS[index].
Syntax:
$GLOBALS['index']=value;
- value is the input value.
- The index is the unique key for a particular value.
Example: PHP Program to demonstrates $GLOBALS.
PHP
<?php // Initialize an index A // and set to 100 $GLOBALS [ 'A' ] = 100;
// Display echo $A ;
echo "<br>" ;
// Initialize an index A // and set to a string $GLOBALS [ 'B' ] = "This is Global" ;
echo "\n" ;
echo $B ;
?> |
Output:
100 This is Global
Example 2: PHP program to perform arithmetic operations using $GLOBALS.
PHP
<?php // Initialize an A index and set to 100 $GLOBALS [ 'A' ] = 100;
// Initialize an B index and set to 200 $GLOBALS [ 'B' ] = 200;
// Display addition echo $GLOBALS [ 'A' ]+ $GLOBALS [ 'B' ];
echo "<br>" ;
// Display subtraction echo $GLOBALS [ 'A' ]- $GLOBALS [ 'B' ];
echo "<br>" ;
// Display multiplication echo $GLOBALS [ 'A' ]* $GLOBALS [ 'B' ];
echo "<br>" ;
// Display division echo $GLOBALS [ 'B' ]/ $GLOBALS [ 'A' ];
echo "\n" ;
?> |
Output:
300 -100 20000 2