6个超实用的PHP代码片段_PHP教程

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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

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									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();

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									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);

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									$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; 

									}

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									$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);

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									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";