php二维数组中常见的问题

lig

　　二维数组的遍历：
　　1//使用for循环遍历
<?php
<?php
$arr2=array(array("张三","20","男"),array("李四","25","男"),array("王五","19","女"),array("赵六","25","女"));
for($i=0;$i<4;$i++){
for($j=0;$j<3;$j++){
echo $arr2[$i][$j];
}
}
　　?>
2//使用foreach遍历
<?php
$arr = array('one'=>array('name'=>'张三','age'=>'23','sex'=>'男'),
'two'=>array('name'=>'李四','age'=>'43','sex'=>'女'),
'three'=>array('name'=>'王五','age'=>'32','sex'=>'男'),
'four'=>array('name'=>'赵六','age'=>'12','sex'=>'女'));
foreach($arr as $k=>$val){
echo $val['name'].$val['age'].$val['sex']."<br>";
}
echo "<p>";
?>

或者

<?php
$arr = array('one'=>array('name'=>'张三','age'=>'23','sex'=>'男'),
'two'=>array('name'=>'李四','age'=>'43','sex'=>'女'),
'three'=>array('name'=>'王五','age'=>'32','sex'=>'男'),
　　          'four'=>array('name'=>'赵六','age'=>'12','sex'=>'女')
　　         );
foreach($arr as $key=>$value){
foreach($value as $key2=>$value2){
echo $value2;
}
echo "<br>";
}
?>