PHP array call by value and call by address

public class ArrayTest {
    public static void main(String[] args){
        Map[] maparray=new Map[3];
        for (int i = 0; i < maparray.length; i++) {
            Map map=new HashMap();
            map.put("a", i+"_ajkcz");
            map.put("c", "werq_"+i);
            maparray[i]=map;
        }

        System.out.println("++++++++++++++++++++++++");
        for (int i = 0; i < maparray.length; i++) {
            Map map=maparray[i];
            Iterator it=map.keySet().iterator();
            while(it.hasNext()){
                String key=(String) it.next();
                System.out.println(key+"t"+map.get(key) );
            }
        }

        System.out.println("++++++++++++++++++++++++");
        new ArrayCharge().printAndChangeArray(maparray);


        System.out.println("++++++++++++++++++++++++");
        for (int i = 0; i < maparray.length; i++) {
            Map map=maparray[i];
            Iterator it=map.keySet().iterator();
            while(it.hasNext()){
                String key=(String) it.next();
                System.out.println(key+"t"+map.get(key) );
            }
        }
    }
}
class ArrayCharge {
    public void printAndChangeArray(Map[] maparray){
        for (int i = 0; i < maparray.length; i++) {
            Map map=maparray[i];
            map.put("a",i+"________");
        }

        for (int i = 0; i < maparray.length; i++) {
            Map map=maparray[i];
            Iterator it=map.keySet().iterator();
            while(it.hasNext()){
                String key=(String) it.next();
                System.out.println(key+"t"+map.get(key) );
            }
        }
    }
}

控制台输出结果：

$arraytest=array();
for($i=0;$i<3;$i++){
    $child=array();
    $child['keystr']='key'.$i;
    $child['valuestr']='value'.$i;
    $arraytest[]=$child;
}

print_r($arraytest);

print_r("+++++++++++++++++++++++++");
for($i=0;$i    $child=$arraytest[$i];
    $child['valuestr']="_________".$i;
}


print_r($arraytest);

print_r("+++++++++++++++++++++++++");

?>

控制台输出：

$arraytest=array();
for($i=0;$i<3;$i++){
    $child=array();
    $child['keystr']='key'.$i;
    $child['valuestr']='value'.$i;
    $arraytest[]=$child;
}

print_r($arraytest);

print_r("+++++++++++++++++++++++++");
for($i=0;$i    $child=&$arraytest[$i]; //注意这里加了一个指针符号，代表是传址调用
    $child['valuestr']="_________".$i;
}

print_r($arraytest);
print_r("+++++++++++++++++++++++++");
?>

控制台输出：

Array ( [0] => Array ( [keystr] => key0 [valuestr] => value0 ) [1] => Array ( [keystr] => key1 [valuestr] => value1 ) [2] => Array ( [keystr] => key2 [valuestr] => value2 ) ) +++++++++++++++++++++++++ Array ( [0] => Array ( [keystr] => key0 [valuestr] => _________0 ) [1] => Array ( [keystr] => key1 [valuestr] => _________1 ) [2] => Array ( [keystr] => key2 [valuestr] => _________2 ) )+++++++++++++++++++++++++