PHP文件读取函式,代码如下:
- function PHP_Read($file_name) {
- $fd=fopen($file_name,r);
- while($bufline=fgets($fd, 4096)){
- $buf.=$bufline;
- }
- fclose($fd);
- return $buf;
- }
PHP文件写入函式,代码如下:
- function PHP_Write($file_name,$data,$method=”w”) {
- $filenum=@fopen($file_name,$method);
- flock($filenum,LOCK_EX);
- $file_data=fwrite($filenum,$data);
- fclose($filenum);
- return $file_data;
- }
PHP静态页面生成函式,代码如下:
- function phptohtm($filefrom,$fileto,$u2u=1){
- if($u2u==1){
- $data=PHP_Read($filefrom);
- }else{
- $data=$filefrom;
- }
- PHP_Write($fileto,$data);
- return true;
- }
PHP指定条件信息数量检索函式,代码如下:
- function rec_exist($table,$where){
- $query=”select count(*) as num from $table “.$where;
- $result=mysql_query($query) or die(nerror(1));
- $rowcount=mysql_fetch_array($result);
- $num=$rowcount["num"];
- if ($num==0){
- return false;
- }
- return $num;
- }
PHP目录删除函式,代码如下:
- function del_DIR($directory){
- $mydir=dir($directory);
- while($file=$mydir->read()){
- if((is_dir(“$directory/$file”)) AND ($file!=”.”) AND ($file!=”..”)){
- del_DIR(“$directory/$file”);
- }else{
- if(($file!=”.”) AND ($file!=”..”)){
- unlink(“$directory/$file”);
-
- }
- }
- }
- $mydir->close();
- rmdir($directory);
-
- }
PHP目录名称合法性检测函式,代码如下:
- function isen($str){
- $ret=”";
- for($i=0;$i $p=ord(substr($str,$i,1));
- if(($p<48 & $p!=45 & $p!=46) || ($p>57 & $p<65) || ($p>90 & $p<97 & $p!=95) || $p>122){
- nerror(“不符合规范!”);
- }
- $ret.=chr($p);
- }
- return $ret;
- }
PHP分页函数,代码如下:
-
- function splitlist($HALT,$LRLIST,$ECHOCNT,$paper,$table,$where,$page_id,$userid){
- global $splitstr,$sumcnt;
- if($paper==”" || $sumcnt==”"){
- $query = “select count(*) as num from $table $where”;
- $result = mysql_query($query);
- $row = mysql_fetch_array($result);
- $sumcnt=$row["num"];
- if($sumcnt==0){
- nerror(“该版内还没有选择发布新闻 !”);
- }
- $paper=1;
- }
- $sumpaper=($sumcnt-$sumcnt%$ECHOCNT)/$ECHOCNT;
- if(($sumcnt%$ECHOCNT)!=0) $sumpaper+=1;
- if($sumpaper==1 && $HALT==0) return($where);
- $enwhere=base64_encode(base64_encode($where));
- if(($LRLIST*2+1) < $sumpaper){
- if(($paper-$LRLIST) < 2){
- $tract=1;
- $sub=$LRLIST*2+1;
- }else if(($paper+$LRLIST) >= $sumpaper){
- $tract=$sumpaper-($LRLIST*2);
- $sub=$sumpaper;
- }else{
- $tract=$paper-$LRLIST;
- $sub=$paper+$LRLIST;
- }
- }else{
- $tract=1;
- $sub=$sumpaper;
- }
- $uppaper=$paper-1;
- $downpaper=$paper+1;
- $startcnt=($paper-1)*$ECHOCNT;
- $where.=” limit ${ startcnt },${ ECHOCNT }”;
- if($tract > 1) { $splitstr=”【 << “; }
- else $splitstr=”【 << “;
- for($i=$tract;$i<=$sub;$i++){
- if ($i!=$paper) $splitstr.=”".$i.” “;
- else $splitstr.=”".$i.” “;
- }
- if ($sub!=$sumpaper) $splitstr.=”>> 】”;
- else $splitstr.=”>> 】”;
- return($where);
- }
PHP图片文件上传函式,代码如下:
- function upload_img($UploadFile,$UploadFile_name,$UploadFile_size,$UploadPath,$max_size=64){
-
-
- if(($UploadFile!= “none” )&&($UploadFile != “” )){
- $FileName=$UploadPath.$UploadFile_name;
- if($UploadFile_size <1024){
- $FileSize=”(string)$UploadFile_size” . “字节”;
- }elseif($UploadFile_size <(1024 * $max_size)){
- $FileSize=number_format((double)($UploadFile_size / 1024), 1) . ” KB”;
- }else{
- nerror(“文件超过限制大小!”);
- }
-
-
-
- if(!file_exists($FileName)){
- if(copy($UploadFile,$FileName)){
- return “$UploadFile_name ($FileSize)”;
- }else{
- nerror(“文件 $UploadFile_name 上载失败!”);
- }
- unlink($UploadFile);
- }else{
- nerror(“文件 $UploadFile_name 已经存在!”);
- }
-
- }
- }
以下是一些小技巧.
PHP如何判断ip地址合法性,代码如下:
if(!strcmp(long2ip(sprintf(“%u”,ip2long($ip))),$ip)) echo “is ipn”;
email的正则判断,代码如下:
eregi(“^[_.0-9a-zA-Z-]+@([0-9a-zA-Z][0-9a-zA-Z_-]+.)+[a-zA-Z]$”, $email);
检测ip地址和mask是否合法的例子,代码如下:
- $ip = ’192.168.0.84′;
- $mask = ’255.255.255.0′;
- $network = ’192.168.0′;
- $ip = ip2long($ip);
- $mask = ip2long($mask);
- $network = ip2long($network);
- if( ($ip & $mask) == $network) echo “valid ip and maskn”;
PHP文件下载头部输出如何设定,代码如下:
- header(“Content-type: application/x-download”);
- header(“Content-Disposition: attachment; filename=$file_download_name;”);
- header(“Accept-Ranges: bytes”);
- header(“Content-Length: $download_size”);
- echo ‘xxx’
PHP用header输出ftp下载方式,并且支持断点续传,一个例子:
- header(‘Pragma: public’);
- header(‘Cache-Control: private’);
- header(‘Cache-Control: no-cache, must-revalidate’);
- header(‘Accept-Ranges: bytes’);
- header(‘Connection: close’);
- header(“Content-Type: audio/mpeg”);
- header(“Location:ftp:
PHP正则匹配中文
ereg(“^[".chr(0xa1)."-".chr(0xff)."]+$”, $str);
批量替换文本里面的超级链接
- function urlParse($str = ”){
- if (” == $str) return $str;
- $types = array(“http”, “ftp”, “https”);
- $replace = <<
- ”.htmlentities(’1′).htmlentities(’2′).”
- EOPHP;
- $ret = $str;
- while(list(,$type) = each($types)){
- $ret = preg_replace(“|($type:
- }
- return $ret;
- }
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