At example #2: the comment // int(2) is stated while the value for the private property is actually 3. (private $z = 3;)
var_dump($prop->getValue($obj)); // This should be int(3)
(PHP 5, PHP 7, PHP 8)
ReflectionProperty::__construct — Construct a ReflectionProperty object
classEither a string containing the name of the class to reflect, or an object.
propertyThe name of the property being reflected.
Trying to get or set private or protected class property's values will result in an exception being thrown.
示例 #1 ReflectionProperty::__construct() example
<?php
class Str
{
public $length = 5;
}
// Create an instance of the ReflectionProperty class
$prop = new ReflectionProperty('Str', 'length');
// Print out basic information
printf(
"===> The%s%s%s%s property '%s' (which was %s)\n" .
" having the modifiers %s\n",
$prop->isPublic() ? ' public' : '',
$prop->isPrivate() ? ' private' : '',
$prop->isProtected() ? ' protected' : '',
$prop->isStatic() ? ' static' : '',
$prop->getName(),
$prop->isDefault() ? 'declared at compile-time' : 'created at run-time',
var_export(Reflection::getModifierNames($prop->getModifiers()), true)
);
// Create an instance of Str
$obj= new Str();
// Get current value
printf("---> Value is: ");
var_dump($prop->getValue($obj));
// Change value
$prop->setValue($obj, 10);
printf("---> Setting value to 10, new value is: ");
var_dump($prop->getValue($obj));
// Dump object
var_dump($obj);
?>以上示例的输出类似于：
===> The public property 'length' (which was declared at compile-time)
having the modifiers array (
0 => 'public',
)
---> Value is: int(5)
---> Setting value to 10, new value is: int(10)
object(Str)#2 (1) {
["length"]=>
int(10)
}
示例 #2 Getting value from private and protected properties using ReflectionProperty class
<?php
class Foo
{
public $x = 1;
protected $y = 2;
private $z = 3;
}
$obj = new Foo;
$prop = new ReflectionProperty('Foo', 'y');
$prop->setAccessible(true);
var_dump($prop->getValue($obj)); // int(2)
$prop = new ReflectionProperty('Foo', 'z');
$prop->setAccessible(true);
var_dump($prop->getValue($obj)); // int(2)
?>以上示例的输出类似于：
int(2) int(3)
At example #2: the comment // int(2) is stated while the value for the private property is actually 3. (private $z = 3;)
var_dump($prop->getValue($obj)); // This should be int(3)