10 PHP code samples worth adding to the favorites (blacklist \ download files)

We often use some functions in Development. the following section describes some of the php Classic code we have encountered in application development. let's take a look at it. i. blacklist Filtering. the code is as follows: functionis_spam ($ text, nbs... we often use some functions in Development. the following section describes some of the php Classic code we have encountered in application development. let's take a look at it.

I. blacklist filtering,The code is as follows:

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

II. random color generator,The code is as follows:

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();

3. download files from the internet,The code is as follows:

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);

IV. Alexa/Google Page Rank,The code is as follows:

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');

5. Force File DownloadThe code is as follows:

$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. use Email to display users' Gravator portraits

$gravatar_link = 'http://www.gravatar.com/avatar/' . md5($comment_author_email) . '?s=32'; echo '';

7. use cURL to obtain the number of RSS subscriptions,The code is as follows:

$ch = curl_init(); curl_setopt($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. time difference calculation,The code is as follows:

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' "; }

9. intercept images,The code is as follows:

$filename= "test.jpg"; list($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);

10. check whether the website is down,The code is as follows:

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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