


In PHP, there are functions such as urlencode(), urldecode(), rawurlencode(), and rawurldecode() to solve the problem of web page URL encoding and decoding.
Understanding urlencode:
urlencode: refers to an encoding conversion method for Chinese characters in web page URLs. The most common one is that when Chinese queries are entered in search engines such as Baidu and Google, an encoded web page URL is generated. There are generally two ways of urlencoding: one is the traditional GB2312-based Encode (used by Baidu, Yisou, etc.), and the other is utf-8-based Encode (used by Google, Yahoo, etc.). This article analyzes the two methods of Encode and Decode respectively.
Chinese -> Encode of GB2312 -> %D6%D0%CE%C4
Chinese -> Encode of utf-8 -> %E4%B8%AD%E6%96%87
urlencode in Html:
In the html file encoded as GB2312:
http://www.phpernote.com/中文.rar -> The browser automatically converts to -> http://www.phpernote.com/%D6%D0%CE%C4.rar
Note: Firefox does not have good support for Chinese URLs in GB2312 Encode because it sends URLs in utf-8 encoding by default, but the ftp:// protocol is fine. This should be considered a bug in Firefox.
In html file encoded as utf-8:
http://www.phpernote.com/中文.rar -> The browser automatically converts to -> http://www.phpernote.com/%E4%B8%AD%E6%96%87.rar
urlencode in PHP:
//GB2312的Encode echo urlencode("中文-_. ")."\n"; //%D6%D0%CE%C4-_.+ echo urldecode("%D6%D0%CE%C4-_. ")."\n"; //中文-_. echo rawurlencode("中文-_. ")."\n"; //%D6%D0%CE%C4-_.%20 echo rawurldecode("%D6%D0%CE%C4-_. ")."\n"; //中文-_.
All non-alphanumeric characters except -_. will be replaced with a percent sign (%) followed by two hexadecimal digits.
The difference between urlencode and rawurlencode:
urlencode encodes spaces as plus signs (+)
rawurlencode encodes spaces as plus signs (%20)
My last version of the txt file splitter (online) code used urlencode. I have never found this problem. As a result, a serious bug occurred today. All URLs with spaces cannot be solved Analyzed, resulting in the split file being unable to be downloaded. Using the rawurlencode() function solves this problem.
If you want to use utf-8 Encode, there are two methods:
1. Save the file as a utf-8 file, just use urlencode or rawurlencode directly.
2. Use the mb_convert_encoding function.
$url = 'http://www.phpernote.com/中文.rar'; echo urlencode(mb_convert_encoding($url, 'utf-8', 'gb2312'))."\n"; echo rawurlencode(mb_convert_encoding($url, 'utf-8', 'gb2312'))."\n"; //http%3A%2F%2Fwww.huikaiche.com%2F%E4%B8%AD%E6%96%87.rar
Application examples:
function parseurl($url=""){ $url = rawurlencode(mb_convert_encoding($url, 'gb2312', 'utf-8')); $a = array("%3A", "%2F", "%40"); $b = array(":", "/", "@"); $url = str_replace($a, $b, $url); return $url; } $url="ftp://yongfu:password@www.huikaiche.com/中文/中文.rar"; echo parseurl($url); //ftp://yongfu:password@www.huikaiche.com/%D6%D0%CE%C4/%D6%D0%CE%C4.rar
Articles you may be interested in
- Comparison and analysis of JavaScript string encoding functions escape, encodeURI, encodeURIComponent
- PHP string replacement function str_replace is faster than preg_replace Quickly
- PHP generates continuous numeric (letter) array function range() analysis, PHP lottery program function
- String Functions in PHP Full summary
- php function to extract the birthday date from the ID number and verify whether it is a minor
- php finds whether a certain value exists in the array (in_array(), array_search(), array_key_exists())
- Use the PHP function memory_get_usage to obtain the current PHP memory consumption to optimize program performance
- Send email SMTP Error Could not connect to SMTP host. Send fail solution

php把负数转为正整数的方法:1、使用abs()函数将负数转为正数,使用intval()函数对正数取整,转为正整数,语法“intval(abs($number))”;2、利用“~”位运算符将负数取反加一,语法“~$number + 1”。

实现方法:1、使用“sleep(延迟秒数)”语句,可延迟执行函数若干秒;2、使用“time_nanosleep(延迟秒数,延迟纳秒数)”语句,可延迟执行函数若干秒和纳秒;3、使用“time_sleep_until(time()+7)”语句。

php除以100保留两位小数的方法:1、利用“/”运算符进行除法运算,语法“数值 / 100”;2、使用“number_format(除法结果, 2)”或“sprintf("%.2f",除法结果)”语句进行四舍五入的处理值,并保留两位小数。

判断方法:1、使用“strtotime("年-月-日")”语句将给定的年月日转换为时间戳格式;2、用“date("z",时间戳)+1”语句计算指定时间戳是一年的第几天。date()返回的天数是从0开始计算的,因此真实天数需要在此基础上加1。

php判断有没有小数点的方法:1、使用“strpos(数字字符串,'.')”语法,如果返回小数点在字符串中第一次出现的位置,则有小数点;2、使用“strrpos(数字字符串,'.')”语句,如果返回小数点在字符串中最后一次出现的位置,则有。

php字符串有下标。在PHP中,下标不仅可以应用于数组和对象,还可应用于字符串,利用字符串的下标和中括号“[]”可以访问指定索引位置的字符,并对该字符进行读写,语法“字符串名[下标值]”;字符串的下标值(索引值)只能是整数类型,起始值为0。

方法:1、用“str_replace(" ","其他字符",$str)”语句,可将nbsp符替换为其他字符;2、用“preg_replace("/(\s|\ \;||\xc2\xa0)/","其他字符",$str)”语句。

查找方法:1、用strpos(),语法“strpos("字符串值","查找子串")+1”;2、用stripos(),语法“strpos("字符串值","查找子串")+1”。因为字符串是从0开始计数的,因此两个函数获取的位置需要进行加1处理。


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

AI Hentai Generator
Generate AI Hentai for free.

Hot Article

Hot Tools

PhpStorm Mac version
The latest (2018.2.1) professional PHP integrated development tool

Safe Exam Browser
Safe Exam Browser is a secure browser environment for taking online exams securely. This software turns any computer into a secure workstation. It controls access to any utility and prevents students from using unauthorized resources.

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

Dreamweaver CS6
Visual web development tools

SublimeText3 Mac version
God-level code editing software (SublimeText3)
