Global variable: $GLOBALS

Example one:

<?php

$a = 1; Declares a global variable $ A with an initial value of 1

$b = 6; Declares a global variable $b with an initial value of 6

Declare a function get (), use global variable $ A and $b in the function body

function Get () {

$GLOBALS [' A ']++;

Global $b; Redefine $b value to null

$b + +;

}

Get (); Call function Get ()

echo "a=". $a. ' <br/> '; $a value output is 2

echo "b=". $b; $b Value Output is 7

?>

Example two:

<?php

Declare a function get (), use global variable $ A and $b in the function body

function Get () {

$a = 1; Declares a global variable $ A with an initial value of 1

$b = 6; Declares a global variable $b with an initial value of 6

$GLOBALS [' A ']++;

Global $b; Redefine $b value to null

$b + +;

}

Get (); Call function Get ()

echo "a=". $a. ' <br/> '; $a value output is 1

echo "b=". $b; $b value Output is 1

?>

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Global variable: $GLOBALS