php foreach 二维数组遍历下标问题

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代码很简单

<?php   $myarr=array();   $myarr[0]=array(0=>'011',1=>'022',2=>'033',);   $myarr[1]=array(0=>'111',1=>'122',2=>'133',);   $myarr[2]=array(0=>'211',1=>'222',2=>'233',);   $myarr[3]=array(0=>'311',1=>'322',2=>'333',);   $myarr[4]=array(0=>'411',1=>'422',2=>'433',);   $myarr[5]=array(0=>'511',1=>'522',2=>'533',);echo"<pre>";print_r($myarr);foreach($myarr as $key){print_r($key);}?>

下面是输出的结果

Array(    [0] => Array        (            [0] => 011            [1] => 022            [2] => 033        )    [1] => Array        (            [0] => 111            [1] => 122            [2] => 133        )    [2] => Array        (            [0] => 211            [1] => 222            [2] => 233        )    [3] => Array        (            [0] => 311            [1] => 322            [2] => 333        )    [4] => Array        (            [0] => 411            [1] => 422            [2] => 433        )    [5] => Array        (            [0] => 511            [1] => 522            [2] => 533        ))Array(    [0] => 011    [1] => 022    [2] => 033)Array(    [0] => 111    [1] => 122    [2] => 133)Array(    [0] => 211    [1] => 222    [2] => 233)Array(    [0] => 311    [1] => 322    [2] => 333)Array(    [0] => 411    [1] => 422    [2] => 433)Array(    [0] => 511    [1] => 522    [2] => 533)

看到差距了直接输出的有首个下标，而foreach只是在第一个数组下进行的遍历也就是没有首下标

现在比如我们都要用数组表示 511 这个变量myarr的话就是myarr[5][0];而$key只要 $key[1]

就可以了此时 $key就只有一个数组

Array(    [0] => 511    [1] => 522    [2] => 533)

前面都被覆盖掉了

0 0