PHP supports 8 data types.
- boolean
- integer
- float (floating-point number, aka double)
- string
- array
- object
- resource
- NULL
Explaination:
4 scalar types:
boolean
<?php
$var = True; // assign the value TRUE to $foo
?>
integer
<?php
$var = 123; // decimal number
$var = -122; // a negative number
$var = 0111; // octal number
$var = 0x1B; // hexadecimal number
?>
float (floating-point number, aka double)
<?php
$var = 1.234;
$var= 1.2e3;
$var = 7E-10;
?>
string
<?php
$string =”Hello World”; // Assign Hello World into $string
?>
2 compound types:
array
<?php
$array = array(“first”=>”Hello”,”second”=>”World”);
echo $array[‘first’];
echo $array[‘second];
?>
object
<?php
Class Interview
{
Function php()
{
Echo “What is php”;
}
}
$obj = new Interview(); // $obj is object , you can also take different name like $object,$interview
Echo $obj-> php();
?>
3 compound types:
resource
NULL
<?php
$variable = NULL;
?>
Note: PHP does not require to define variable in in any specific data type. Like integer,float,string etc, like C,C++.
PHP support automatic type conversion .
For More Detail see Type Juggling articles.
Thank you
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