Detailed explanation of PHP word grouping algorithm implementation

This time I will bring you a detailed explanation of the implementation of the PHP word grouping algorithm. What are the precautions for the implementation of the PHP word grouping algorithm. The following is a practical case, let's take a look.

<?php
//组词算法
function diyWords($arr,$m){
  $result = array();
  if ($m ==1){//只剩一个词时直接返回
    return $arr;
  }
  if ($m == count($arr)){
    $result[] = implode(&#39;&#39; , $arr);
    return $result;
  }
  $temp_firstelement = $arr[0];
  unset($arr[0]);
  $arr = array_values($arr);
  $temp_list1 = diyWords($arr, ($m-1));
  foreach ($temp_list1 as $s){
    $s = $temp_firstelement.$s;
    $result[] = $s;
  }
  $temp_list2 = diyWords($arr, $m);
  foreach ($temp_list2 as $s){
    $result[] = $s;
  }
  return $result;
}
//组词算法
$arr=array(&#39;裤子&#39;,&#39;牛仔&#39;,&#39;低腰&#39;,&#39;加肥&#39;);
$count=count($arr);
for($i=1;$i<=$count;$i++){
  $temp[$i]=diyWords($arr,$i);
}
echo &#39;<pre/>';print_r($temp);

Run result:

Array
(
[1] => Array
(
) [0] => Pants
                                                                                                                       # #                                                                                                                                                       # ] => Denim and fattening
                                                                                                                                                                                                     . Waist
                                                                                                                                                                        . 4] => Array
        (
            [0] => 裤子牛仔低腰加肥
        )
)


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