//文件读取函式
function PHP_Read($file_name) {
$fd=fopen($file_name,r);
while($bufline=fgets($fd, 4096)){
$buf.=$bufline;
}
fclose($fd);
return $buf;
}
?>
文件写入函式
//文件写入函式
function PHP_Write($file_name,$data,$method="w") {
$filenum=@fopen($file_name,$method);
flock($filenum,LOCK_EX);
$file_data=fwrite($filenum,$data);
fclose($filenum);
return $file_data;
}
?>
静态页面生成函式
//静态页面生成函式
function phptohtm($filefrom,$fileto,$u2u=1){
if($u2u==1){
$data=PHP_Read($filefrom);
}else{
$data=$filefrom;
}
PHP_Write($fileto,$data);
return true;
}
?>
指定条件信息数量检索函式
//指定条件信息数量检索函式
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 $num;
}
?>
目录删除函式
//目录删除函式
function del_DIR($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");
//echo "unlink $directory/$file ok ";
}
}
}
$mydir->close();
rmdir($directory);
//echo "rmdir $directory ok ";
}
?>
目录名称合法性检测函式
//目录名称合法性检测
function isen($str){
$ret="";
for($i=0;$i $p=ord(substr($str,$i,1));
if(($p57 & $p90 & $p122){
nerror("不符合规范!");
}
$ret.=chr($p);
}
return $ret;
}
?>
分页函式
//分页函式
function splitlist($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(($LRLIST*2+1) if(($paper-$LRLIST) $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=$tract;$iif ($i!=$paper) $splitstr.="".$i." ";
else $splitstr.="".$i." ";
}
if ($sub!=$sumpaper) $splitstr.=">> 】";
else $splitstr.=">> 】";
return($where);
}
?>
关于分页函式的使用说明
/*
#### 检索分页函式 ####
Int $HALT - 检索结果仅分1页时是否(1/0)显示页码条
Int $LRLIST - (页码条显示页码数-1)/2
Int $ECHOCNT - 检索时每页显示记录的数量
Int $paper - 页数,预提取:$paper=$HTTP_GET_VARS[paper];
Varchar $table - 数据表名,预附值:$table="db.table";
Varchar $where - 检索条件,预附值:$where="where field='value'";
Varchar $enwhere - 将原$where进行两次base64_encode()编码后以GET的方式提交
Varchar $splitstr - 页码条输出字串,执行函式后在相应的位置执行 echo $splitstr;
函式调用前需获取变量 -
$paper=$HTTP_GET_VARS[paper];
$sumcnt=$HTTP_GET_VARS[sumcnt];
$enwhere=$HTTP_GET_VARS[enwhere];
Return (Varchar $where) - 分页后检索语句的检索条件
注意:本函式需调用出错处理函式 nerror($error);
*/
图片文件上传函式
//图片文件上传函式
function upload_img($UploadFile,$UploadFile_name,$UploadFile_size,$UploadPath,$max_size=64){
//$TimeLimit=60; //设置超时限制时间 缺省时间为 30秒 设置为0时为不限时
//set_time_limit($TimeLimit);
if(($UploadFile!= "none" )&&($UploadFile != "" )){
$FileName=$UploadPath.$UploadFile_name;
if($UploadFile_size $FileSize="(string)$UploadFile_size" . "字节";
}elseif($UploadFile_size $FileSize=number_format((double)($UploadFile_size / 1024), 1) . " KB";
}else{
nerror("文件超过限制大小!");
}
//{
//$FileSize="number_format((double)($UploadFile_size" / (1024 * 1024)), 1) . " MB";
// }
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 $UploadFile_name 已经存在!");
}
//set_time_limit(30); //恢复缺省超时设置
}
}
以下是一些小技巧:
如何判断ip地址合法性
if(!strcmp(long2ip(sprintf("%u",ip2long($ip))),$ip)) echo "is ipn";
----
email的正则判断
eregi("^[_.0-9a-zA-Z-]+@([0-9a-zA-Z][0-9a-zA-Z_-]+.)+[a-zA-Z]$", $email);
检测ip地址和mask是否合法的例子
$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) == $network) echo "valid ip and maskn";
?>
----
文件下载头部输出如何设定
header("Content-type: application/x-download");
header("Content-Disposition: attachment; filename=$file_download_name;");
header("Accept-Ranges: bytes");
header("Content-Length: $download_size");
echo 'xxx'
用header输出ftp下载方式,并且支持断点续传
一个例子:
header('Pragma: public');
header('Cache-Control: private');
header('Cache-Control: no-cache, must-revalidate');
header('Accept-Ranges: bytes');
header('Connection: close');
header("Content-Type: audio/mpeg");
header("Location:ftp://download:1bk3l4s3k9s2@232.2.22.22/2222/web技术开发知识库/cn_web.rmvb");
正则匹配中文
ereg("^[".chr(0xa1)."-".chr(0xff)."]+$", $str);
批量替换文本里面的超级链接
function urlParse($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://)([^\s]*)|ie ", $replace, $ret);
}
return $ret;
}

TooptimizePHPcodeforreducedmemoryusageandexecutiontime,followthesesteps:1)Usereferencesinsteadofcopyinglargedatastructurestoreducememoryconsumption.2)LeveragePHP'sbuilt-infunctionslikearray_mapforfasterexecution.3)Implementcachingmechanisms,suchasAPC

PHPisusedforsendingemailsduetoitsintegrationwithservermailservicesandexternalSMTPproviders,automatingnotificationsandmarketingcampaigns.1)SetupyourPHPenvironmentwithawebserverandPHP,ensuringthemailfunctionisenabled.2)UseabasicscriptwithPHP'smailfunct

The best way to send emails is to use the PHPMailer library. 1) Using the mail() function is simple but unreliable, which may cause emails to enter spam or cannot be delivered. 2) PHPMailer provides better control and reliability, and supports HTML mail, attachments and SMTP authentication. 3) Make sure SMTP settings are configured correctly and encryption (such as STARTTLS or SSL/TLS) is used to enhance security. 4) For large amounts of emails, consider using a mail queue system to optimize performance.

CustomheadersandadvancedfeaturesinPHPemailenhancefunctionalityandreliability.1)Customheadersaddmetadatafortrackingandcategorization.2)HTMLemailsallowformattingandinteractivity.3)AttachmentscanbesentusinglibrarieslikePHPMailer.4)SMTPauthenticationimpr

Sending mail using PHP and SMTP can be achieved through the PHPMailer library. 1) Install and configure PHPMailer, 2) Set SMTP server details, 3) Define the email content, 4) Send emails and handle errors. Use this method to ensure the reliability and security of emails.

ThebestapproachforsendingemailsinPHPisusingthePHPMailerlibraryduetoitsreliability,featurerichness,andeaseofuse.PHPMailersupportsSMTP,providesdetailederrorhandling,allowssendingHTMLandplaintextemails,supportsattachments,andenhancessecurity.Foroptimalu

The reason for using Dependency Injection (DI) is that it promotes loose coupling, testability, and maintainability of the code. 1) Use constructor to inject dependencies, 2) Avoid using service locators, 3) Use dependency injection containers to manage dependencies, 4) Improve testability through injecting dependencies, 5) Avoid over-injection dependencies, 6) Consider the impact of DI on performance.

PHPperformancetuningiscrucialbecauseitenhancesspeedandefficiency,whicharevitalforwebapplications.1)CachingwithAPCureducesdatabaseloadandimprovesresponsetimes.2)Optimizingdatabasequeriesbyselectingnecessarycolumnsandusingindexingspeedsupdataretrieval.


Hot AI Tools

Undresser.AI Undress
AI-powered app for creating realistic nude photos

AI Clothes Remover
Online AI tool for removing clothes from photos.

Undress AI Tool
Undress images for free

Clothoff.io
AI clothes remover

Video Face Swap
Swap faces in any video effortlessly with our completely free AI face swap tool!

Hot Article

Hot Tools

Atom editor mac version download
The most popular open source editor

SublimeText3 Linux new version
SublimeText3 Linux latest version

mPDF
mPDF is a PHP library that can generate PDF files from UTF-8 encoded HTML. The original author, Ian Back, wrote mPDF to output PDF files "on the fly" from his website and handle different languages. It is slower than original scripts like HTML2FPDF and produces larger files when using Unicode fonts, but supports CSS styles etc. and has a lot of enhancements. Supports almost all languages, including RTL (Arabic and Hebrew) and CJK (Chinese, Japanese and Korean). Supports nested block-level elements (such as P, DIV),

MinGW - Minimalist GNU for Windows
This project is in the process of being migrated to osdn.net/projects/mingw, you can continue to follow us there. MinGW: A native Windows port of the GNU Compiler Collection (GCC), freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All MinGW software can run on 64-bit Windows platforms.

SublimeText3 English version
Recommended: Win version, supports code prompts!
