首页 / 网页编程 / PHP / 6个超实用的PHP代码片段

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 

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（）; 

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）; 

$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; } 

$filename= "test.jpg"; list（$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）; 

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";