10个必须收藏的PHP代码样例

一、黑名单过滤

  1. function is_spam($text, $file, $split = ':', $regex = false){
  2. $handle = fopen($file, 'rb');
  3. $contents = fread($handle, filesize($file));
  4. fclose($handle);
  5. $lines = explode("n", $contents);
  6. $arr = array();
  7. foreach($lines as $line){
  8. list($word, $count) = explode($split, $line);
  9. if($regex)
  10. $arr[$word] = $count;
  11. else
  12. $arr[preg_quote($word)] = $count;
  13. }
  14. preg_match_all("~".implode('', array_keys($arr))."~", $text, $matches);
  15. $temp = array();
  16. foreach($matches[0] as $match){
  17. if(!in_array($match, $temp)){
  18. $temp[$match] = $temp[$match] + 1;
  19. if($temp[$match] >= $arr[$word])
  20. return true;
  21. }
  22. }
  23. return false;
  24. }
  25. $file = 'spam.txt';
  26. $str = 'This string has cat, dog word';
  27. if(is_spam($str, $file))
  28. echo 'this is spam';
  29. else
  30. echo 'this is not spam';
  31. ab:3
  32. dog:3
  33. cat:2
  34. monkey:2

二、随机颜色生成器

  1. function randomColor() {
  2. $str = '#';
  3. for($i = 0 ; $i < 6 ; $i++) {
  4. $randNum = rand(0 , 15);
  5. switch ($randNum) {
  6. case 10: $randNum = 'A'; break;
  7. case 11: $randNum = 'B'; break;
  8. case 12: $randNum = 'C'; break;
  9. case 13: $randNum = 'D'; break;
  10. case 14: $randNum = 'E'; break;
  11. case 15: $randNum = 'F'; break;
  12. }
  13. $str .= $randNum;
  14. }
  15. return $str;
  16. }
  17. $color = randomColor();

三、从网上下载文件

  1. set_time_limit(0);
  2. // Supports all file types
  3. // URL Here:
  4. $url = 'http://somsite.com/some_video.flv';
  5. $pi = pathinfo($url);
  6. $ext = $pi['extension'];
  7. $name = $pi['filename'];
  8. // create a new cURL resource
  9. $ch = curl_init();
  10. // set URL and other appropriate options
  11. curl_setopt($ch, CURLOPT_URL, $url);
  12. curl_setopt($ch, CURLOPT_HEADER, false);
  13. curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
  14. curl_setopt($ch, CURLOPT_AUTOREFERER, true);
  15. curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
  16. curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
  17. // grab URL and pass it to the browser
  18. $opt = curl_exec($ch);
  19. // close cURL resource, and free up system resources
  20. curl_close($ch);
  21. $saveFile = $name.'.'.$ext;
  22. if(preg_match("/[^0-9a-z._-]/i", $saveFile))
  23. $saveFile = md5(microtime(true)).'.'.$ext;
  24. $handle = fopen($saveFile, 'wb');
  25. fwrite($handle, $opt);
  26. fclose($handle);

四、Alexa/Google Page Rank

  1. function page_rank($page, $type = 'alexa'){
  2. switch($type){
  3. case 'alexa':
  4. $url = 'http://alexa.com/siteinfo/';
  5. $handle = fopen($url.$page, 'r');
  6. break;
  7. case 'google':
  8. $url = 'http://google.com/search?client=navclient-auto&ch=6-1484155081&features=Rank&q=info:';
  9. $handle = fopen($url.'http://'.$page, 'r');
  10. break;
  11. }
  12. $content = stream_get_contents($handle);
  13. fclose($handle);
  14. $content = preg_replace("~(ntss+)~",'', $content);
  15. switch($type){
  16. case 'alexa':
  17. if(preg_match('~
    (.+?)
    ~im'
    ,$content,$matches)){
  18. return $matches[2];
  19. }else{
  20. return FALSE;
  21. }
  22. break;
  23. case 'google':
  24. $rank = explode(':',$content);
  25. if($rank[2] != '')
  26. return $rank[2];
  27. else
  28. return FALSE;
  29. break;
  30. default:
  31. return FALSE;
  32. break;
  33. }
  34. }
  35. // Alexa Page Rank:
  36. echo 'Alexa Rank: '.page_rank('techug.com');
  37. echo ' ';
  38. // Google Page Rank
  39. echo 'Google Rank: '.page_rank('techug.com', 'google');

五、强制下载文件

  1. $filename = $_GET['file']; //Get the fileid from the URL
  2. // Query the file ID
  3. $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));
  4. $sql = mysql_query($query);
  5. if(mysql_num_rows($sql) > 0){
  6. $row = mysql_fetch_array($sql);
  7. // Set some headers
  8. header("Pragma: public");
  9. header("Expires: 0");
  10. header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
  11. header("Content-Type: application/force-download");
  12. header("Content-Type: application/octet-stream");
  13. header("Content-Type: application/download");
  14. header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");
  15. header("Content-Transfer-Encoding: binary");
  16. header("Content-Length: ".filesize($row['FileName']));
  17. @readfile($row['FileName']);
  18. exit(0);
  19. }else{
  20. header("Location: /");
  21. exit;
  22. }

六、用Email显示用户的Gravator头像

  1. $gravatar_link = 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32';
  2. echo ''"%20/>';%20

七、用cURL获取RSS订阅数

$ch%20=%20curl_init();%20
  • curl_setopt($ch,CURLOPT_URL,'https://feedburner.google.com/api/awareness/1.0/GetFeedData?id=7qkrmib4r9rscbplq5qgadiiq4');%20
  • curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);%20
  • curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2);%20
  • $content%20=%20curl_exec($ch);%20
  • $subscribers%20=%20get_match('/circulation="(.*)"/isU',$content);%20
  • curl_close($ch);%20
  • %20
  • 八、时间差异计算%20
  • %20
  • function%20ago($time)%20
  • {%20
  • %20%20%20$periods%20=%20array("second",%20"minute",%20"hour",%20"day",%20"week",%20"month",%20"year",%20"decade");%20
  • $lengths%20=%20array("60","60","24","7","4.35","12","10");%20
  • %20
  • $now%20=%20time();%20
  • %20
  • $difference%20=%20$now%20-%20$time;%20
  • $tense%20=%20"ago";%20
  • %20
  • for($j%20=%200;%20$difference%20>=%20$lengths[$j]%20&&%20$j%20<%20count($lengths)-1;%20$j++)%20{%20
  • $difference%20/=%20$lengths[$j];%20
  • }%20
  • %20
  • $difference%20=%20round($difference);%20
  • %20
  • if($difference%20!=%201)%20{%20
  • $periods[$j].=%20"s";%20
  • }%20
  • %20
  • return%20"$difference%20$periods[$j]%20'ago'%20";%20
  • }%20
  • 九、截取图片

    $filename=%20"test.jpg";
  • list($w, $h, $type, $attr) = getimagesize($filename);
  • $src_im = imagecreatefromjpeg($filename);
  • $src_x = '0'; // begin x
  • $src_y = '0'; // begin y
  • $src_w = '100'; // width
  • $src_h = '100'; // height
  • $dst_x = '0'; // destination x
  • $dst_y = '0'; // destination y
  • $dst_im = imagecreatetruecolor($src_w, $src_h);
  • $white = imagecolorallocate($dst_im, 255, 255, 255);
  • imagefill($dst_im, 0, 0, $white);
  • imagecopy($dst_im, $src_im, $dst_x, $dst_y, $src_x, $src_y, $src_w, $src_h);
  • header("Content-type: image/png");
  • imagepng($dst_im);
  • imagedestroy($dst_im);
  • 十、检查网站是否宕机

    1. function Visit($url){
    2. $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();
    3. curl_setopt ($ch, CURLOPT_URL,$url );
    4. curl_setopt($ch, CURLOPT_USERAGENT, $agent);
    5. curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
    6. curl_setopt ($ch,CURLOPT_VERBOSE,false);
    7. curl_setopt($ch, CURLOPT_TIMEOUT, 5);
    8. curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE);
    9. curl_setopt($ch,CURLOPT_SSLVERSION,3);
    10. curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE);
    11. $page=curl_exec($ch);
    12. //echo curl_error($ch);
    13. $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
    14. curl_close($ch);
    15. if($httpcode>=200 && $httpcode<300) return true;
    16. else return false;
    17. }
    18. if (Visit("http://www.google.com"))
    19. echo "Website OK"."n";
    20. else
    21. echo "Website DOWN";

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    郑重声明:本文版权归原作者所有,转载文章仅为传播更多信息之目的,如作者信息标记有误,请第一时间联系我们修改或删除,多谢。

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