多重循环下怎么防止变量超过数组索引

多重循环下如何防止变量超过数组索引

PHP code

<!--Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->$arr = array(    "0" => "test",    "1" => "test1",    "2" => "test2");$num = count($arr);for($i=0;$i

------解决方案--------------------
foreach ($arr as $index => $value)