(PHP 8 >= 8.4.0)
ReflectionClass::newLazyProxy — Creates a new lazy proxy instance
Creates a new lazy proxy instance of the class, attaching the
factory function to it. The constructor is not
called, and properties are not set to their default values. When an
attempt is made to observe or modify the proxy's state for the first
time, the factory function is called to provide a real instance, which
is then attached to the proxy. After this, all subsequent interactions
with the proxy are forwarded to the real instance. See
Initialization
Triggers and
Initialization Sequence.
factory
objectobject being initialized. At this point,
the object is no longer marked as lazy, and accessing it does not
trigger initialization again.
options
options can be a combination of the following
flags:
ReflectionClass::SKIP_INITIALIZATION_ON_SERIALIZE
Returns a lazy proxy instance. If the object has no properties, or if all its properties are static or virtual, a normal (non-lazy) instance is returned. See also Lifecycle of Lazy Objects.
示例 #1 Basic usage
<?php
class Example {
public function __construct(public int $prop) {
echo __METHOD__, "\n";
}
}
$reflector = new ReflectionClass(Example::class);
$object = $reflector->newLazyProxy(function (Example $object) {
$realInstance = new Example(1);
return $realInstance;
});
var_dump($object);
var_dump($object instanceof Example);
// Triggers initialization, and forwards the property fetch to the real instance
var_dump($object->prop);
var_dump($object);
?>以上示例会输出：
lazy proxy object(Example)#3 (0) {
["prop"]=>
uninitialized(int)
}
bool(true)
Example::__construct
int(1)
lazy proxy object(Example)#3 (1) {
["instance"]=>
object(Example)#4 (1) {
["prop"]=>
int(1)
}
}