闲者博客 - 代码片段

PHP循环判断关键词是否存在,如果存在就跳过

2022-03-06T00:09:15+08:00

1.设置关键词数组,也可以利用mysql调用得到$keyword_arr=['关键词1','关键词2','关键词3']2.建立个子程序方便调用function checKeyword($str='',$keyword_arr=[]){ foreach ($keyword_arr as $keyword) { if (strstr($str, $keyword) != FALSE)return true; //如果不需要区别大小写可以这么写 // if (strstr(strtolower($str), strtolower($keyword)) != FALSE)return true; } return false; }3.调用方式演示 $strtolowerbt="这里为内容查询这段是否有关键词包含"; if(checKeyword($strtolowerbt,$keyword_arr)) { continue; }

php边压缩边下载

2022-03-05T02:12:00+08:00

php实现边压缩边下载，原理大概就是，每压缩一个文件就输出给浏览器。实现压缩与下载同步进行。1.关键代码如下setDoWrite(); $data1; define('BASE_PATH',str_replace('\\','/',realpath(dirname(__FILE__).'/'))."/");//去当前执行文件绝对路径 //define('WWWROOT',$_SERVER['DOCUMENT_ROOT']."/");//网站根目录,如果需要用这个直接屏蔽上面一行代码用这个变量把下面BASE_PATH替换成WWWROOT即可 $lj=BASE_PATH."bbb";//设置需要打包的目录,方便下面替换避免压缩包把整个路径的文件夹创建 $filearr1 = list_file($lj);//所有待压缩的文件数组，一般只存路径即可 $filearr=toOneArray($filearr1);//多维数组改为一维数组 foreach ($filearr as $key => $value) { try{ //此处可以添加用户连接判断，若是用户取消了下载或断开了链接就终止操作 $url = $value; $file= file_get_contents($url);//获取文件内容，用file_get_content即可，这个是我自己封装的 $value=str_replace($lj."/", "", $value);//替换路径避免压缩包多余路径文件夹 $zip->addFile($file,iconv("utf-8","gbk",$value));//调用类的addFile开始压缩 ob_flush();//输出本次压缩的文件 }catch(Exception $e){ log($e); } } //输出zip文件尾部 $zip->file(); flush();//结束上传，缺少可能会引起压缩文件打不开 function list_file($date){ //1、首先先读取文件夹 $temp=scandir($date); //遍历文件夹 foreach($temp as $v){ $a=$date.'/'.$v; if($v=='.' || $v=='..'){//判断是否为系统隐藏的文件.和.. 如果是则跳过否则就继续往下走，防止无限循环再这里。 continue; } if(is_dir($a)){//如果是文件夹则执行 $data1[] = list_file($a);//因为是文件夹所以再次调用自己这个函数，把这个文件夹下的文件遍历出来 }else{ $data1[]=["imgpath"=>$a]; //加入到数组里准备返回(特别上面那个他是调用自身那么他也会返回多维数组出来) } } return $data1; } function toOneArray($array) { static $res_arr = []; foreach ($array as $v) { if (is_array($v)) { toOneArray($v); } else { $res_arr[] = $v; } } return $res_arr; } ?>2.引入压缩文件类zip.class.php，是phpMyadmin的压缩方法 file * * @var boolean $doWrite */ var $doWrite = false; /** * Array to store compressed data * * @var array $datasec */ var $datasec = array(); /** * Central directory * * @var array $ctrl_dir */ var $ctrl_dir = array(); /** * End of central directory record * * @var string $eof_ctrl_dir */ var $eof_ctrl_dir = "\x50\x4b\x05\x06\x00\x00\x00\x00"; /** * Last offset position * * @var integer $old_offset */ var $old_offset = 0; /** * Sets member variable this -> doWrite to true * - Should be called immediately after class instantiantion * - If set to true, then ZIP archive are echo'ed to STDOUT as each * file is added via this -> addfile(), and central directories are * echoed to STDOUT on final call to this -> file(). Also, * this -> file() returns an empty string so it is safe to issue a * "echo $zipfile;" command * * @access public * * @return void */ function setDoWrite() { $this -> doWrite = true; } // end of the 'setDoWrite()' method /** * Converts an Unix timestamp to a four byte DOS date and time format (date * in high two bytes, time in low two bytes allowing magnitude comparison). * * @param integer $unixtime the current Unix timestamp * * @return integer the current date in a four byte DOS format * * @access private */ function unix2DosTime($unixtime = 0) { $timearray = ($unixtime == 0) ? getdate() : getdate($unixtime); if ($timearray['year'] < 1980) { $timearray['year'] = 1980; $timearray['mon'] = 1; $timearray['mday'] = 1; $timearray['hours'] = 0; $timearray['minutes'] = 0; $timearray['seconds'] = 0; } // end if return (($timearray['year'] - 