如何在 PHP 中将两个特定的数组键和值组合在一起 - how to combine two specific arrays keys and values together, in PHP?

how to combine two specific arrays keys and values together, in PHP?

我有两个有趣的数组，我试图将它们组合在一起。简单来说：

$firstArr
array(3) {
  [0] => array(2) {
    [0] => string(1) "1"
    [1] => string(16) "test1"
  }
  [1] => array(2) {
    [0] => string(1) "8"
    [1] => string(26) "test2"
  }
  [2] => array(2) {
    [0] => string(1) "9"
    [1] => string(23) "test3"
  }
}

$secondArr
array(3) {
  [0] => string(1) "1"
  [1] => string(1) "2"
  [2] => string(1) "3"
}

我想得到的是这样的东西（不是数组）：

$x = 1, 8, 8, 9, 9, 9;
$y = test1, test2, test2, test3, test3, test3;

基本上，第二个数组值指示第一个数组值重复的次数。

有什么想法吗？

$firstArr=array(array("1","test1"),array("8","test2"),array("9","test3"));

$secondArr=array("1","2","3");

$x=$y='';
foreach ($secondArr as $k=>$v){
$x.= str_repeat($firstArr[$k][0].',',$v);
$y.= str_repeat($firstArr[$k][1].',',$v);
}
echo rtrim($x,",").";'n";
echo rtrim($y,",").";";

输出：

1,8,8,9,9,9;
测试1

，测试2，测试2，测试3，测试3，测试3，测试3;

工作演示：

http://codepad.org/yFvWs0Rh