//获取网上的一个文件function getUrlImage($url, $file = '', $maxExe = 0, $safe = false){ $urlExt = explode('.', $url); $fileExt = array('txt','jpg','gif','png'); if(!in_array(end($urlExt), $fileExt, true)) return false; $file = ($file)? $file.$urlExt : basename($url); $file = rand(1,1000).$file; ob_start(); //开启输出缓冲 set_time_limit($maxExe); //开启最大运行时间 readfile($url);//读入一个文件并写入到输出缓冲 $data = ob_get_contents(); ob_end_clean(); file_put_contents($file,$data); if($safe && is_executable($file)){//为安全起见,判定一下文件是否可执行 unlink($file); return false; } return $file;}getUrlImage('http://www.test.com/3675.jpg','newName');//批量生成cookiefunction mySetCookie($data, $name){ if(empty($data) || empty($name))return; $args = func_get_args(); $time = empty($args[2])? time() + 3600 : time() + $args[2]; $path = empty($args[3])? '' : $args[3]; $domain = empty($args[4])? '' : $args[4]; $secure = empty($args[5])? '' : $args[5]; if(is_array($data)){ foreach($data as $key => $val){ $full = "{$name}[$key]"; setcookie($full, $val, $time, $path, $domain, $secure); } }else{ setcookie($name, $data, $time, $path, $domain, $secure); }}$data = array('name' => '李四', 'age' => 15);mySetCookie($data,'userInfo');print_r($_COOKIE);//冒泡排序function arrSort(&$arr, $asc = ''){ $times = count($arr) - 1; for($i = 0; $i < $times; $i++){ for($j = 0; $j < $times - $i; $j++){ if($arr[$j] > $arr[$j + 1]){ $temp = $arr[$j]; $arr[$j] = $arr[$j + 1]; $arr[$j + 1] = $temp; } } } if('' != $asc) $arr = array_reverse($arr, false);//反转数组元素}//选择排序function seleSort(&$arr){ $times = count($arr) - 1; $jMax = count($arr); for($i = 0; $i < $times; $i++){ $min = $arr[$i]; $minId = $i; for($j = $i + 1; $j < $jMax; $j++){ if($min > $arr[$j]){ $min = $arr[$j]; $minId = $j; } } $temp = $arr[$i]; $arr[$i] = $arr[$minId]; $arr[$minId] = $temp; }}//插入排序function inserSort(&$arr){ $times = count($arr); for($i = 1; $i < $times; $i++){ $insert = $arr[$i]; $insertId = $i - 1; while($insertId >= 0 && $insert < $arr[$insertId]){ $arr[$insertId + 1] = $arr[$insertId]; $insertId--; } $arr[$insertId + 1] = $insert; }}//计算两个文件的相对路径。function relative_dir($fileA, $fileB){//A相当于B，所在目录 $aPath = explode('/',dirname($fileA)); $bPath = explode('/',dirname($fileB)); $bLen = count($bPath); $j = 1; for($i = 1; $i < $bLen; $i++){ if(isset($bPath) && isset($aPath)){ if($aPath[$i] == $bPath[$i]){$j++;}//累计相同路径部分 if($aPath[$i] != $bPath[$i]){$path .= '../';}//不同的，则增加退回上级 } } $path .= implode('/',array_slice($aPath, $j)).'/'.basename($fileA); return $path;}$a = 'a/b/c/test/5/8/aaa.php';$b = 'a/b/c/check/1/2/3/4/bbb.php';echo relative_dir($a,$b);//以附件方式实现文件下载：$file = 'e:/个人简历.doc';$file = iconv('utf-8', 'gb2312',$file);if(file_exists($file)){ $fname = basename($file); $fsize = filesize($file); header("Content-type:application/octet-stream");//二进制数据 header("Content-Disposition:attachment;filename={$fname}");//附件形式 header("Accept-ranges:bytes"); header("Accept-length:".$fsize); readfile($file);}else{ exit('flie not found!');}遍历一个目录，及其子目录：function recurDir($pathName){ $result = array(); $temp = array(); if(!is_dir($pathName) || !is_readable($pathName)) return null; $allFiles = scandir($pathName); foreach($allFiles as $fileName){ if(in_array($fileName, array('.','..')))continue; $fullName = $pathName . '/' . $fileName; if(is_dir($fullName)){ $result[$fileName] = recurdir($fullName); }else{ $temp[] = $fileName; } } foreach($temp as $f){ $result[] = $f; } return $result;}$pathName = 'D:\AppServ\www\zbseoag\\';print_r(recurDir($pathName));//从URL中获取文件扩展名： function getExt($url){ $arr = parse_url($url);//把URL解析成数组 $file = basename($arr['path']); $ext = explode('.',$file); return end($ext);}//PHP验证email格式function checkEmail($email){ $pattern = "/([a-z0-9]*[-_/.]