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PHP Data Types
Example 1: Integer
Explanation:
Integers are whole numbers without a decimal point. In PHP, an integer can be positive or negative.
<?php
$integerVar = 42;
echo $integerVar;
?>
Console Output:
42
Example 2: Float
Explanation:
Floats, also known as floating point numbers, are numbers with a decimal point or a number in exponential form.
<?php
$floatVar = 3.14;
echo $floatVar;
?>
Console Output:
3.14
Example 3: String
Explanation:
Strings are sequences of characters, enclosed in single or double quotes. They are used to store textual data.
<?php
$stringVar = "Hello, World!";
echo $stringVar;
?>
Console Output:
Hello, World!
Example 4: Boolean
Explanation:
Boolean data types represent two states: TRUE or FALSE. They are often used in conditional testing.
<?php
$boolVar = true;
echo $boolVar; // Outputs 1 for TRUE
?>
Console Output:
1
Example 5: Array
Explanation:
Arrays in PHP are used to store multiple values in a single variable. They can be indexed or associative.
<?php
$arrayVar = array("apple", "banana", "cherry");
echo $arrayVar[1]; // Outputs banana
?>
Console Output:
banana
Example 6: Object
Explanation:
Objects are instances of classes, which can hold both data (properties) and functions (methods).
<?php
class Car {
function Car() {
$this->model = "VW";
}
}
$herbie = new Car();
echo $herbie->model;
?>
Console Output:
VW
Example 7: NULL
Explanation:
The NULL data type represents a variable with no value. It is the only possible value of type NULL.
<?php
$nullVar = NULL;
var_dump($nullVar);
?>
Console Output:
NULL
Example 8: Resource
Explanation:
Resources are special variables holding references to external resources like database connections.
<?php
$handle = fopen("file.txt", "r");
var_dump($handle);
fclose($handle);
?>
Console Output:
resource(4) of type (stream)
