Variable Function

gettype => it returns the data type of the arguments...

settype => it sets the data type of the variable and returns the data type of variable.. isset => It Checks the any value is stored in any variable or not it returns true or false.. unset => it will remove the value from the variable.

strval => it returns the string value from given argument. floatval => it returns the float value from given argument. intval => it returns the integer value from given argument. print_r => it prints all the array Value and index of variable.

Gettype / settype	Isset / unset
function fun1()	<?
{	function fun4() {
$var =5000;	$test1 = "hello world";
echo gettype($var);	echo isset($test1)?"Yes":"No"; //value is set
echo “</br>”;	echo "<br>";
echo settype($var,”string”) ;	echo "Value is = ". $test1;
}	unset($test1);
	echo "Value is = ". $test1; //Notice ……
	}
	fun4();
	?>
Output:	Output:
Integer	Yes
string	Value is = hello world
	Notice: Undefined variable: test1 in C:\...\test.php on line 8
	Value is =

Strval / Floatval / Intval	Print_r
<? $num = '12.50abcd'; echo "num is=".$num."<br>"; echo strval($num)."<br>"; //get string value echo floatval($num)."<br>"; //get float value echo intval($num)."<br>";//get integer value ?>	<? $a[0]="hi"; $a[1]="friends"; print_r($a); ?>
Output:	Output:
num is=12.50abcd	Array ( [0] => hi [1] => friends )
12.50abcd
12.5
12