PHP：如何獲得1D陣列的所有可能組合？我已經在SO上閱讀/嘗試了很多建議的答案，這些答案都沒有解決問題$array = array('Alpha', 'Beta', 'Gamma');如何獲得所有可能的組合？預期產量：array('Alpha',
'Beta',
'Gamma',
'Alpha Beta',
'Alpha Gamma',
'Beta Alpha',
'Beta Gamma',
'Gamma Alpha',
'Gamma Beta',
'Alpha Beta Gamma',
'Alpha Gamma Beta',
'Beta Alpha Gamma',
'Beta Gamma Alpha',
'Gamma Alpha Beta',
'Gamma Beta Alpha')注意：我正在尋找的答案應包括所有組合和所有不同的安排。例如：'Alpha Beta'和'Beta Alpha'是兩個不同的字符串，兩者都應該在輸出數組中。提前致謝
1 回答
達令說
TA貢獻1821條經驗 獲得超6個贊
我相信你的教授對這個解決方案會更滿意：
<?php
$array = array('Alpha', 'Beta', 'Gamma', 'Sigma');function depth_picker($arr, $temp_string, &$collect) {
if ($temp_string != "")
$collect []= $temp_string;
for ($i=0; $i<sizeof($arr);$i++) {
$arrcopy = $arr;
$elem = array_splice($arrcopy, $i, 1); // removes and returns the i'th element
if (sizeof($arrcopy) > 0) {
depth_picker($arrcopy, $temp_string ." " . $elem[0], $collect);
} else {
$collect []= $temp_string. " " . $elem[0];
}
} }$collect = array();depth_picker($array, "", $collect);print_r($collect);?>這解決了它：
Array( [0] => Alpha [1] => Alpha Beta [2] => Alpha Beta Gamma [3] => Alpha Beta Gamma Sigma [4] => Alpha Beta Sigma [5] => Alpha Beta Sigma Gamma [6] => Alpha Gamma [7] => Alpha Gamma Beta [8] => Alpha Gamma Beta Sigma [9] => Alpha Gamma Sigma [10] => Alpha Gamma Sigma Beta [11] => Alpha Sigma [12] => Alpha Sigma Beta [13] => Alpha Sigma Beta Gamma [14] => Alpha Sigma Gamma [15] => Alpha Sigma Gamma Beta [16] => Beta [17] => Beta Alpha [18] => Beta Alpha Gamma [19] => Beta Alpha Gamma Sigma [20] => Beta Alpha Sigma [21] => Beta Alpha Sigma Gamma [22] => Beta Gamma [23] => Beta Gamma Alpha [24] => Beta Gamma Alpha Sigma [25] => Beta Gamma Sigma [26] => Beta Gamma Sigma Alpha [27] => Beta Sigma [28] => Beta Sigma Alpha [29] => Beta Sigma Alpha Gamma [30] => Beta Sigma Gamma [31] => Beta Sigma Gamma Alpha [32] => Gamma [33] => Gamma Alpha [34] => Gamma Alpha Beta [35] => Gamma Alpha Beta Sigma [36] => Gamma Alpha Sigma [37] => Gamma Alpha Sigma Beta [38] => Gamma Beta [39] => Gamma Beta Alpha [40] => Gamma Beta Alpha Sigma [41] => Gamma Beta Sigma [42] => Gamma Beta Sigma Alpha [43] => Gamma Sigma [44] => Gamma Sigma Alpha [45] => Gamma Sigma Alpha Beta [46] => Gamma Sigma Beta [47] => Gamma Sigma Beta Alpha [48] => Sigma [49] => Sigma Alpha [50] => Sigma Alpha Beta [51] => Sigma Alpha Beta Gamma [52] => Sigma Alpha Gamma [53] => Sigma Alpha Gamma Beta [54] => Sigma Beta [55] => Sigma Beta Alpha [56] => Sigma Beta Alpha Gamma [57] => Sigma Beta Gamma [58] => Sigma Beta Gamma Alpha [59] => Sigma Gamma [60] => Sigma Gamma Alpha [61] => Sigma Gamma Alpha Beta [62] => Sigma Gamma Beta [63] => Sigma Gamma Beta Alpha)
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