1980) << 25) | ($timearray['mon'] << 21) | ($timearray['mday'] << 16) | ($timearray['hours'] << 11) | ($timearray['minutes'] << 5) | ($timearray['seconds'] >> 1); } // end of the 'unix2DosTime()' method /** * Adds "file" to archive * * @param string $data file contents * @param string $name name of the file in the archive (may contains the path) * @param integer $time the current timestamp * * @access public * * @return void */ function addFile($data, $name, $time = 0) { $name = str_replace('\\', '/', $name); $dtime = substr("00000000" . dechex($this->unix2DosTime($time)), -8); $hexdtime = '\x' . $dtime[6] . $dtime[7] . '\x' . $dtime[4] . $dtime[5] . '\x' . $dtime[2] . $dtime[3] . '\x' . $dtime[0] . $dtime[1]; eval('$hexdtime = "' . $hexdtime . '";'); $fr = "\x50\x4b\x03\x04"; $fr .= "\x14\x00"; // ver needed to extract $fr .= "\x00\x00"; // gen purpose bit flag $fr .= "\x08\x00"; // compression method $fr .= $hexdtime; // last mod time and date // "local file header" segment $unc_len = strlen($data); $crc = crc32($data); $zdata = gzcompress($data); $zdata = substr(substr($zdata, 0, strlen($zdata) - 4), 2); // fix crc bug $c_len = strlen($zdata); $fr .= pack('V', $crc); // crc32 $fr .= pack('V', $c_len); // compressed filesize $fr .= pack('V', $unc_len); // uncompressed filesize $fr .= pack('v', strlen($name)); // length of filename $fr .= pack('v', 0); // extra field length $fr .= $name; // "file data" segment $fr .= $zdata; // echo this entry on the fly, ... if ( $this -> doWrite) { echo $fr; } else { // ... OR add this entry to array $this -> datasec[] = $fr; } // now add to central directory record $cdrec = "\x50\x4b\x01\x02"; $cdrec .= "\x00\x00"; // version made by $cdrec .= "\x14\x00"; // version needed to extract $cdrec .= "\x00\x00"; // gen purpose bit flag $cdrec .= "\x08\x00"; // compression method $cdrec .= $hexdtime; // last mod time & date $cdrec .= pack('V', $crc); // crc32 $cdrec .= pack('V', $c_len); // compressed filesize $cdrec .= pack('V', $unc_len); // uncompressed filesize $cdrec .= pack('v', strlen($name)); // length of filename $cdrec .= pack('v', 0); // extra field length $cdrec .= pack('v', 0); // file comment length $cdrec .= pack('v', 0); // disk number start $cdrec .= pack('v', 0); // internal file attributes $cdrec .= pack('V', 32); // external file attributes // - 'archive' bit set $cdrec .= pack('V', $this -> old_offset); // relative offset of local header $this -> old_offset += strlen($fr); $cdrec .= $name; // optional extra field, file comment goes here // save to central directory $this -> ctrl_dir[] = $cdrec; } // end of the 'addFile()' method /** * Echo central dir if ->doWrite==true, else build string to return * * @return string if ->doWrite {empty string} else the ZIP file contents * * @access public */ function file() { $ctrldir = implode('', $this -> ctrl_dir); $header = $ctrldir . $this -> eof_ctrl_dir . pack('v', sizeof($this -> ctrl_dir)) . //total #of entries "on this disk" pack('v', sizeof($this -> ctrl_dir)) . //total #of entries overall pack('V', strlen($ctrldir)) . //size of central dir pack('V', $this -> old_offset) . //offset to start of central dir "\x00\x00"; //.zip file comment length if ( $this -> doWrite ) { // Send central directory & end ctrl dir to STDOUT echo $header; return ""; // Return empty string } else { // Return entire ZIP archive as string $data = implode('', $this -> datasec); return $data . $header; } } // end of the 'file()' method } // end of the 'ZipFile' class ?>

