私はSOで提案された回答の多くを読んだり試したりしましたが、どれも問題を解決しません
$array = array('Alpha', 'Beta', 'Gamma');
すべての可能な組み合わせを取得するにはどうすればよいですか?
予想される出力:
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:私が探している答えには、すべての組み合わせとすべての異なる配置が含まれている必要があります。例: 'Alpha Beta'および 'Beta Alpha'は2異なる文字列と両方が出力配列に含まれている必要があります。
前もって感謝します
私はあなたの教授がこの解決策でより幸せになると信じています:
<?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);
?>
これはそれを解決します:
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
)