Return a little usage of the array in PHP

This article explains the return value of the PHP function returned from the learning experience.

Returns a value inside the function with return or NULL to end the function's run. However, when you return an array, you can also use Print_r directly inside the function to print. But generally do not do so.

Take an example of an article:

can also be implemented as follows:

<span style= "Font-family:microsoft yahei;font-size:14px;" ><? PHP      function Bubble ($array) {           $len = count ($array);           if ($len <= 1)           {return $array;}           for ($i = 0; $i < $len; $i + +) {for                 ($j = $len-1; $j > $i; $j-) {                      if ($array [$j] < $array [$j-1]) {                            $tmp = $ar ray[$j];                            $array [$j] = $array [$j-1];                            $array [$j-1] = $tmp;                      }                 }           }           Print_r ($array);       }             $array =array (' A ', ' B ', ' C ', ' e ', ' d ', ' G ', ' f ');      Bubble ($array);     ? ></span>

However, it is better to use the previous article when invoking this:

<span style= "Font-family:microsoft yahei;font-size:14px;" > $a =bubble ($array); Print_r ($a);</span>

Return a little usage of the array in PHP