foreach

遍历数组利用foreach
foreach($stu as $v)

<?php
$stu=arry['ceshi','test','niubi'];
foreach($stu as $v){
        echo '$v'.'<br>';// 输出 ceshi  test  niubi
}

foreach($stu as $k=>$v)

<?php
$stu=['a','b','c'];

foreach($stu as $k=>$v){
    echo "{$k}:{$v}".'<br>';
};
?>