從匹配的數組鍵創建多維數組

Question

需要通過匹配數組中的鍵來創建多維數組。

陣列1：

[
 'slide_name_1'  => 'lorem ipsum',
 'slide_title_1' => 'lorem ipsum',
 'slide_name_2'  => 'lorem ipsum',
 'slide_title_2' => 'lorem ipsum',
]

我需要創建這個：

[0] => array (
       'slide_name_1'  => 'lorem ipsum 1',
       'slide_title_1' => 'lorem ipsum 1',
       )
[1] => array (
       'slide_name_2'  => 'lorem ipsum 2',
       'slide_title_2' => 'lorem ipsum 2',
       )

我正在考慮運行一些嵌套的foreach循環並僅匹配鍵的數字部分（例如： substr($key, strrpos($key, '_') + 1); ）。

當然，事實證明這比我預期的要困難。 任何建議將不勝感激。

Answer 1

您走在正確的軌道上。 雖然不需要嵌套的foreach循環。 只需使用一個。

喜歡：

$arr = array (
 'slide_name_1'  => 'lorem ipsum',
 'slide_title_1' => 'lorem ipsum',
 'slide_name_2'  => 'lorem ipsum',
 'slide_title_2' => 'lorem ipsum',
);

$result = array();
foreach( $arr as $key => $val ){
    $k = substr($key, strrpos($key, '_') + 1); //Get the number of the string after _

    //Normally, this line is actually optional. But for strict PHP without this will create error.
    //This line will create/assign an associative array with the key $k
    //For example, the $k is 1, This will check if $result has a key $k ( $result[1] ) 
    //If not set, It will assign an array to $result[1] = array()
    if ( !isset( $result[ $k ] ) ) $result[ $k ] = array(); //Assign an array if $result[$k] does not exist

    //Since you already set or initiate array() on variable $result[1] above, You can now push $result[1]['slide_name_1'] = 'lorem ipsum 2';
    $result[ $k ][ $key ] = $val . " " . $k; //Push the appended value ( $value and the number after _ )
}

//Return all the values of an array
//This will convert associative array to simple array(index starts from 0)
$result = array_values( $result ); 

這將導致：

數組

(
    [0] => Array
        (
            [slide_name_1] => lorem ipsum 1
            [slide_title_1] => lorem ipsum 1
        )

    [1] => Array
        (
            [slide_name_2] => lorem ipsum 2
            [slide_title_2] => lorem ipsum 2
        )

)