> php教程 > php手册 > 实用的PHP代码片段

实用的PHP代码片段

WBOY
풀어 주다: 2016-06-06 19:41:44
원래의
870명이 탐색했습니다.

当你在发送邮件时,你或许很想知道该邮件是否被对方已阅读。这里有段非常有趣的代码片段能够显示对方IP地址记录阅读的实际日期和时间。 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 4

当你在发送邮件时,你或许很想知道该邮件是否被对方已阅读。这里有段非常有趣的代码片段能够显示对方IP地址记录阅读的实际日期和时间。 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

<span></span>

<span>error_reporting(0);</span>

Header("Content-Type: image/jpeg");

 

<span>//Get IP</span>

if (!empty($_SERVER['HTTP_CLIENT_IP']))

<span>{</span>

  $ip=$_SERVER['HTTP_CLIENT_IP'];

<span>}</span>

elseif (!empty($_SERVER['HTTP_X_FORWARDED_FOR']))

<span>{</span>

  $ip=$_SERVER['HTTP_X_FORWARDED_FOR'];

<span>}</span>

<span>else</span>

<span>{</span>

  $ip=$_SERVER['REMOTE_ADDR'];

<span>}</span>

 

<span>//Time</span>

<span>$actual_time = time();</span>

$actual_day = date('Y.m.d', $actual_time);

$actual_day_chart = date('d/m/y', $actual_time);

$actual_hour = date('H:i:s', $actual_time);

 

<span>//GET Browser</span>

$browser = $_SERVER['HTTP_USER_AGENT'];

     

<span>//LOG</span>

$myFile = "log.txt";

$fh = fopen($myFile, 'a+');

$stringData = $actual_day . ' ' . $actual_hour . ' ' . $ip . ' ' . $browser . ' ' "\r\n";

<span>fwrite($fh, $stringData);</span>

<span>fclose($fh);</span>

 

<span>//Generate Image (Es. dimesion is 1x1)</span>

<span>$newimage = ImageCreate(1,1);</span>

<span>$grigio = ImageColorAllocate($newimage,255,255,255);</span>

<span>ImageJPEG($newimage);</span>

<span>ImageDestroy($newimage);</span>

     

<span>?></span>

源码

二、从网友中提取关键字

一段伟大的代码片段能够轻松的从网页中提取关键字。

1

2

3

4

5

6

7

8

9

10

$meta = get_meta_tags('http://www.emoticode.net/');

$keywords = $meta['keywords'];

<span>// Split keywords</span>

$keywords = explode(',', $keywords );

<span>// Trim them</span>

$keywords = array_map( 'trim', $keywords );

<span>// Remove empty values</span>

<span>$keywords = array_filter( $keywords );</span>

 

<span>print_r( $keywords );</span>

源码

三、查找页面上的所有链接

使用DOM,你可以轻松从任何页面上抓取链接,代码示例如下: 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

$html = file_get_contents('http://www.example.com');

 

$dom = new DOMDocument();

<span>@$dom->loadHTML($html);</span>

 

<span>// grab all the on the page</span>

$xpath = new DOMXPath($dom);

$hrefs = $xpath->evaluate("/html/body//a");

 

for ($i = 0; $i length; $i++) {

       $href = $hrefs->item($i);

       $url = $href->getAttribute('href');

       echo $url.'<br>';

<span>}</span>

源码

四、自动转换URL,跳转至超链接

在WordPress中,如果你想自动转换URL,跳转至超链接页面,你可以利用内置的函数make_clickable()执行此操作。如果你想基于WordPress之外操作该程序,那么你可以参考wp-includes/formatting.php源代码。 

1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

17

18

19

20

21

22

23

24

25

26

27

28

29

30

31

32

33

34

35

36

37

38

39

40

41

42

43

44

45

46

function _make_url_clickable_cb($matches) {

    $ret = '';

    $url = $matches[2];

  

    if ( empty($url) )

        return $matches[0];

<span>    </span><span>// removed trailing [.,;:] from URL</span>

    if ( in_array(substr($url, -1), array('.'','';'':')) === true ) {

        $ret = substr($url, -1);

        $url = substr($url, 0, strlen($url)-1);

    }

    return $matches[1] . "<a href="%5C%22%24url%5C%22" rel='\"nofollow\"'>$url</a>" . $ret;

<span>}</span>

  

function _make_web_ftp_clickable_cb($matches) {

    $ret = '';

    $dest = $matches[2];

    $dest = 'http://' . $dest;

  

    if ( empty($dest) )

        return $matches[0];

<span>    </span><span>// removed trailing [,;:] from URL</span>

    if ( in_array(substr($dest, -1), array('.'','';'':')) === true ) {

        $ret = substr($dest, -1);

        $dest = substr($dest, 0, strlen($dest)-1);

