php中array_map数组回调函数使用例子

function fun($n)
{
return $n * $n * $n;
}

$a = array(1, 2, 3, 4, 5);
$b = array_map('fun', $a); /* 每个数组单元作三次方运算，返回数组 */
print_r($b);
/*
Array
(
[0] => 1
[1] => 8
[2] => 27
[3] => 64
[4] => 125
)
*/

array_map('unlink', glob('*.txt'));/* glob返回"文件名.txt"组成的数组，然后对每个文件进行删除操作*/

array_map('unlink', glob('*.*'));

array_map('unlink', glob('*'));

//单个数组使用的例子
$websites=array("g"=>"google","b"=>"baidu","y"=>"yahoo");
//输出原数组
echo "<pre>";
print_r($websites);
echo "</pre>";
//定义对单个数组处理的回调函数
function change_value($value){
return ucfirst($value).".com";
}
$urls=array_map('change_value',$websites);
echo "<pre>";
print_r($urls);
echo "</pre>";
//多个数组使用的例子
$arr1=array(1,3,5,7);
$arr2=array(2,4,6,8);
//定义对多个数组处理的回调函数
function func1($a,$b){
return $a*$b;
}
$results=array_map('func1',$arr1,$arr2);
echo "利用回调函数对多个数组处理后，返回的结果：<br>";
echo "<pre>";
print_r($results);
echo "</pre>";

yum install sendmail

<?php
$send = mail(‘yourEmail@lisizhang.com’, ‘邮件标题’, ‘测试邮件内容，如果收到此邮件，表示mail函数成功启用！’);
if($send){
echo ‘true’;
}else{
echo ‘false’;
}
?>

<?php

include_once('curl.class.php');
$aa =new Curl('');
 $curlOptions = array(
 CURLOPT_URL => "http://ww.ww.ww/addTicket.jsp", //访问URL
 CURLOPT_RETURNTRANSFER => true, //获取结果作为字符串返回
 CURLOPT_REFERER => "ww.ww.ww/zw2",
 CURLOPT_HTTPHEADER => array('X-FORWARDED-FOR:139.197.14.19', 'CLIENT-IP:127.0.0.1','Proxy-Client-IP:139.197.14.19','WL-Proxy-Client-IP:139.197.14.19' ),
 CURLOPT_HEADER => 1, //获取返回头信息

 //CURLOPT_SSL_VERIFYPEER => false, //支持SSL加密
 CURLOPT_POST => true, //发送时带有POST参数
 CURLOPT_POSTFIELDS => 'ids=897&Submit=%E6%8A%95%E7%A5%A8', //请求的POST参数字符串
 CURLOPT_TIMEOUT => $aa->timeout //等待响应的时间
 );
 echo $aa->getResponseText($curlOptions);

cul处理类

<?php
class Curl
{
public $cookieFile;
public $timeout = 160;

Public function __construct($dir){
$this->cookieFile = $this->getTemporaryCookieFileName($dir);
}

/**
* 设置CURL参数并发送请求，获取响应内容
* @access private
* @param $curlOptions array curl设置参数数组
* @return string|false 访问成功，按字符串形式返回获取的信息；否则返回false
*/
public function getResponseText($curlOptions) {
/* 设置CURLOPT_RETURNTRANSFER为true */
if(!isset($curlOptions[CURLOPT_RETURNTRANSFER]) || $curlOptions[CURLOPT_RETURNTRANSFER] == false) {
$curlOptions[CURLOPT_RETURNTRANSFER] = true;
}
/* 初始化curl模块 */
$curl = curl_init();
/* 设置curl选项 */
curl_setopt_array($curl, $curlOptions);
/* 发送请求并获取响应信息 */
$responseText = '';
try {
$responseText = curl_exec($curl);
if(($errno = curl_errno($curl)) != CURLM_OK) {
$errmsg = curl_error($curl);
throw new Exception($errmsg, $errno);
}
} catch (Exception $e) {
//exceptionDisposeFunction($e);
//print_r($e);
$responseText = false;
}
/* 关闭curl模块 */
curl_close($curl);
/* 返回结果 */
return $responseText;
}

/**
* 将Unicode字符串(u0000)转化为utf-8字符串，工具函数
* @access private
* @static
* @param $string string Unicode字符串
* @return string utf-8字符串
*/
public function unicodeToUtf8($string) {
$string = str_replace('u', '', strtolower($string));
$length = strlen($string) / 4;
$stringResult = '';
for($i = 0; $i < $length; $i++) {
$charUnicodeHex = substr($string, $i * 4, 4);
$unicodeCode = hexdec($charUnicodeHex);
$utf8Code = '';
if($unicodeCode < 128) {
$utf8Code = chr($unicodeCode);
} else if($unicodeCode < 2048) {
$utf8Code .= chr(192 + (($unicodeCode - ($unicodeCode % 64)) / 64));
$utf8Code .= chr(128 + ($unicodeCode % 64));
} else {
$utf8Code .= chr(224 + (($unicodeCode - ($unicodeCode % 4096)) / 4096));
$utf8Code .= chr(128 + ((($unicodeCode % 4096) - ($unicodeCode % 64)) / 64));
$utf8Code .= chr(128 + ($unicodeCode % 64));
}
$stringResult .= $utf8Code;
}
return $stringResult;
}

private function getTemporaryCookieFileName($dir='.') {
return (str_replace("", '/', tempnam($dir, 'tmp')));
}
}

