Data type and operator in PHP

PHP Introduction

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Object Oriented PHP

Data Type in PHP

PHP variable declared with $ may store different type of values.There are following data types available in PHP.

1 Integer (to store numeric values without decimal).

2 Float(To store decimal numbers sometimes also known as double).

3 String (To store string values written in single quote or in double quotes).

4 Boolean (It stores true or false only).

5 Array (Array used to store multiple values in a single variable.).

6 Object (Object is an instance of class and may store that class type values).

7 NULL (speial data type Null may store only null values)

8 Resource( special data type store not the value but references.)

Some Example on PHP variable types

 <html>
 <body bgcolor="cyan">
 <center>
 <?php
 $number=10;
 $price=5.5;
 $course="bca";
 $status=true;
 $city = array("Delhi","Noida","Mumbai");
 echo"number=$number "."price=$price "."course=$course" ."status=$status "."city=$city[0]";
 ?>
 </center>
 </body>
 </html>

out put of the above program is as follows

Operator in PHP

Operator is used to make some operation on the operands eg +,- = etc. Mainly used operators in php is as of following types.

1 Arithmetic operator (eg +,-, * ,/ etc).

2 Comparison Operator(To compare values eg. < ,>, <=,>=, == , != etc.).

3 Increment/Decrement Operator (++ , — operates on single operand).

4 Logical operators (and ,or, xor(&& , ||, !) etc ).

5 Assignment Operator(used to store right value to left variable.).

6 String operators (. to concatenates the given strings).

7Array operators (+ union of the arrays, == checks if arrays are equals ,!= check arrays are not equals).

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Data Type in PHP

Some Example on PHP variable types

Operator in PHP

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