帮助处理大数组

Question

我是PHP新手，我正在尝试从字符串中过滤一些单词，使用数组，这里是数组:

$array_lugares = array
(
array("barra"=>array
(
/*SENTIDO BARRA*/
"Sao conrado"=>array("-22.999743","-43.270694"),
"Elevado do Joa"=>array("-22.999429","-43.27317")
),
"zona sul"=>array
(
/*SENTIDO ZONA SUL:*/
"passarela da barra"=>array("-23.008346","-43.303708"),
"barra grill"=>array("-23,010576", "-43,302028"),
"lagoa barra"=>array("-22,997348", "-43,263200")
),
"recreio"=>array
(
/*SENTIDO RECREIO:*/
"passarela da barra"=>array("-23.008283","-43.303634"),
"rio mar"=>array("22.999958","-43.402648"),
"ribalta"=>array("-22,999753", "-43,409211")
)));

当我这样做时:

foreach($array_lugares[0]['zona sul'] as $lugar){
echo $lugar;
echo "</br>";
}

输出为:

Array
Array
Array

我怎样才能让它显示:

barra
zona sul 
recreio

Answer 1

 foreach($array_lugares[0] as $k => $lugar){
   echo $k;
   echo "</br>";
 }

Answer 2

这是因为你有一个多维数组，你也可以循环$lugar;，它会给你正确的输出

更新:

foreach($array_lugares[0]['zona sul'] as $lugar){
   foreach ($lugar as $value) {
     // further inside the array
   }
 echo "</br>"; 
} 

但是我认为你应该重新审视你的代码，看看这是否真的是你想要的方式处理你的数据

Answer 3

这是因为$array_logares[0]['zona sul']给你的是对象

array
(
/*SENTIDO ZONA SUL:*/
"passarela da barra"=>array("-23.008346","-43.303708"),
"barra grill"=>array("-23,010576", "-43,302028"),
"lagoa barra"=>array("-22,997348", "-43,263200")
)

和每个元素是一个数组(点)。如果你想要名字(而不是点数组)，你可以这样做:

foreach(array_keys($array_logares[0]['zona sul']) as $lugar)

如果你想要名字和的点，你可以这样做:

foreach($array_lugares[0] as $name => $lugar)