復制代碼 代碼如下:

<?php
$array=array('a','b','c','d');
foreach($array as $key=>$val){
    //do something
}
echo $val;//輸出d
echo $kay;//輸出3
$val='e';
print_r($array);//輸出Array ( [0] => a [1] => b [2] => c [3] => d )
?>
 

復制代碼 代碼如下:

<?php
$array=array('a','b','c','d');
foreach($array as $key=>&$val){//使用引用
    //do something
}
echo $val;//輸出d
echo $kay;//輸出3
$val='e';
print_r($array);//輸出Array ( [0] => a [1] => b [2] => c [3] => e )
?>