08

<?php //php数组 //1.声明数组 $arr =array(); $arr[0]='hello'; $arr[1]='world'; $arr[2]=2; $arr[3]=3.14; print_r($arr); echo '<br>'; //2.键值对 $obj = array(); $obj['h']='Hello'; $obj['w']='world'; $obj['x']='BowenXu'; echo $obj['x'];//调用 //3.声明的同时赋值 $arr2 = array(0=>'bowen',1=>'xu',2=>2,3=>3.14); print_r($arr2); echo '<br>'; $arr3 =array('h'=>'Hello','w'=>'world','r'=>'rose'); echo $arr3['r'];