Question

我写了一个php代码，我用这个代码编写一个这样的数组：

Array
(
    [0] => Men's 100 metres

    [1] => Tom Burke

    [2] => Fritz Hofmann

    [3] => Array
        (
            [0] => Alajos Szokoly

            [1] => Frank Lane

        )

)

我知道这个数组元素的值总是在同一个位置：

Position 0 --> the event sport
Position 1 --> who won gold medal
Position 2 --> who won silver medal
Position 3 --> who won bronze medal

2名或更多运动员有可能获得金牌，或者2名或更多运动员可以赢得银牌。以上只是一个例子。

所以我想得到这个结果：

$gender = Men
$event =  100 metres
$athlete = Tom Burke
$medal = Gold

Second loop:

$gender = Men
$event =  100 metres
$athlete = Fritz Hofmann
$medal = Silver

Third loop:
 first internal loop:

   $gender = Men
   $event =  100 metres
   $athlete = Alajos Szokoly
   $medal = Bronze

 second internal loop:

   $gender = Men
   $event =  100 metres
   $athlete = Frank Lane
   $medal = Bronze

我该怎么办？

Answer 1

在遍历时，您只需检查值是否为数组。如果它，那就让它遍历吧。

$a = array(
"Men's 100 metres",
"Tom Burke",
"Fritz Hofmann",
array("Alajos Szokoly", "Frank Lane"));

foreach( $a as $key => $value ){
if(is_array($value)){
    foreach($value as $k=>$v){
        echo $k."\t=>\t".$v."\n";
    }
} else {
    echo $key."\t=>\t".$value."\n";
}

}

Answer 2

我建议将数据结构转换为您的需求，如下所示：

// Sample data:
$events = [
  ["Men's 100 metres", "Tom Burke", "Fritz Hofmann", ["Alajos Szokoly", "Frank Lane"]],
  ["Men's 200 metres", ["John", "Mark"], "James", "Patrick"]
];

// Conversion:
$medals = ["gold", "silver", "bronze"];
foreach ($events as $row) {
    $gender = "";
    $event = array_shift($row);
    if (strpos($event, "'s ") > 0) {
        list($gender, $event) = explode("'s ", $event);
    }
    foreach ($row as $i => $athletes) {
        if (!is_array($athletes)) $athletes = [$athletes];
        foreach($athletes as $athlete) {
            $result[] = [
                "gender" => $gender,
                "event" => $event,
                "athlete" => $athlete,
                "medal" => $medals[$i]
            ];
        }
    }
}

之后你将拥有$result数组，如下所示：

[
  [
    'gender' => 'Men',
    'event' => '100 metres',
    'athlete' => 'Tom Burke',
    'medal' => 'gold',
  ],
  [
    'gender' => 'Men',
    'event' => '100 metres',
    'athlete' => 'Fritz Hofmann',
    'medal' => 'silver',
  ],
  [
    'gender' => 'Men',
    'event' => '100 metres',
    'athlete' => 'Alajos Szokoly',
    'medal' => 'bronze',
  ],
  [
    'gender' => 'Men',
    'event' => '100 metres',
    'athlete' => 'Frank Lane',
    'medal' => 'bronze',
  ],
  [
    'gender' => 'Men',
    'event' => '200 metres',
    'athlete' => 'John',
    'medal' => 'gold',
  ],
  [
    'gender' => 'Men',
    'event' => '200 metres',
    'athlete' => 'Mark',
    'medal' => 'gold',
  ],
  [
    'gender' => 'Men',
    'event' => '200 metres',
    'athlete' => 'James',
    'medal' => 'silver',
  ],
  [
    'gender' => 'Men',
    'event' => '200 metres',
    'athlete' => 'Patrick',
    'medal' => 'bronze',
  ],
]

这很容易输出。

如何在变量中解析数组和存储的值

2 个答案: