一、黑名单过滤

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- function is_spam($text, $file, $split = ':', $regex = false){
 - $handle = fopen($file, 'rb');
 - $contents = fread($handle, filesize($file));
 - fclose($handle);
 - $lines = explode("n", $contents);
 - $arr = array();
 - foreach($lines as $line){
 - list($word, $count) = explode($split, $line);
 - if($regex)
 - $arr[$word] = $count;
 - else
 - $arr[preg_quote($word)] = $count;
 - }
 - preg_match_all("~".implode('|', array_keys($arr))."~", $text, $matches);
 - $temp = array();
 - foreach($matches[0] as $match){
 - if(!in_array($match, $temp)){
 - $temp[$match] = $temp[$match] + 1;
 - if($temp[$match] >= $arr[$word])
 - return true;
 - }
 - }
 - return false;
 - }
 - $file = 'spam.txt';
 - $str = 'This string has cat, dog word';
 - if(is_spam($str, $file))
 - echo 'this is spam';
 - else
 - echo 'this is not spam';
 - ab:3
 - dog:3
 - cat:2
 - monkey:2
 
二、随机颜色生成器
- function randomColor() {
 - $str = '#';
 - for($i = 0 ; $i < 6 ; $i++) {
 - $randNum = rand(0 , 15);
 - switch ($randNum) {
 - case 10: $randNum = 'A'; break;
 - case 11: $randNum = 'B'; break;
 - case 12: $randNum = 'C'; break;
 - case 13: $randNum = 'D'; break;
 - case 14: $randNum = 'E'; break;
 - case 15: $randNum = 'F'; break;
 - }
 - $str .= $randNum;
 - }
 - return $str;
 - }
 - $color = randomColor();
 
三、从网上下载文件
- set_time_limit(0);
 - // Supports all file types
 - // URL Here:
 - $url = 'http://somsite.com/some_video.flv';
 - $pi = pathinfo($url);
 - $ext = $pi['extension'];
 - $name = $pi['filename'];
 - // create a new cURL resource
 - $ch = curl_init();
 - // set URL and other appropriate options
 - curl_setopt($ch, CURLOPT_URL, $url);
 - curl_setopt($ch, CURLOPT_HEADER, false);
 - curl_setopt($ch, CURLOPT_BINARYTRANSFER, true);
 - curl_setopt($ch, CURLOPT_AUTOREFERER, true);
 - curl_setopt($ch, CURLOPT_FOLLOWLOCATION, true);
 - curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
 - // grab URL and pass it to the browser
 - $opt = curl_exec($ch);
 - // close cURL resource, and free up system resources
 - curl_close($ch);
 - $saveFile = $name.'.'.$ext;
 - if(preg_match("/[^0-9a-z._-]/i", $saveFile))
 - $saveFile = md5(microtime(true)).'.'.$ext;
 - $handle = fopen($saveFile, 'wb');
 - fwrite($handle, $opt);
 - fclose($handle);
 
四、Alexa/Google Page Rank
- function page_rank($page, $type = 'alexa'){
 - switch($type){
 - case 'alexa':
 - $url = 'http://alexa.com/siteinfo/';
 - $handle = fopen($url.$page, 'r');
 - break;
 - case 'google':
 - $url = 'http://google.com/search?client=navclient-auto&ch=6-1484155081&features=Rank&q=info:';
 - $handle = fopen($url.'http://'.$page, 'r');
 - break;
 - }
 - $content = stream_get_contents($handle);
 - fclose($handle);
 - $content = preg_replace("~(n|t|ss+)~",'', $content);
 - switch($type){
 - case 'alexa':
 - if(preg_match('~
 ~im',$content,$matches)){(.+?) - return $matches[2];
 - }else{
 - return FALSE;
 - }
 - break;
 - case 'google':
 - $rank = explode(':',$content);
 - if($rank[2] != '')
 - return $rank[2];
 - else
 - return FALSE;
 - break;
 - default:
 - return FALSE;
 - break;
 - }
 - }
 - // Alexa Page Rank:
 - echo 'Alexa Rank: '.page_rank('techug.com');
 - echo ' ';
 - // Google Page Rank
 - echo 'Google Rank: '.page_rank('techug.com', 'google');
 