?[a-z0-9]+)*@([a-z0-9]*[-_]?[a-z0-9]+)+[/.][a-z]{2,3}([/.][a-z]{2})?/i"; return preg_match($pattern,$email); }//文件上传<script>function addUpload(){ document.getElementById("upfiles").innerHTML += '<li>文件：<input type="file" name="files[]" /></li>';}function resetUpload(){ document.getElementById("upfiles").innerHTML = '<li>文件：<input type="file" name="files[]" /></li>';}</script><form action="" method="post" enctype="multipart/form-data" ><ul id="upfiles"><li>文件：<input type="file" name="files[]" /></li></ul><input type="submit" value="提交" /><input type="button" value="增加上传框" onClick="addUpload()" /><input type="button" value="重设上传框" onClick="resetUpload()" /></form>$files = 'files';//files是$_FILES中的一个元素数组,并所上传文件信息进行了归类$upDir = './upImg/';$fTypes = 'jpg|gif|txt|chm';function upFilse($files, $upDir, $fTypes){ if(isset($_FILES[$files]['name'])){ if(!is_dir($upDir)) mkdir($upDir, 0777, true) or exit('上传目录创建失败！'); $ftypeArr = explode('|',$fTypes); foreach($_FILES[$files]['name'] as $i => $value){ $fType = strtolower(end(explode(".",$_FILES[$files]['name'][$i]))); if(in_array($fType, $ftypeArr)){ $path = $upDir.time().$_FILES[$files]['name'][$i];//指定目录，且包含有文件名 move_uploaded_file($_FILES[$files]['tmp_name'][$i], $path);//移到指定目录 if($_FILES[$files]['error'][$i] == 0){ $file[$_FILES[$files]['name'][$i]] = $path; list($name, $path) = each($file);//each(数组)返回当前由键名与键值所构成的数组；list(变量1, 变量n 【或数组】) = 数字索引的数组,将值赋给变量。 $sql = "INSERT INTO `database`.`table`(name, path) VALUES ('$name', '$path')"; $msg[] = $value.'文件上传成功'; }else $msg[] = $value.'文件上传失败！'; }else $msg[] = $value.'文件格式不正确！'; } return $msg; }}print_r(upFilse($files, $upDir, $fTypes));//求今天是星期几：$time = getdate();//获取当前时间戳中的时间信息$weekday = array('星期天', '星期一', '星期二', '星期三', '星期四', '星期五', '星期六');$wday = $time['wday'];//当前是一个星期中的第几天echo date("今天是：Y年m月d日H:i:s $weekday[$wday]");//求下周一是几月几日：$time = time();//当前时间戳$weekday = date('w');//当天的数字星期switch($weekday){ case 0: $nextMonday = $time+86400;break;//星期天则加一天 case 1: $nextMonday = $time+7*86400;break;//星期一,则加七天 case 2: $nextMonday = $time+6*86400;break; case 3: $nextMonday = $time+5*86400;break; case 4: $nextMonday = $time+4*86400;break; case 5: $nextMonday = $time+3*86400;break; case 6: $nextMonday = $time+2*86400;break;}echo date('Y-m-d',$nextMonday);//逐行读取文件指定行数的内容：function getRowData($file, $row = 0, mark = false){ $fhandle = fopen($file,'rb'); $row = ($row == 0)? filesize($file) : $row; while($row >0 && !feof($fhandle)){ $data[] = (mark)? fgets($fhandle) : fgetss($fhandle); $row--; } fclose($fhandle);}//读取文件指定字符长度function getLetterData($file, $num = 0, mark = false){ $fhandle = fopen($file,'rb'); $row = ($num)? filesize($file) : $num; $data = fread($fhandle, $num); fclose($fhandle);}//删除目录中在数据库中没有记录的图片public function delImg($data, $dir = '.'){ $files = scandir($dir); $delFiles = array_diff($allFiles,$data); foreach($delFiles as $name){ $file = rtrim($dir,'/').'/'.$name; unlink($file); echo $file.'<br/>'; }}Salin selepas log masuk
![[Web front-end] Permulaan pantas Node.js](https://img.php.cn/upload/course/000/000/067/662b5d34ba7c0227.png)
