<?php

//创建交通工具信息数组$trans

$trans[]=['id'=>612,'name'=>'bus','weight'=>300,'capacity'=>22];

$trans[]=['id'=>1580,'name'=>'taxi','weight'=>210,'capacity'=>5];

$trans[]=['id'=>300,'name'=>'coach','weight'=>550,'capacity'=>86];

//打印输出$trans

print_r($trans);

echo '<br/>';

//按效果图输出bus的承载量

echo 'bus的承载量:'.$trans[0]['capacity'];

//将交通工具motorbike的信息添加到数组

echo '<br/>';

$trans[3]=['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

echo '<br/>';

$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']);

unset($trans[1]);

print_r($trans);

?>