PHP Datatype Example



Write a PHP program to concatenate a integer and string.
<?php
	$var1= 30;
	$var2 = " Age of John is ";
	echo $var2.$var1;
?>
Get datatype of a variable.
<?php
	$var1 = 299;
	$var2 = 'Hello World';
	echo gettype($var1);
	echo '<br/>';
	echo gettype($var2);
?>
Check integer value.
<?php
	$var1 = 299;
	$var2 = 'Hello World';
	echo is_int($var1);
	echo '<br/>';
	echo is_int($var2);
?>
Check string value.
<?php
	$var1 = 299;
	$var2 = 'Hello World';
	echo is_string($var1);
	echo '<br/>';
	echo is_string($var2);
?>
Example of compound datatype.
<?php
	$arr = array(11, 2, array('John', 'Smith'));
	var_dump($arr);
?>
check resource datatype.
<?php
	$res = mysql_connect();
	$res1 = fopen();
	echo get_resource_type($res);
	echo '<br/>';
	echo get_resource_type($res1);
?>
check null datatype.
<?php
	$a = NULL;
	if(is_null($a)) {
		echo 'Value of a is null';
	}
	echo '<br/>';
?>


Read more articles


General Knowledge



Learn Popular Language