Home php教程 php手册 PHP常用技巧汇总

PHP常用技巧汇总

Jun 06, 2016 pm 07:33 PM
php share Multiple Commonly used Skill Summary

本文为大家分享了多个php常用技巧,供大家参考,具体内容如下 1、PHP文件读取函式 //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;} 2、文件写入函式 //

本文为大家分享了多个php常用技巧,供大家参考,具体内容如下

1、PHP文件读取函式

//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;
}
?>
Copy after login

2、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;
}
?>
Copy after login

3、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;
}
?>
Copy after login

4、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;
}
?>
Copy after login

5、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 “;
}
?>
Copy after login

6、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,$i,1));
if(($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;
}
&#63;>
Copy after login

7、PHP分页函数

//分页函数
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);
}
&#63;>
Copy after login

PHP关于分页函式的使用说明
8、PHP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 <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!”);
}
//{
//$FileSize=”number_format((double)($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
}
}
Copy after login

以下是一些小技巧:
1、 PHP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”;
&#63;>
—-
Copy after login

2、PHP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'
Copy after login

3、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://download:1bk3l4s3k9s2@232.2.22.22/2222/web技术开发知识库/cn_web.rmvb”);
Copy after login

4、PHP正则匹配中文

ereg(“^[".chr(0xa1)."-".chr(0xff)."]+$”, $str);
Copy after login

5、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;
}
Copy after login

以上就是本文的全部内容,很常用的php技巧送给大家,希望大家喜欢。

下面是为大家分享的专题内容,内容很全面,查看《php常用技巧汇总》

Statement of this Website
The content of this article is voluntarily contributed by netizens, and the copyright belongs to the original author. This site does not assume corresponding legal responsibility. If you find any content suspected of plagiarism or infringement, please contact admin@php.cn

Hot AI Tools

Undresser.AI Undress

Undresser.AI Undress

AI-powered app for creating realistic nude photos

AI Clothes Remover

AI Clothes Remover

Online AI tool for removing clothes from photos.

Undress AI Tool

Undress AI Tool

Undress images for free

Clothoff.io

Clothoff.io

AI clothes remover

AI Hentai Generator

AI Hentai Generator

Generate AI Hentai for free.

Hot Article

R.E.P.O. Energy Crystals Explained and What They Do (Yellow Crystal)
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. Best Graphic Settings
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
R.E.P.O. How to Fix Audio if You Can't Hear Anyone
3 weeks ago By 尊渡假赌尊渡假赌尊渡假赌
WWE 2K25: How To Unlock Everything In MyRise
4 weeks ago By 尊渡假赌尊渡假赌尊渡假赌

Hot Tools

Notepad++7.3.1

Notepad++7.3.1

Easy-to-use and free code editor

SublimeText3 Chinese version

SublimeText3 Chinese version

Chinese version, very easy to use

Zend Studio 13.0.1

Zend Studio 13.0.1

Powerful PHP integrated development environment

Dreamweaver CS6

Dreamweaver CS6

Visual web development tools

SublimeText3 Mac version

SublimeText3 Mac version

God-level code editing software (SublimeText3)

PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian PHP 8.4 Installation and Upgrade guide for Ubuntu and Debian Dec 24, 2024 pm 04:42 PM

PHP 8.4 brings several new features, security improvements, and performance improvements with healthy amounts of feature deprecations and removals. This guide explains how to install PHP 8.4 or upgrade to PHP 8.4 on Ubuntu, Debian, or their derivati

Discuss CakePHP Discuss CakePHP Sep 10, 2024 pm 05:28 PM

CakePHP is an open-source framework for PHP. It is intended to make developing, deploying and maintaining applications much easier. CakePHP is based on a MVC-like architecture that is both powerful and easy to grasp. Models, Views, and Controllers gu

How To Set Up Visual Studio Code (VS Code) for PHP Development How To Set Up Visual Studio Code (VS Code) for PHP Development Dec 20, 2024 am 11:31 AM

Visual Studio Code, also known as VS Code, is a free source code editor — or integrated development environment (IDE) — available for all major operating systems. With a large collection of extensions for many programming languages, VS Code can be c

CakePHP Quick Guide CakePHP Quick Guide Sep 10, 2024 pm 05:27 PM

CakePHP is an open source MVC framework. It makes developing, deploying and maintaining applications much easier. CakePHP has a number of libraries to reduce the overload of most common tasks.

How do you parse and process HTML/XML in PHP? How do you parse and process HTML/XML in PHP? Feb 07, 2025 am 11:57 AM

This tutorial demonstrates how to efficiently process XML documents using PHP. XML (eXtensible Markup Language) is a versatile text-based markup language designed for both human readability and machine parsing. It's commonly used for data storage an

Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Explain JSON Web Tokens (JWT) and their use case in PHP APIs. Apr 05, 2025 am 12:04 AM

JWT is an open standard based on JSON, used to securely transmit information between parties, mainly for identity authentication and information exchange. 1. JWT consists of three parts: Header, Payload and Signature. 2. The working principle of JWT includes three steps: generating JWT, verifying JWT and parsing Payload. 3. When using JWT for authentication in PHP, JWT can be generated and verified, and user role and permission information can be included in advanced usage. 4. Common errors include signature verification failure, token expiration, and payload oversized. Debugging skills include using debugging tools and logging. 5. Performance optimization and best practices include using appropriate signature algorithms, setting validity periods reasonably,

PHP Program to Count Vowels in a String PHP Program to Count Vowels in a String Feb 07, 2025 pm 12:12 PM

A string is a sequence of characters, including letters, numbers, and symbols. This tutorial will learn how to calculate the number of vowels in a given string in PHP using different methods. The vowels in English are a, e, i, o, u, and they can be uppercase or lowercase. What is a vowel? Vowels are alphabetic characters that represent a specific pronunciation. There are five vowels in English, including uppercase and lowercase: a, e, i, o, u Example 1 Input: String = "Tutorialspoint" Output: 6 explain The vowels in the string "Tutorialspoint" are u, o, i, a, o, i. There are 6 yuan in total

7 PHP Functions I Regret I Didn't Know Before 7 PHP Functions I Regret I Didn't Know Before Nov 13, 2024 am 09:42 AM

If you are an experienced PHP developer, you might have the feeling that you’ve been there and done that already.You have developed a significant number of applications, debugged millions of lines of code, and tweaked a bunch of scripts to achieve op

See all articles