$a1 =array("1"=>"a","2"=>"b","3"=>"c");
$array_a = array();
array_push($array_a, $a1);
foreach($array_a as $v){
$v['4'][1] = $a1;
print(count($v['4']))."<br>";
}
foreach($array_a as $v){
print(count($v['4']));
}
$array_a = array();
array_push($array_a, $a1);
foreach($array_a as $v){
$v['4'][1] = $a1;
print(count($v['4']))."<br>";
}
foreach($array_a as $v){
print(count($v['4']));
}
$array_a = array();
array_push($array_a, $a1);
foreach($array_a as $v){ //在这里根本没有改变过$array_a
$v['4'][1] = $a1;
print(count($v['4'])); //可以在这里print_r($v) ,分析一下
}
foreach($array_a as $v){
print(count($v['4']));
}可以增加一个数组$a1 =array("1"=>"a","2"=>"b","3"=>"c");
$array_a = array();
array_push($array_a, $a1);$array_temp = array() ; //增加一个数组foreach($array_a as $v){
$v['4'][1] = $a1;
print(count($v['4']));
$array_temp[] = $v ;
}print_r($array_temp) ;
注意:
除非数组是被引用,foreach 所操作的是指定数组的一个拷贝,而不是该数组本身。因此数组指针不会被 each() 结构改变,对返回的数组单元的修改也不会影响原数组。不过原数组的内部指针的确在处理数组的过程中向前移动了。假定 foreach 循环运行到结束,原数组的内部指针将指向数组的结尾。