二维数组

Question

我们有这些数组......

$cities = array("nagpur","kanpur","delhi","chd","Noida","mumbai","nagpur");
$names = array("munish","imteyaz","ram","shyam","ankit","Rahul","mohan");

现在我想要一个二维数组，其中city的名称为key，所有相应的名称为其值。

<?php
$cities = array("nagpur","kanpur","nagpur","delhi","kanpur");
$names = array("ankit","atul","aman","amit","manu");
foreach ($cities as $i => $value) {
 echo "\n";

 echo $value;
 $city=$value;
 $k=0;
 foreach ($cities as $ii => $m) {
  If($city==$m)
 {
  echo$names[$ii] ;
  $final[$i][$k]=$names[$ii];


  $arr = array($city => array($k =>$names[$ii] ));
   $k++;
 }

 }
 echo"\n<tr></tr>";
}

我试过的是这个。但它不起作用。帮助我

Answer 1

试试这个：

<?php
$cities = array("nagpur","kanpur","nagpur","delhi","kanpur");
$names = array("ankit","atul","aman","amit","manu");

$arr = array();
foreach($cities as $key=>$city) {
    $arr[$city][] = $names[$key];
}
echo "<pre>";
print_r($arr);
?>

让我们知道它是怎么回事。

Answer 2

您不能指望PHP猜测如何配对，现在可以吗？

你真正想做的是：

$final=array(
    "nagpur" => array("munish","imteyaz"),
    "kanpur" => array("ram","shyam"),
    etc.
);

然后，如果你还需要单独的数组，你可以构建那些迭代$final的数组，而不是相反。

完整代码：

$final=array(
    "nagpur" => array("munish","imteyaz"),
    "kanpur" => array("ram","shyam"),
);

$cities=array();
$names=array();
foreach ($final as $city => $nnn) {
    array_push($cities,$city);
    foreach ($nnn as $nn) {
        array_push($names,$nn);
    }
}