    }

    return $matches[1] . "<a href="%5C%22%24dest%5C%22" rel='\"nofollow\"'>$dest</a>" . $ret;

<span>}</span>

  

function _make_email_clickable_cb($matches) {

    $email = $matches[2] . '@' . $matches[3];

    return $matches[1] . "<a href="%5C%22mailto:%24email%5C%22">$email</a>";

<span>}</span>

  

function make_clickable($ret) {

    $ret = ' ' . $ret;

<span>    </span><span>// in testing, using arrays here was found to be faster</span>

    $ret = preg_replace_callback('#([\s>])([\w]+?://[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is''_make_url_clickable_cb', $ret);

    $ret = preg_replace_callback('#([\s>])((www|ftp)\.[\w\\x80-\\xff\#$%&~/.\-;:=,?@\[\]+]*)#is''_make_web_ftp_clickable_cb', $ret);

    $ret = preg_replace_callback('#([\s>])([.0-9a-z_+-]+)@(([0-9a-z-]+\.)+[0-9a-z]{2,})#i''_make_email_clickable_cb', $ret);

  

<span>    </span><span>// this one is not in an array because we need it to run last, for cleanup of accidental links within links</span>

    $ret = preg_replace("#(<a>]+?>|>))</a><a>]+?>([^>]+?)</a>#i""$1$3", $ret);

    $ret = trim($ret);

    return $ret;

<span>}</span>

源码

五、创建数据URL

数据URL可以直接嵌入到HTML/CSS/JS中,以节省大量的 HTTP请求。 下面的这段代码可利用$file轻松创建数据URL。 

1

2

3

4

5

function data_uri($file, $mime) {

  $contents=file_get_contents($file);

  $base64=base64_encode($contents);

  echo "data:$mime;base64,$base64";

<span>}</span>

源码

六、从服务器上下载&保存一个远程图片 

当你在搭建网站时,从远程服务器下载某张图片并且将其保存在自己的服务器上,这一操作会经常用到。代码如下:

1

2

$image = file_get_contents('http://www.url.com/image.jpg');

file_put_contents('/images/image.jpg', $image);<span>//Where to save the image</span>

源码

七、移除Remove Microsoft Word HTML Tag


1

2

3

4

5

6

7

8

9

10

11

12

13

14

15

16

function cleanHTML($html) {

<span>/// <summary></summary></span>

<span>/// Removes all FONT and SPAN tags, and all Class and Style attributes.</span>

<span>/// Designed to get rid of non-standard Microsoft Word HTML tags.</span>

<span>/// </span>

<span>// start by completely removing all unwanted tags</span>

 

$html = ereg_replace("]*>","",$html);

 

<span>// then run another pass over the html (twice), removing unwanted attributes</span>

 

$html = ereg_replace("]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","",$html);

$html = ereg_replace("]*)(class|lang|style|size|face)=("[^"]*"|'[^']*'|[^>]+)([^>]*)>","",$html);

 

return $html

<span>}</span>

源码

八、检测浏览器语言

如果你的网站上有多种语言,那么可以使用这段代码作为默认的语言来检测浏览器语言。该段代码将返回浏览器客户端使用的初始语言。 

1

2

3

4

5

6

7

8

9

10

11

12

13

function get_client_language($availableLanguages, $default='en'){

    if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {

        $langs=explode(',',$_SERVER['HTTP_ACCEPT_LANGUAGE']);

 

        foreach ($langs as $value){

            $choice=substr($value,0,2);

            if(in_array($choice, $availableLanguages)){

                return $choice;

            }

        }

    }

    return $default;

<span>}</span>

源码

九、显示Facebook 粉丝数量

如果你的网站或者博客上有内链的Facebook页面,你或许想知道拥有多少粉丝。这段代码将帮助你查看Facebook粉丝数,记住,别忘了在你的页面ID第二行添加该段代码。 

1

2

3

4

5

6

<span><?php </span></span>

    $page_id = "YOUR PAGE-ID";

    $xml = @simplexml_load_file("http://api.facebook.com/restserver.php?method=facebook.fql.query&query=SELECT%20fan_count%20FROM%20page%20WHERE%20page_id=".$page_id."") or die ("a lot");

    $fans = $xml->page->fan_count;

    echo $fans;

<span>?></span>

원천:php.cn
본 웹사이트의 성명
본 글의 내용은 네티즌들의 자발적인 기여로 작성되었으며, 저작권은 원저작자에게 있습니다. 본 사이트는 이에 상응하는 법적 책임을 지지 않습니다. 표절이나 침해가 의심되는 콘텐츠를 발견한 경우 admin@php.cn으로 문의하세요.
인기 추천
인기 튜토리얼
더>
최신 다운로드
더>
웹 효과
웹사이트 소스 코드
웹사이트 자료
프론트엔드 템플릿