php数组

<?php
$phone=array("iphone"=>"4000","xiaomi"=>"2000","vivo"=>"1000");
$arrlength=count($phone);
foreach ($phone as $key=>$value){
    echo "手机 ：".$key." 价值：".$value." ￥<br>";
}

$phone=array("iphone","xiaomi","vivo");
$arrlength=count($phone);
$y=1;
for ($i=0;$i<$arrlength;$i++){
    $z=$i+$y;
    echo "第 $z 部手机是 $phone[$i] <br>";
}
?>

<?php
$price=array("1100","500","4000");
$phone=array("iphone"=>"4000","xiaomi"=>"2000","vivo"=>"1000");
sort($price);//对数组进行升序
rsort($price);//对数组进行降序
$arrlength=count($price);
for ($i=0;$i<$arrlength;$i++){
    echo "$price[$i]<br>";
}
asort($phone);//对数组值进行升序
arsort($phone);//对数组值进行降序
ksort($phone);//对数组键进行升序
krsort($phone);//对数组键进行降序
foreach ($phone as $key=>$value){
    echo $key.":".$value."<br>";
}
?>