Girfa : Student Help

Friday 19 February 2016

Tags - Display HTML code in HTML

There are many times when we want to show HTML tags on our web page mainly when we make some HTML tutorial type application. This enables you to show an HTML code example on your webpage. Following code help you

<xmp>
<h1>Test </h1>
</xmp>

&lt marquee &gt

Raj Kumar

A programmer and Founder of Girfa IT Services, working from 2009.At Starting computer teaching was my full-time job but after 10 years of teaching I chose to programming as a full-time job and teaching become part-time. In real life, I am very lazy and I made it my coding style I always try to make a reusable component that’s my USP for programming which saves my time and extra working both.

Thursday 18 February 2016

PHP Variable Scope

Local Variable

A local variable is accessible only the block where it has defined. When a code block over then the entire local variable inside of block automatically released by the compiler.

<?php

function fun1()

{

$a=10;

echo $a;

}

function fun2()

{

echo $a+10;

// Error : Undefined variable: a because it has not defined in fun2 and a is local variable for fun1

}

<?php

//fun1();

fun2();

Global Variable

The scope of a PHP variable depends on where it has defined I.e. when a variable is declared in top side of the PHP code block, then it becomes global variable for all PHP code block but not inside of a function.