PHP Data Types

In PHP, a variable's data type is not determined by the developer. At the time of interpretation of the web page, PHP decides the data type of variables.

Numeric Data Type

There are two different numeric data types, which are used for number:

• Integer
• Double (floating point numbers)

Integer Data Type

Integer data type has full number values.

Example:

<?php
$intValue = 100;
?>

Double Data Type

Floating point numbers are the contains Double.

Example:

<?php
$doubValue = 55.5;
?>

String Data Type

String data type contains letters or textual information. Value is assigned to the double or single quotes.

Example:

<?php
    $strName = "Neel";
    $strId = "Neel456";
?>

Converting Between Data Types

Example:

<?php
    $a = 9.88;
    echo (int) $a; // Outputs 9
?>

Values cannot be converted to certain types; for example, you cannot convert any value into a resource. However, you can convert a resource into a numerical or string data type, in which case PHP will return the numeric ID of the resource, or the string Resource id # followed by the resource ID.