PHP, "Hypertext Preprocessor", is a general open source scripting language. PHP is a scripting language executed on the server side. It is similar to C language and is a commonly used website programming language. PHP's unique syntax mixes C, Java, Perl, and PHP's own syntax. It is conducive to learning and widely used. It is mainly suitable for the field of web development.
Learn what PHP can do
1. PC website development
60% of global Internet websites use PHP technology, and 80% of domestic Internet websites are developed using PHP. So many websites include shopping websites, government and corporate websites, QQ space, forum blogs, etc.
2. Mobile microsite development
The popularity of mobile devices has laid the foundation for the rapid development of the mobile Internet! Mobile Taobao website, mobile JD website, etc., microsites in WeChat public account applications. In the future, microsites and public accounts will definitely replace the status of APP!
3. APP background development
APP background development is also a product of the development of the mobile Internet. In order to provide users with a better experience on mobile phones, most websites have joined the ranks of developing APPs. And PHP back-end technology will be their best choice.
PHP scripts are mainly used in the following three areas:
Server-side scripts.
This is the most traditional and main target area of PHP. Three things are required to carry out this work: PHP parser (CGI or server module), web server and web browser. You need to install and configure PHP when running the web server. Then, you can use a web browser to access the output of the PHP program, that is, browse the PHP page on the server. If you're just experimenting with PHP programming, all of this can be run on your home computer. Please consult the Installation chapter for more information.
Command line script.
You can write a PHP script and don't need any server or browser to run it. This way, only the PHP parser is needed to execute. This usage is ideal for daily running scripts that rely on cron (Unix or Linux environment) or Task Scheduler (Windows environment). These scripts can also be used to process simple text. See PHP's command line mode for more information.
Write desktop applications.
For desktop applications with graphical interfaces, PHP may not be the best language, but if the user is very proficient in PHP and wants to use some advanced aspects of PHP in client applications Features, you can use PHP-GTK to write these programs. In this way, you can also write cross-platform applications. PHP-GTK is an extension of PHP that is not included in the commonly distributed PHP packages. If you are interested in PHP-GTK, please visit its website for more information.
Well-known websites such as Facebook, Youbute, Sina, Baidu, Taobao, Sohu and Tencent all have a large part of their business developed using PHP
The above is the detailed content of What kind of work can you do if you learn PHP?. For more information, please follow other related articles on the PHP Chinese website!

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。

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。

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。

在PHP中,可以利用implode()函数的第一个参数来设置没有分隔符,该函数的第一个参数用于规定数组元素之间放置的内容,默认是空字符串,也可将第一个参数设置为空,语法为“implode(数组)”或者“implode("",数组)”。


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