In php, today we will introduce the characteristics of 3 types of php and the advantages of 6 types of php. Friends in need can refer to it.
Features of PHP
1. Supports almost all popular databases and operating systems
2.Yes Use C and C to expand the program!
3. Easy to maintain and simple to learn.
Advantages of PHP
1. Open source code: All PHP source code is actually available.
2. Free: Compared with other technologies, PHP itself is free and open source.
3. Fast: Program development is fast, running is fast, and the technology itself is learned quickly. Embedded in HTML: Because PHP can be embedded in the HTML language, it is comparable to other languages. Editing is simple, practical, and more suitable for beginners.
4. Strong cross-platform: Since PHP is a script that runs on the server side, it can run on UNIX, LINUX, WINDOWS, Mac OS and other platforms
5. High efficiency PHP consumes very little system resource.
6. Image processing: Use PHP to dynamically create images. PHP image processing uses GD2 by default. And can also be configured to use image magick for image processing.
Now more and more new companies or new projects use PHP, which makes PHP-related communities more and more active, which in turn affects the choices of many projects or companies, forming a virtuous cycle. As far as we know so far, PHP is the first choice for most domestic web projects, and many companies have switched to PHP from other languages (such as ASP).
Currently, more than 60% of the world's 50 million Internet websites use PHP technology. 394 of the Alexa TOP500 Chinese websites use PHP. More than 80% of domestic dynamic websites use PHP for development. Among Web back-end languages PHP's global language market share has reached 80%, but the current PHP talent supply and demand ratio is only 1:14, and there is still a large talent gap.
On the one hand, there is an extreme shortage of PHP programmers. On the other hand, with the continuous development of China's "Internet", not only first-tier cities such as Beijing, Shanghai, and Shenzhen have strong demand for PHP programmers, but also some second-tier cities such as Provincial capital cities such as Tianjin, Hangzhou, Chengdu, Changsha, Chongqing, and Wuhan also have strong demand for PHP programmers, and the salary is also quite competitive. It is far easier to find high-paying jobs than other IT languages. If you are afraid of the work pressure in first-tier cities and want to learn a skill and want to return to your hometown capital city for a high-paying job, then it is strongly recommended that you choose to learn PHP!
Recommended learning: php video tutorial
The above is the detailed content of What are the features of php? There are 6 advantages of 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。

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。

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。

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。


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