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PHP Data Types

PHP Data Types

What you'll learn

  • Understand the main ideas in PHP Data Types.
  • See a working example and explanation to help you learn by doing.
  • Follow a clear path to the next lesson in this topic.

When to use this lesson

Use this lesson when you want to understand the key concepts behind PHP Data Types.

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PHP Data Types

Variables can store data of different types, and different data types can do different things.

PHP supports the following data types:

Finding the Data Type

To inspect the data type and value of a variable, use the var_dump() function. This is an incredibly useful function for debugging!

Example

<?php
$x = 5985;
var_dump($x);


echo "\n";


$y = "Hello";
var_dump($y);
?>

PHP NULL Value

Null is a special data type which can have only one value: NULL.

A variable of data type NULL is a variable that has no value assigned to it. If a variable is created without a value, it is automatically assigned a value of NULL.

Exercise

?

Which function is used to return the data type and value of a variable?

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