php foreach循环用法介绍_PHP教程

/* php foreach循环简单例子 */   
$a = array('a'=>'网上','b'=>'朋友','c'=>'其它',);   
// 这是一个hash数组,我们现在把内容输出   
foreach ($a as $key => $value) {   
    echo $key . '->' . $value . '
';   
}   
?>  
$a = array('a'=>'网上','b'=>'朋友','c'=>'其它',);

1,"two"=>2,"three"=>3,"four"=>4);
foreach($array1 as $key=>$value)
{echo "KEY:$key value: $value n";}

$array2=array(5,6,7,8);
foreach($array2 as &$value)
{
$value=$value*2;
echo "$valuen";
}

?>

结果是

$array1=array("one"=>1,”two”=>2,”three”=>3,”four”=>4);
foreach($array1 as $key=>$value)
{echo “KEY:$key value: $value n”;}

$array2=array(5,6,7,8);
foreach($array2 as &$value)
{
$value=$value*2;
echo “$valuen”;
}

?>

foreach ($array as &$row) {
$row = explode(‘/’, $row);
}
unset($row);
foreach ($array as $row) {
//do something
}

或者第一个循环这么写

foreach ($array as $key => $row) {
$array[$key] = explode(‘/’, $row);
}