<?php
//curl类
class Curl
{
    function Curl(){
        return true;
    }
    
    function execute($method, $url, $fields='', $userAgent='', $httpHeaders='', $username='', $password=''){
        $ch = Curl::create();
        if(false === $ch){
            return false;
        }
        if(is_string($url) && strlen($url)){
            $ret = curl_setopt($ch, CURLOPT_URL, $url);
        }else{
            return false;
        }
        //是否显示头部信息
        curl_setopt($ch, CURLOPT_HEADER, false);
        //
        curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
        if($username != ''){
            curl_setopt($ch, CURLOPT_USERPWD, $username . ':' . $password);
        }
        $method = strtolower($method);
        if('post' == $method){
            curl_setopt($ch, CURLOPT_POST, true);
            if(is_array($fields)){
                $sets = array();
                foreach ($fields AS $key => $val){
                    $sets[] = $key . '=' . urlencode($val);
                }
                $fields = implode('&',$sets);
            }
            curl_setopt($ch, CURLOPT_POSTFIELDS, $fields);
        }else if('put' == $method){
            curl_setopt($ch, CURLOPT_PUT, true);
        }
        //curl_setopt($ch, CURLOPT_PROGRESS, true);
        //curl_setopt($ch, CURLOPT_VERBOSE, true);
        //curl_setopt($ch, CURLOPT_MUTE, false);
        curl_setopt($ch, CURLOPT_TIMEOUT, 10);//设置curl超时秒数
        if(strlen($userAgent)){
            curl_setopt($ch, CURLOPT_USERAGENT, $userAgent);
        }
        if(is_array($httpHeaders)){
            curl_setopt($ch, CURLOPT_HTTPHEADER, $httpHeaders);
        }
        $ret = curl_exec($ch);
        if(curl_errno($ch)){
            curl_close($ch);
            return array(curl_error($ch), curl_errno($ch));
        }else{
            curl_close($ch);
            if(!is_string($ret) || !strlen($ret)){
                return false;
            }
            return $ret;
        }
    }
    
    function post($url, $fields, $userAgent = '', $httpHeaders = '', $username = '', $password = ''){
        $ret = Curl::execute('POST', $url, $fields, $userAgent, $httpHeaders, $username, $password);
        if(false === $ret){
            return false;
        }
        if(is_array($ret)){
            return false;
        }
        return $ret;
    }
    
    function get($url, $userAgent = '', $httpHeaders = '', $username = '', $password = ''){
        $ret = Curl::execute('GET', $url, '', $userAgent, $httpHeaders, $username, $password);
        if(false === $ret){
            return false;
        }
        if(is_array($ret)){
            return false;
        }
        return $ret;
    }
    
    function create(){
        $ch = null;
        if(!function_exists('curl_init')){
            return false;
        }
        $ch = curl_init();
        if(!is_resource($ch)){
            return false;
        }
        return $ch;
    }
}
?>

用法

GET用法：

$curl = new Curl();
$curl->get(‘http://www.111cn.net/’);

POST用法

$curl = new Curl();
$curl->get(‘http://www.111cn.net/’, ‘p=1&time=0′);

function getrealurl($url){
 $header = get_headers($url,1);
 if (strpos($header[0],'301') || strpos($header[0],'302')) {
  if(is_array($header['Location'])) {
   return $header['Location'][count($header

['Location'])-1];
  }else{
   return $header['Location'];
  }
 }else {
  return $url;
 }
}

$url = 'http://111cn.net';

print_r(get_headers($url));

Array
(
    [0] => HTTP/1.1 301 Moved Permanently
    [1] => Date: Tue, 01 Jul 2014 07:49:26 GMT
    [2] => Server: Apache/2.2.22 (Win32) PHP/5.2.17
    [3] => Location: http://www.111cn.net/
    [4] => Content-Length: 314
    [5] => Content-Type: text/html; charset=iso-8859-1
    [6] => X-Via: 1.1 jszjsx60:8080 (Cdn Cache Server V2.0), 1.1 zb51:6 (Cdn Cache Server V2.0)
    [7] => Connection: close
    [8] => HTTP/1.1 200 OK
    [9] => Date: Tue, 01 Jul 2014 07:49:27 GMT
    [10] => Server: Apache/2.2.22 (Win32) PHP/5.2.17
    [11] => Last-Modified: Tue, 01 Jul 2014 07:41:43 GMT
    [12] => ETag: "7a0000002fe1a1-68a9-4fd1ce83bc0f7"
    [13] => Accept-Ranges: bytes
    [14] => Content-Length: 26793
    [15] => Content-Type: text/html
    [16] => X-Via: 1.1 jszjsx60:8080 (Cdn Cache Server V2.0), 1.1 zb62:5 (Cdn Cache Server V2.0)
    [17] => Connection: close
)

<?php
$str = '这样一来我的字符串就不会有乱码^_^';

echo "mb_substr:" . mb_substr($str, 0, 7, 'utf-8');
//结果：这样一来我的字
echo "<br>";

echo "mb_strcut:" . mb_strcut($str, 0, 6, 'utf-8');
//结果：这样
?>

/**
 *   实现中文字串截取无乱码的方法
 */
function getSubstr($string, $start, $length) {
        if(mb_strlen($string,'utf-8')>$length){
            $str = mb_substr($string, $start, $length,'utf-8');
            return $str.'...';
        }else{
                return $string;
        }
}