一段JS读取内容这样前台静态加载到页面

2022-02-26T17:40:48+08:00

PHP循环遇到关键词就跳过分享

2022-02-26T17:36:47+08:00

$keyword_arr=['词1','词2','词3']; //也可以上面数据库存入 function checKeyword($str='',$keyword_arr=[]){ foreach ($keyword_arr as $keyword) { //var_dump($keyword); if (strstr($str, $keyword) != FALSE)return true; } return false; } while($r = mysql_fetch_array($query)){ $bt=$r['ybt'];//标题 $strtolowerbt=strtolower($bt); if(checKeyword($strtolowerbt,$keyword_arr)) { continue; } }

php 冷门api goto

2022-02-26T10:14:07+08:00

"; goto TEST; echo "

"; TEST: echo "end"; //goto 不能跳入循环 switch。。。case 函数和类都不可以 //但是可以跳出循环

php 判断是否是https或者http 直接获取域名

2022-02-26T10:11:19+08:00

//主动判断是否HTTPS function isHTTPS() { if (defined('HTTPS') && HTTPS) return true; if (!isset($_SERVER)) return FALSE; if (!isset($_SERVER['HTTPS'])) return FALSE; if ($_SERVER['HTTPS'] === 1) { //Apache return TRUE; } elseif ($_SERVER['HTTPS'] === 'on') { //IIS return TRUE; } elseif ($_SERVER['SERVER_PORT'] == 443) { //其他 return TRUE; } return FALSE; }$codepay_config['host'] = (isHTTPS() ? 'https://' : 'http://') . $_SERVER['HTTP_HOST']; //获取域名

PHP压缩和解压代码段

2022-02-25T18:59:25+08:00

[scode type="green"]PHP文件 Zip 压缩[/scode]open($destination,$overwrite ? ZIPARCHIVE::OVERWRITE : ZIPARCHIVE::CREATE) !== true) { return false; } //add the files foreach ($valid_files as $file) { $zip->addFile($file,$file); } //debug //echo 'The zip archive contains ',$zip->numFiles,' files with a status of ',$zip->status; //close the zip -- done! $zip->close(); //check to make sure the file exists return file_exists($destination); } else { return false; } } /***** Example Usage ***/ $files = array('file1.jpg', 'file2.jpg', 'file3.gif'); create_zip($files, 'myzipfile.zip', true); ?>[scode type="green"]PHP解压缩 Zip文件[/scode]open($file) !== TRUE) { die ('Could not open archive'); } // extract contents to destination directory $zip->extractTo($destination); // close archive $zip->close(); echo 'Archive extracted to directory'; } ?>

PHP寻找两个字符串的相似性

2022-02-25T18:57:11+08:00

[scode type="blue"]PHP 提供了一个极少使用的 similar_text 函数，但此函数非常有用，用于比较两个字符串并返回相似程度的百分比。[/scode]

PHP强制性文件下载

2022-02-25T18:54:59+08:00

PHP截取字符串长度

2022-02-25T18:52:51+08:00

/* Utf-8、gb2312都支持的汉字截取函数 cut_str(字符串, 截取长度, 开始长度, 编码); 编码默认为 utf-8 开始长度默认为 0 */ function cutStr($string, $sublen, $start = 0, $code = 'UTF-8'){ if($code == 'UTF-8'){ $pa = "/[x01-x7f]|[xc2-xdf][x80-xbf]|xe0[xa0-xbf][x80-xbf]|[xe1-xef][x80-xbf][x80-xbf]|xf0[x90-xbf][x80-xbf][x80-xbf]|[xf1-xf7][x80-xbf][x80-xbf][x80-xbf]/"; preg_match_all($pa, $string, $t_string); if(count($t_string[0]) - $start > $sublen) return join('', array_slice($t_string[0], $start, $sublen))."..."; return join('', array_slice($t_string[0], $start, $sublen)); }else{ $start = $start*2; $sublen = $sublen*2; $strlen = strlen($string); $tmpstr = ''; for($i=0; $i<$strlen; $i++){ if($i>=$start && $i<($start+$sublen)){ if(ord(substr($string, $i, 1))>129){ $tmpstr.= substr($string, $i, 2); }else{ $tmpstr.= substr($string, $i, 1); } } if(ord(substr($string, $i, 1))>129) $i++; } if(strlen($tmpstr)<$strlen ) $tmpstr.= "..."; return $tmpstr; } } $str = "jQuery插件实现的加载图片和页面效果"; echo cutStr($str,16);