blocks|key|223314|text|我相信你的教授会对这个解决方案更满意：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|223315|<?php

$array+=+array('Alpha',+'Beta',+'Gamma',+'Sigma');

function+depth_picker($arr,+$temp_string,+&$collect)+{
++++if+($temp_string+!=+"")+
++++++++$collect+[]=+$temp_string;

++++for+($i=0,+$iMax+=+sizeof($arr);+$i+<+$iMax;+$i%2B%2B)+{
++++++++$arrcopy+=+$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);

?>|code-block|syntax|javascript|223316|这就解决了这个问题：|223317|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
)|223318|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I believe your professor will be happier with this solution:

<pre><code>&lt;?php

$array = array('Alpha', 'Beta', 'Gamma', 'Sigma');

function depth_picker($arr, $temp_string, &amp;$collect) {
 if ($temp_string != "") 
 $collect []= $temp_string;

 for ($i=0, $iMax = sizeof($arr); $i &lt; $iMax; $i++) {
 $arrcopy = $arr;
 $elem = array_splice($arrcopy, $i, 1); // removes and returns the i'th element
 if (sizeof($arrcopy) &gt; 0) {
 depth_picker($arrcopy, $temp_string ." " . $elem[0], $collect);
 } else {
 $collect []= $temp_string. " " . $elem[0];
 } 
 } 
}

$collect = array();
depth_picker($array, "", $collect);
print_r($collect);

?&gt;
</code></pre>

This solves it:

<pre><code>Array
(
 [0] =&gt; Alpha
 [1] =&gt; Alpha Beta
 [2] =&gt; Alpha Beta Gamma
 [3] =&gt; Alpha Beta Gamma Sigma
 [4] =&gt; Alpha Beta Sigma
 [5] =&gt; Alpha Beta Sigma Gamma
 [6] =&gt; Alpha Gamma
 [7] =&gt; Alpha Gamma Beta
 [8] =&gt; Alpha Gamma Beta Sigma
 [9] =&gt; Alpha Gamma Sigma
 [10] =&gt; Alpha Gamma Sigma Beta
 [11] =&gt; Alpha Sigma
 [12] =&gt; Alpha Sigma Beta
 [13] =&gt; Alpha Sigma Beta Gamma
 [14] =&gt; Alpha Sigma Gamma
 [15] =&gt; Alpha Sigma Gamma Beta
 [16] =&gt; Beta
 [17] =&gt; Beta Alpha
 [18] =&gt; Beta Alpha Gamma
 [19] =&gt; Beta Alpha Gamma Sigma
 [20] =&gt; Beta Alpha Sigma
 [21] =&gt; Beta Alpha Sigma Gamma
 [22] =&gt; Beta Gamma
 [23] =&gt; Beta Gamma Alpha
 [24] =&gt; Beta Gamma Alpha Sigma
 [25] =&gt; Beta Gamma Sigma
 [26] =&gt; Beta Gamma Sigma Alpha
 [27] =&gt; Beta Sigma
 [28] =&gt; Beta Sigma Alpha
 [29] =&gt; Beta Sigma Alpha Gamma
 [30] =&gt; Beta Sigma Gamma
 [31] =&gt; Beta Sigma Gamma Alpha
 [32] =&gt; Gamma
 [33] =&gt; Gamma Alpha
 [34] =&gt; Gamma Alpha Beta
 [35] =&gt; Gamma Alpha Beta Sigma
 [36] =&gt; Gamma Alpha Sigma
 [37] =&gt; Gamma Alpha Sigma Beta
 [38] =&gt; Gamma Beta
 [39] =&gt; Gamma Beta Alpha
 [40] =&gt; Gamma Beta Alpha Sigma
 [41] =&gt; Gamma Beta Sigma
 [42] =&gt; Gamma Beta Sigma Alpha
 [43] =&gt; Gamma Sigma
 [44] =&gt; Gamma Sigma Alpha
 [45] =&gt; Gamma Sigma Alpha Beta
 [46] =&gt; Gamma Sigma Beta
 [47] =&gt; Gamma Sigma Beta Alpha
 [48] =&gt; Sigma
 [49] =&gt; Sigma Alpha
 [50] =&gt; Sigma Alpha Beta
 [51] =&gt; Sigma Alpha Beta Gamma
 [52] =&gt; Sigma Alpha Gamma
 [53] =&gt; Sigma Alpha Gamma Beta
 [54] =&gt; Sigma Beta
 [55] =&gt; Sigma Beta Alpha
 [56] =&gt; Sigma Beta Alpha Gamma
 [57] =&gt; Sigma Beta Gamma
 [58] =&gt; Sigma Beta Gamma Alpha
 [59] =&gt; Sigma Gamma
 [60] =&gt; Sigma Gamma Alpha
 [61] =&gt; Sigma Gamma Alpha Beta
 [62] =&gt; Sigma Gamma Beta
 [63] =&gt; Sigma Gamma Beta Alpha
)
</code></pre>

<blockquote>
 Possible Duplicate: 
 <a href="https://stackoverflow.com/questions/1256117/algorithm-that-will-take-numbers-or-words-and-find-all-possible-combinations">algorithm that will take numbers or words and find all possible combinations</a> 
 <a href="https://stackoverflow.com/questions/1679605/combinations-dispositions-and-permutations-in-php">Combinations, Dispositions and Permutations in PHP</a> 
</blockquote>



I've read/tried alot of the suggested answers on SO, which none of them solves the problem

<pre><code>$array = array('Alpha', 'Beta', 'Gamma');
</code></pre>

How to get all possible combinations?

Expected output:

<pre><code>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')
</code></pre>

Note: The answer I'm looking for should include all combinations and all different arrangements. For example: 'Alpha Beta' and 'Beta Alpha' are 2 different strings and both should be in the output array.

Thanks in advance

PHP: How to get all possible combinations of 1D array?

 可能重复：我已经阅读/尝试了很多关于SO的建议答案，但它们都不能解决问题$array = array('Alpha', 'Beta', 'Gamma');如何获得所有可能的组合？预期输出：array('Alpha',      'Beta',      'Gamma',      'Alpha Beta',     ...

问PHP:如何获得一维数组的所有可能组合？
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