这很有趣,你得到NULL - 当我测试你的代码,我得到预期的结果(即非NULL)。 尝试下面的代码,也许这可以工作:(如果没有,请尝试升级您的PHP版本?)
// ----------------------------------------------------
// First try with a simple array, outside a class
// ----------------------------------------------------
$test_array = array(
"string" => "some string" ,
"function" => function() {
echo 'i am an anonymous function outside a Class';
}
);
var_dump($test_array);
// ----------------------------------------------------
// Now try in a Class context
// ----------------------------------------------------
class classContext {
public static $functions = array();
public function __construct() {
self::$functions += array(
"string" => "some string in classContext" ,
"function" => function() {
echo 'i am an anonymous function inside a Class';
}
);
}
}
class secondClass {
public function __construct() {
var_dump(classContext::$functions);
var_dump(classContext::$functions['function']);
}
}
new classContext;
new secondClass;
结果应该如下:
array(2) {
["string"]=>
string(11) "some string"
["function"]=>
object(Closure)#1 (0) {}
}
array(2) {
["string"]=>
string(27) "some string in classContext"
["function"]=>
object(Closure)#3 (1) {
["this"]=> object(classContext)#2 (0) {}
}
}
object(Closure)#3 (1) {
["this"]=> object(classContext)#2 (0) {}
}
第一类的构造函数是永远调用。 – user3409662