php 获取对象的所有属性_PHP: Object 对象 - Manual

* Used for checking empty objects/array

* @uses How to check empty objects and array in php code

* @author Aditya Mehrotra

*/

/**

* Empty class

*/classEmptyClass{

}$obj= newstdClass();//or any other class empty object$emptyClassObj= newEmptyClass();$array= array();

if (empty($array)) {

echo'array is empty';//expected result} else {

echo'array is not empty';//unexpected result}

echo"
";

if (empty($obj)) {

echo'object is empty';//expected result} else {

echo'object is not empty';//unexpected result}

echo"
";

if (empty($emptyClassObj)) {

echo'EmptyClass is empty';//expected result} else {

echo'EmptyClass is not empty';//unexpected result}

echo"
";//Result SET 1

//array is empty      => expected result

//object is not empty => ouch what happened

//EmptyClass is not empty => ouch what happened

/**

* So what we do for checking empty object

* @solution use any known property or check property count

* Or you can use below method

* Count function will not return 0 in empty object

*/

//Below line print "Object count:1"echo'Object count:'.count($obj);

echo"
";/**

* This function is used to get object item counts

* @function getCount

* @access public

* @param object|array $var

* @return integer

*/functiongetCount($var) {$count=0;

if (is_array($var) ||is_object($var)) {

foreach ($varas$value) {$count++;

}

}

unset($value);

return$count;

}//Running code again with new logicif (getCount($array) ===0) {

echo'array is empty';//expected result} else {

echo'array is not empty';//unexpected result}

echo"
";

if (getCount($obj) ===0) {

echo'object is empty';//expected result} else {

echo'object is not empty';//unexpected result}

echo"
";

if (getCount($emptyClassObj) ===0) {

echo'EmptyClass is empty';//expected result} else {

echo'EmptyClass is not empty';//unexpected result}//Result SET 2

//array is empty    => expected result  ##everything is all right

//object is empty   => expected result  ##everything is all right

//EmptyClass is empty   => expected result  ##everything is all right