一、黑名单过滤
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 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 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以上内容针对php开发中常用的十个代码样例做了总结，希望对大家有所帮助。
以上就介绍了php开发中常用的十个代码样例，包括了方面的内容，希望对php教程有兴趣的朋友有所帮助。