数组

三种数组类型

索引数组关联数组多维数组

count()

<?php$cars=array("Volvo","BMW","SAAB");echo count($cars);//3?>

遍历索引数组

<?php$cars=array("Volvo","BMW","SAAB");$arrlength=count($cars);for($x=0;$x<$arrlength;$x++) {  echo $cars[$x];  echo "<br>";}?>

关联数组

是一种键/值的关系。
创建方法一：

$age=array("Peter"=>"35","Ben"=>"37","Joe"=>"43");

创建方法二：

$age['Peter']="35";$age['Ben']="37";$age['Joe']="43";

遍历关联数组

<?php$age=array("Bill"=>"35","Steve"=>"37","Peter"=>"43");foreach($age as $x=>$x_value) {  echo "Key=" . $x . ", Value=" . $x_value;  echo "<br>";}?>