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Question

所以我有，我想，以填補倍數空數組定義的數組，讓我們說

$a_tab = []; 
$b_tab = []; 
$c_tab = []; 

我有一個包含一些數據的數組，讓我們說

$data = ['a' => 'foo', 'b' => 'bar', 'c' => 'foobar']; 

我希望能夠做到這樣的事情：

foreach($data as $key => $value) { 
    $tab_name = $key . '_tab'; // so we have a variable that have the same name as one of the array we declared before 
    $$tab_name[$value] = $value; // this should add 'foo' into $a_tab, 'bar' in $b_tab and 'foobar' in $c_tab 
} 

但是沒有值添加到任何數組...

有人能解釋我我做錯了什麼？

---

PS：如果你不想僞代碼，這裏是我所面臨的問題，我有代碼：

// $tab is a parameter of the current function 

$done_courses = []; // the array where we are going to put every courses that already have been added in one bifurcation tab 

$regex_wz = '/\_werkzoekende/'; 
$regex_bd = '/\_bediende/'; 
$regex_op = '/\_outplacement/'; 

$bifurcation_keys = ['wz_tab' => $regex_wz, 'bd_tab' => $regex_bd, 'op_tab' => $regex_op]; 

// create the 3 arrays 
$wz_tab = []; 
$bd_tab = []; 
$op_tab = []; 

foreach($tab as $key => $value) { 
    foreach($bifurcation_keys as $tab_name => $regex) { 
     if(preg_match($regex, $key)) { 
      $n_k = preg_replace($regex, '', $key); 
      $$tab_name[$n_k] = $value; 
      if(!isset($done_courses[$n_k])) { 
       $done_courses[$n_k] = $n_k; 
      } 
     } 
    } 
} 

Answer 1

你嘗試..

foreach($data as $key => $value) { 
    ${$key.'_tab'}[$value] = $value; 
}