php is generally used for web website development. Many small websites are developed with PHP. With development, PHP can do more and more, such as WeChat applets, public accounts, app interfaces, etc.; in addition , PHP scripts can also be used to write desktop applications.
Xiao Ming wants to learn programming. I heard others say that PHP is a popular programming language now. I really want to learn about it, but I don’t know what PHP is used for. . I think Xiao Ming is not the only one who has such doubts. I will write an article to talk to you about what PHP is used for.
PHP is a general-purpose open source scripting language. The syntax absorbs the characteristics of C language, Java and Perl, which is easy to learn and widely used. It is mainly suitable for the field of Web development.
Actually PHP can do anything. PHP is mainly used for server-side scripts, so you can use PHP to complete any work that other CGI programs can do, such as collecting form data, generating dynamic web pages, or sending/receiving Cookies. But PHP’s capabilities go far beyond that.
PHP is mainly used for website development. Many small websites are developed with PHP. With development, PHP can do more and more, such as WeChat applets, public accounts, app interfaces, etc. Now it is Swoole's growing power is used in the Internet of Things, live broadcast platforms, and human intelligence.
PHP is a very excellent scripting language, concise and efficient. Now more and more people use it to develop dynamic websites. It can be said that PHP has become one of the best website development languages. Especially for those website developers who need to be able to develop small and medium-sized commercial applications quickly and efficiently, PHP is their preferred language.
PHP scripts are mainly used in the following three areas:
1. Server-side scripts. This is the most traditional and main target area of PHP. Three things are required to do this: a PHP parser (CGI or server module), a web server, and a 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.
2. 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 environments) or Task Scheduler (Windows environments). These scripts can also be used to process simple text. See PHP's command line mode for more information.
3. 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 features of PHP in client applications, they 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.
Related tutorials: PHP video tutorial
The above is the detailed content of What is php generally used for?. 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。

在php中,可以使用substr()函数来读取字符串后几个字符,只需要将该函数的第二个参数设置为负值,第三个参数省略即可;语法为“substr(字符串,-n)”,表示读取从字符串结尾处向前数第n个字符开始,直到字符串结尾的全部字符。

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。


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