What are the two types of array in php

$a=array("Timmy","Jimmy");

Is an example of

$a=array(10=>"Jimmy",20=>"mummy");

Is an example of

In php the keyword to be used before function name is

function add()

{

$a=10;

echo $a;}

This is an example for

function add(&a)

{

$a=10;

echo $a;}

$a=33;

This is an example for

<?php

function add()

{

global $a=10;

echo $a;

}

add();

$a+=10;

?>

Output is

$a="deepan";

$b="Deepan";

if(strcmp($a,$b))

{

echo "equal";

}

else{

echo " not equal";}

Output is

$a="IT is favorite department";

$b=sub_string($a,"bes",7,14);

echo $b;

Output is