Monday, 4 June 2018

variable scope in php





<!doctype html>

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<head>

<meta charset="utf-8">

<title>variable scope..</title>

</head>



<body>



<h1>variable scope </h1>



<?php

echo "<h2>Local variable </h2>";



function myfun1()

{

$x=15; //local .......

echo "value of inside the function  x = ".$x;

}





myfun1();

//echo "value of outside the function x = ".$x;



echo "<h2>Global variable </h2>";



$y=10;

$z=20;

function myfun2()

{

//echo "value of y inside the function = ".$y;

}



myfun2();



echo "value of y outside the function = ".$y;





echo "<h2>Global keyword </h2>";

function myfun3()

{

global $y,$z;

$y=$y+$z;

echo "value of y inside the function = ".$y;



}



myfun3();





echo "<h2>static variable </h2>";



function myfun4()

{

static $a=0;

$a++;

echo "value of a inside the function = ".$a."<br/>";





}



myfun4();

myfun4();

myfun4();



?>













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