将PHP explode分割字符串并将其赋值给一个多维数组。

Question

我想要将一个字符串分解两次，并创建一个多维数组。

$data = "i love funny movies \n i love stackoverflow dot com \n i like rock song";
$data = explode("\n", $data);

因此，print_r($data); 将输出：

Array
(
    [0] => i love funny movies 
    [1] =>  i love stackoverflow com 
    [2] =>  i like rock song
)

现在如果我这样做：

$line_data = explode(" ", $data); // explode $data variable by spaces.

一个 print_r($line_data); 将会给我这样的结果：

Array
(
    [0] => i
    [1] => love
    [2] => funny
    [3] => movies
    [4] => 
    [5] => i
    [6] => love
    [7] => stackoverflow
    [8] => dot
    [9] => com
    [10] => 
    [11] => i
    [12] => like
    [13] => rock
    [14] => song
)

但我想要实现的效果应该像这样：

Array
(
    [0][0] => i
    [0][1] => love
    [0][2] => funny
    [0][3] => movies
    [0][4] => 
    [1][5] => i
    [1][6] => love
    [1][7] => stackoverflow
    [1][8] => dot
    [1][9] => com
    [1][10] => 
    [2][11] => i
    [2][12] => like
    [2][13] => rock
    [2][14] => song
)

在此，第一个索引应表示行号，第二个索引应表示单词数。
如何将字符串分解为这样的数组？

- rakibtg

Answer 1

请执行：

$data = "i love funny movies \n i love stackoverflow dot com \n i like rock song";
$data = explode(" \n ", $data);

$out = array();
$step = 0;
$last = count($data);
$last--;

foreach($data as $key=>$item){

   foreach(explode(' ',$item) as $value){
    $out[$key][$step++] = $value;
   }

   if ($key!=$last){
    $out[$key][$step++] = ' '; // not inserting last "space"
   }

}

print '<pre>';
print_r($out);
print '</pre>';

输出（您所需的内容）：

Array
(
  [0] => Array
    (
        [0] => i
        [1] => love
        [2] => funny
        [3] => movies
        [4] =>  
    )

[1] => Array
    (
        [5] => i
        [6] => love
        [7] => stackoverflow
        [8] => dot
        [9] => com
        [10] =>  
    )

[2] => Array
    (
        [11] => i
        [12] => like
        [13] => rock
        [14] => song
    )

)

- voodoo417

---

$step变量是无用的，你可以使用这种表示法将其附加到数组末尾：$out[$key][] = $value; - Patrick

@cornegigouille 兄弟，怀疑你还没有掌握这个技巧。请尝试在调试/跟踪等模式下逐步执行，看看它是如何工作的，以及为什么不只是 $out[$key][] = $value;。干杯！) - voodoo417

Answer 2

首先，通过换行符将字符串explode成数组。现在你有了一个数组。遍历这个数组的值，并通过空格将每个值explode。下面的代码就是这样做的：

$data = "i love funny movies \n i love stackoverflow dot com \n i like rock song";
$data = explode("\n ", $data);
$num = 0;
foreach($data as &$val){
$exp = explode(" ", $val);
$val = array_combine(range($num, $num+sizeof($exp)-1), $exp);
$num += sizeof($exp);
}
print_r($data);

使用array_search和array_slice的替代解决方案：

$data = "i love funny movies \n i love stackoverflow dot com \n i like rock song";
$data = explode(" ", $data);
$arr = array();
while($search = array_search("\n", array_values($data))){
$arr[] = array_merge(array_slice($data, 0, $search, true), array(""));
$data = array_slice($data, $search+1, null, true);
}
$data = array_merge($arr, array($data));
print_r($data);

输出结果将是：

Array
(
    [0] => Array
        (
            [0] => i
            [1] => love
            [2] => funny
            [3] => movies
            [4] => 
        )

    [1] => Array
        (
            [5] => i
            [6] => love
            [7] => stackoverflow
            [8] => dot
            [9] => com
            [10] => 
        )

    [2] => Array
        (
            [11] => i
            [12] => like
            [13] => rock
            [14] => song
        )

)

- Sharanya Dutta

---

一个 print_r($d); 将会给你这个结果 Array ( [0] => [1] => i [2] => like [3] => rock [4] => song )。 - rakibtg

应该是 print_r($data);。 - Sharanya Dutta

@voodoo417 谢谢你指出来。请看我的更新答案。 - Sharanya Dutta

Answer 3

如果你喜欢快速而不那么正式：

foreach($data = explode("\n",$data) as &$d) {
    $d = explode(' ',$d);
}

- cronoklee

Answer 4

尝试

$data = "i love funny movies \n i love stackoverflow dot com \n i like rock song";
$data = explode("\n", $data);
for($i=0;$i<count($data);$i++){
 $data[$i] = explode(" ",$data[$i]);
}

演示 这里

- Nouphal.M

Answer 5

您可以使用此解决方案而无需使用explode：

   $data = "i love funny movies \n i love stackoverflow dot com \n i like rock song";

   $line_data = explode(" ", $data);

   $arrayLines = [];

   for($i = 0, $j = 0; $i < count($line_data); $i++) {
     if($line_data[$i] != "\n") {
      $arrayLines[$j][$i] = $line_data[$i];
     } else {
       $arrayLines[$j][$i] = $line_data[$i];
       $j++;
     }
   }

   print_r($arrayLines);

- Lucas Reis

Answer 6

$line_data = array();
foreach($data as $key => $d){
  $line_data[$key] = explode(' ', $d);
}

- Zolyboy