Shulou(Shulou.com)06/03 Report--

This article introduces the knowledge of "what code is commonly used in PHP development". In the operation of actual cases, many people will encounter such a dilemma, so let the editor lead you to learn how to deal with these situations. I hope you can read it carefully and be able to achieve something!

First, blacklist filtering

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 _ count; else] = $quote } preg_match_all ("~" .implode ('|, array_keys ($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

Random color generator

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;}

6. Display the user's Gravator avatar with Email

$gravatar_link = 'http://www.gravatar.com/avatar/'. Md5 ($comment_author_email). '? echo 32; 32

'

7. Use cURL to get the number of RSS subscriptions

$ch = curl_init (); curl_setopt ($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)

VIII. Calculation of time difference

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

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