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Objects

Objects

Object Initialization

To create a new , use the statement to instantiate a class: object``new

Voorbeeld: Object Construction

<?php
class foo
{
    function do_foo()
    {
        echo "Doing foo.";
    }
}

$bar = new foo;
$bar->do_foo();
?>

For a full discussion, see the chapter. Classes and Objects

Converting to object

If an is converted to an , it is not modified. If a value of any other type is converted to an , a new instance of the built-in class is created. If the value was null, the new instance will be empty. An converts to an with properties named by keys and corresponding values. Note that in this case before PHP 7.2.0 numeric keys have been inaccessible unless iterated. object``object``object``stdClass``array``object

Voorbeeld: Casting to an Object

<?php
$obj = (object) array('1' => 'foo');
var_dump(isset($obj->{'1'})); // outputs 'bool(true)'

// Deprecated as of PHP 8.1
var_dump(key($obj)); // outputs 'string(1) "1"'
?>

For any other value, a member variable named will contain the value. scalar

Voorbeeld: cast

<?php
$obj = (object) 'ciao';
echo $obj->scalar;  // outputs 'ciao'
?>
Vorige ← Numeric strings Volgende Relative class types →

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