PHP： 數組轉字符串，與字符串轉數組

     PHP 數組轉字符串，與字符串轉數組 

• implode 使用一個字符串將數組變成字符串

  $array = array('lastname', 'email', 'phone');
  $comma_separated = implode(",", $array);
   
  echo $comma_separated; // lastname,email,phone
   
  // Empty string when using an empty array:
  var_dump(implode('hello', array())); // string(0) ""

   

• explode  使用一個字符串分割另一個字符串，返回一個數組

  // 示例 1
  $pizza  = "piece1 piece2 piece3 piece4 piece5 piece6";
  $pieces = explode(" ", $pizza);
  echo $pieces[0]; // piece1
  echo $pieces[1]; // piece2
   
  // 示例 2
  $data = "foo:*:1023:1000::/home/foo:/bin/sh";
  list($user, $pass, $uid, $gid, $gecos, $home, $shell) = explode(":", $data);
  echo $user; // foo
  echo $pass; // *

   

• str_split — 將字符串轉換爲數組 

  $str = "Hello Friend";
   
  $arr1 = str_split($str);
  $arr2 = str_split($str, 3);
   
  print_r($arr1);
  print_r($arr2);
  輸出結果
  Array
  (
      [0] => H
      [1] => e
      [2] => l
      [3] => l
      [4] => o
      [5] =>
      [6] => F
      [7] => r
      [8] => i
      [9] => e
      [10] => n
      [11] => d
  )
   
  Array
  (
      [0] => Hel
      [1] => lo
      [2] => Fri
      [3] => end
  )