<?php
//创建交通工具信息数组$trans
$trans[]=['id'=>612,'name'=>'bus','weight'=>300,'capacity'=>22];
$trans[]=['id'=>158,'name'=>'taxi','weight'=>210,'capacity'=>5];
$trans[]=['id'=>300,'name'=>'coach','weight'=>550,'capacity'=>86];

//打印输出$trans
echo '<pre>';
print_r($trans);

//按效果图输出bus的承载量
echo $trans[0]['name'],'的承载量是:',$trans[0]['capacity'];

//将交通工具motorbike的信息添加到数组
echo '<br/>';
$trans[]=['id'=>105,'name'=>'motorbike','weight'=>'100','capacity'=>2];
print_r($trans);

//按要求修改原名为coach交通工具的信息并输出

$trans[2]['name']='truck';
$trans[2]['weight']=350;

print_r($trans[2]);
//删除bus的载重属性，删除taxi交通工具（操作数组元素）

unset($trans[0]['weight'],$trans[1]);
print_r($trans);
?>