PHP array call by value and call by address-PHP Tutorial-php.cn

PHP array call by value and call by address

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Release： 2016-07-25 08:53:29

Original

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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) );
}
}
}
}

复制代码

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("+++++++++++++++++++++++++");
?>

复制代码

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("+++++++++++++++++++++++++");
?>

复制代码

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 ) )+++++++++++++++++++++++++