What is the code commonly used in PHP development?

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