<?php $cars = array("porsche","BMW","Volvo"); $num = count($cars); for($i=0;$i<$num;$i++){ echo $cars[$i],"<br>"; } echo "<hr>"; $k = 0; while ($k < $num){ echo $cars[$k],"<br>"; $k = $k + 1; } echo "<hr>"; foreach ($cars as $value){ echo $value,"<br>"; };
foreach最为简单,适合遍历数组。