array_map实现递归功能

<?php
$tmp = array(' AAAA BBBB CCCC ', 'aaaa bbbb c ', ' dddddd eeeeee');

function array_walk_func(&$v, $k) {
 $v = trim($v);
}
array_walk($tmp, 'array_walk_func');
var_dump($tmp);

function array_map_func($v) {
 return trim($v);
}
$ret = array_map('array_map_func', $tmp);
var_dump($ret);

输出结果：

array(3) {
  [0] =>
  string(14) "AAAA BBBB CCCC"
  [1] =>
  string(11) "aaaa bbbb c"
  [2] =>
  string(13) "dddddd eeeeee"
}
array(3) {
  [0] =>
  string(14) "AAAA BBBB CCCC"
  [1] =>
  string(11) "aaaa bbbb c"
  [2] =>
  string(13) "dddddd eeeeee"
}

<?
$user_info = "+J+++G+++++w";
$fields = preg_split("/+{1,}/", $user_info);
while ($x < sizeof($fields)) :
   print $fields[$x]. "<br>";
   $x++;
endwhile;
?>

$array = array('a','b','c');

echo implode($array);

//结果  abc

$curlPost = 'a=1&b=2';//模拟POST数据
$ch = curl_init();
curl_setopt($ch, CURLOPT_HTTPHEADER, array('X-FORWARDED-FOR:0.0.0.0', 'CLIENT-IP:0.0.0.0'));  //构造IP
curl_setopt($ch, CURLOPT_REFERER, "http://www.111cn.net/");   //构造来路
curl_setopt($ch,CURLOPT_URL, 'http://www.111cn.net');//需要抓取的页面路径
curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
curl_setopt ($ch, CURLOPT_TIMEOUT, 30);
curl_setopt($ch, CURLOPT_POSTFIELDS, $curlPost);//post值

$file_contents = curl_exec($ch);//抓取的内容放在变量中
curl_close($ch)

one();
function one() {    two();     }
function two() {    three();  }
function three() {    print_r( debug_backtrace() );   }
/*输出：
Array(
     [0] => Array        (
            [file] => D:apmservwwwhtdocstestdebugindex.php
            [line] => 10
            [function] => three
            [args] => Array                (                )
      ),
      [1] => Array        (
           [file] => D:apmservwwwhtdocstestdebugindex.php
           [line] => 6
           [function] => two
           [args] => Array                (                )
      ),
      [2] => Array        (
           [file] => D:apmservwwwhtdocstestdebugindex.php
           [line] => 3
           [function] => one
           [args] => Array                (                )
      )
)*/

<?php
echo preg_replace_callback('~-([a-z])~', function ($match) {
    return strtoupper($match[1]);
    }, 'hello-world'
);
// 输出 helloWorld
?>

function test(){
    $num = 2;
    $array = array(1,2,3,4,5,6,7,8);
    print_r(array_filter($array, function($param)  use ($num){
    return $param % intval($num) ==0; })
);}
test();