php练习01

<?php
echo "<pre>";
  $input = array("php","mysql",array("green","red"));
  $result = array_reverse($input);           //反向排序，不保留数字键
  $result_keyed = array_reverse($input,true);  //反向排序，保留原来的数字键
  var_dump($input);
  /*
  输出:array(3){[0]=>string(3)"php" [1]=>string(5)"mysql"
  [2]=>array(2){[0]=>string(5)"green" [1]=>string(3) "red"}}
  */
  echo '<br />';
  var_dump($result);
  /*
  输出:array(3){[0]=>array(2){[0]=>string(5)"green" [1]=>string(3)"red"}
  [1]=>string(5)"mysql" [2]=>string(3)"php"}
  */
  echo '<br />';
  var_dump($result_keyed);
/*
输出:array(3){[2]=>array(2){[0]=>string(5)"green" [1]=>string(3)"red"}
[1]=>string(5)"mysql" [0]=>string(3)"php"}
*/