如何創建按交替優先級排序的數組？

Question

我有一個幾乎有50K +子數組的數組。把所有的，爲了優先不是問題，所以我設法使它看起來像這樣：

$SendQueue = array(
    array('3', '+553400000001', 'My text messege here'), 
    array('3', '+553400000002', 'My text messege here'), 
    array('3', '+553400000003', 'My text messege here'), 
    array('3', '+553400000004', 'My text messege here'), 
    array('3', '+553400000005', 'My text messege here'), 
    array('3', '+553400000006', 'My text messege here'), 
    array('3', '+553400000007', 'My text messege here'), 
    array('3', '+553400000008', 'My text messege here'), 
    array('3', '+553400000009', 'My text messege here'), 
    array('3', '+553400000010', 'My text messege here'), 
    array('3', '+553400000011', 'My text messege here'), 
    array('3', '+553400000012', 'My text messege here'), 
    array('2', '+553400000013', 'My text messege here'), 
    array('2', '+553400000014', 'My text messege here'), 
    array('2', '+553400000015', 'My text messege here'), 
    array('2', '+553400000016', 'My text messege here'), 
    array('2', '+553400000017', 'My text messege here'), 
    array('2', '+553400000018', 'My text messege here'), 
    array('1', '+553400000019', 'My text messege here'), 
    array('1', '+553400000020', 'My text messege here'), 
); 
//where '3', '2' and '1' are my priorities' types 

我真正需要的是那些交替sub_arrays，這樣他們就可以是這樣的：

$SendQueue = array(
    array('3', '+553400000001', 'My text messege here'), 
    array('3', '+553400000002', 'My text messege here'), 
    array('3', '+553400000003', 'My text messege here'), 
    array('3', '+553400000004', 'My text messege here'), 
    array('3', '+553400000005', 'My text messege here'), 
    array('3', '+553400000006', 'My text messege here'), 
    array('2', '+553400000013', 'My text messege here'), 
    array('2', '+553400000014', 'My text messege here'), 
    array('2', '+553400000015', 'My text messege here'), 
    array('1', '+553400000019', 'My text messege here'), 
    array('3', '+553400000007', 'My text messege here'), 
    array('3', '+553400000008', 'My text messege here'), 
    array('3', '+553400000009', 'My text messege here'), 
    array('3', '+553400000010', 'My text messege here'), 
    array('3', '+553400000011', 'My text messege here'), 
    array('3', '+553400000012', 'My text messege here'), 
    array('2', '+553400000016', 'My text messege here'), 
    array('2', '+553400000017', 'My text messege here'), 
    array('2', '+553400000018', 'My text messege here'), 
    array('1', '+553400000020', 'My text messege here'), 
); 
//Each 10 sub_arrays, 6 of them are priority '3', 3 of them are priority '2' and 1 of them is priority '1' 

有誰知道該怎麼做？

Answer 1

你可以試試：

//Group the array 
$group = array_reduce($SendQueue, function ($a, $b) { 
    $a[$b[0]][] = $b; 
    return $a; 
}); 


$final = array(); 

while(count($final) < count($SendQueue)) { 
    // 6 of them are priority '3' 
    $final = array_merge($final, array_slice($group[3], 0, 6)); 
    // 3 of them are priority '2' 
    $final = array_merge($final, array_slice($group[2], 0, 3)); 
    // 1 of them are priority '1' 
    $final = array_merge($final, array_slice($group[1], 0, 1)); 
} 

print_r($final); 

See Live Demo