五、强制下载文件
- $filename = $_GET['file']; //Get the fileid from the URL
 - // Query the file ID
 - $query = sprintf("SELECT * FROM tableName WHERE id = '%s'",mysql_real_escape_string($filename));
 - $sql = mysql_query($query);
 - if(mysql_num_rows($sql) > 0){
 - $row = mysql_fetch_array($sql);
 - // Set some headers
 - header("Pragma: public");
 - header("Expires: 0");
 - header("Cache-Control: must-revalidate, post-check=0, pre-check=0");
 - header("Content-Type: application/force-download");
 - header("Content-Type: application/octet-stream");
 - header("Content-Type: application/download");
 - header("Content-Disposition: attachment; filename=".basename($row['FileName']).";");
 - header("Content-Transfer-Encoding: binary");
 - header("Content-Length: ".filesize($row['FileName']));
 - @readfile($row['FileName']);
 - exit(0);
 - }else{
 - header("Location: /");
 - exit;
 - }
 
六、用Email显示用户的Gravator头像
- $gravatar_link = 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32';
 - echo '
 ';
七、用cURL获取RSS订阅数
- $ch = curl_init();
 - curl_setopt($ch,CURLOPT_URL,'https://feedburner.google.com/api/awareness/1.0/GetFeedData?id=7qkrmib4r9rscbplq5qgadiiq4');
 - curl_setopt($ch,CURLOPT_RETURNTRANSFER,1);
 - curl_setopt($ch,CURLOPT_CONNECTTIMEOUT,2);
 - $content = curl_exec($ch);
 - $subscribers = get_match('/circulation="(.*)"/isU',$content);
 - curl_close($ch);
 - 八、时间差异计算
 - function ago($time)
 - {
 - $periods = array("second", "minute", "hour", "day", "week", "month", "year", "decade");
 - $lengths = array("60","60","24","7","4.35","12","10");
 - $now = time();
 - $difference = $now - $time;
 - $tense = "ago";
 - for($j = 0; $difference >= $lengths[$j] && $j < count($lengths)-1; $j++) {
 - $difference /= $lengths[$j];
 - }
 - $difference = round($difference);
 - if($difference != 1) {
 - $periods[$j].= "s";
 - }
 - return "$difference $periods[$j] 'ago' ";
 - }
 
九、截取图片
- $filename= "test.jpg";
 - list($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
- function Visit($url){
 - $agent = "Mozilla/4.0 (compatible; MSIE 5.01; Windows NT 5.0)";$ch=curl_init();
 - curl_setopt ($ch, CURLOPT_URL,$url );
 - curl_setopt($ch, CURLOPT_USERAGENT, $agent);
 - curl_setopt ($ch, CURLOPT_RETURNTRANSFER, 1);
 - curl_setopt ($ch,CURLOPT_VERBOSE,false);
 - curl_setopt($ch, CURLOPT_TIMEOUT, 5);
 - curl_setopt($ch,CURLOPT_SSL_VERIFYPEER, FALSE);
 - curl_setopt($ch,CURLOPT_SSLVERSION,3);
 - curl_setopt($ch,CURLOPT_SSL_VERIFYHOST, FALSE);
 - $page=curl_exec($ch);
 - //echo curl_error($ch);
 - $httpcode = curl_getinfo($ch, CURLINFO_HTTP_CODE);
 - curl_close($ch);
 - if($httpcode>=200 && $httpcode<300) return true;
 - else return false;
 - }
 - if (Visit("http://www.google.com"))
 - echo "Website OK"."n";
 - else
 - echo "Website DOWN";
 
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