array_combine（）預計參數1是數組，字符串給出

Question

我想兩個數組與PHP的array_combine()功能結合起來，我收到此錯誤：

array_combine() expects parameter 1 to be array, string given

的$科目的var_dump表明這一點：

array(
    (int) 0 => 'English', 
    (int) 1 => 'Mathematics', 
    (int) 2 => 'Biology', 
    (int) 3 => 'Physics', 
    (int) 4 => 'Chemistry' 
) 

的$定製顯示此的var_dump：

array(
    (int) 0 => array(
     'score' => '72', 
     'grade' => 'B+', 
     'points' => '10' 
), 
    (int) 1 => array(
     'score' => '99', 
     'grade' => 'A', 
     'points' => '12' 
), 
    (int) 2 => array(
     'score' => '77', 
     'grade' => 'A-', 
     'points' => '11' 
), 
    (int) 3 => array(
     'score' => '50', 
     'grade' => 'C+', 
     'points' => '7' 
), 
    (int) 4 => array(
     'score' => '66', 
     'grade' => 'B+', 
     'points' => '10' 
) 
) 

功能：

function score($received,$arr) { 
    $keys = $received; 
    $data_set = array_combine($keys,$arr); 
    return $data_set; 
} 

這裏就是我所說的功能：

$data_set = array_map(array($this->Scores,'score'),$subjects ,custom); 

如果調試顯示所有的變量數組：爲什麼$科目出現作爲字符串array_combine？

編輯：

預期輸出

array(
'English' => array(
    'score' => '72', 
    'grade' => 'B+', 
    'points' => '10' 
), 
'Mathematics' => array(
    'score' => '99', 
    'grade' => 'A', 
    'points' => '12' 
), 
'Biology' => array(
    'score' => '77', 
    'grade' => 'A-', 
    'points' => '11' 
), 
'Physica' => array(
    'score' => '50', 
    'grade' => 'C+', 
    'points' => '7' 
), 
'Chemistry' => array(
    'score' => '66', 
    'grade' => 'B+', 
    'points' => '10' 
) 
) 

Answer 1

當你與預期輸出你不更新你的問題不需要array_map()。只是這樣做：

$data_set = array_combine($subjects, $custom); 

你做什麼，否則就是通過$subjects和$custom所有元素循環。

那麼，你所做的就是這樣每次迭代：

return array_combine("English", ["score" => "72", "grade" => "B+", "points" => "10"]); 
return array_combine("Mathematics", ["score" => "99", "grade" => "A", "points" => "12"]); 
//... 

Answer 2

只是試試這個，不需要額外array_map

$data_set = array_combine($subjects, $custom);