We may have encountered php files in normal times, but many users don’t know what a php file is? They don’t know how to open a php file? In order to satisfy the curiosity of some users, the editor will now explain the php file to you. And how to open php files.
1. What is a PHP file?
PHP (Hypertext Preprocessor) hypertext preprocessor is a scripting language that is executed on the server side and embedded in HTML documents. , the language style is similar to C language, it is widely used in Internet development, and it is easier to learn!
PHP syntax is a mixture of C, java, Perl and PHP's own syntax. (You can see the comparison between PHP and Java) The execution efficiency of PHP is extremely high; PHP can also execute compiled code. Compilation can achieve encryption and optimize code running, making the code run faster. PHP is extremely powerful and can be compatible with all databases. Programs can also be expanded using C and C++! Currently, many excellent products on the Internet are masterpieces of PHP, including Facebook, Sina, Yahoo, Sohu, MSN, etc., and the world's top 500 companies. 394 of them use PHP technology. According to statistics, more than 70% of the world's traffic comes from the PHP language!
2. How to open a PHP file?
If you just want to open and view the source code, the easiest way is to use Notepad. Notepad++, phpedit, UltraEdit, Dreamwere, VIM editor, etc. can all be opened.
First find a PHP file, as shown in the figure below.
1) Open with Notepad
①Right-click the php file and select "Open (o)" in the pop-up list, as shown below shown.
②Select "Notepad" in the opening method option.
③Then you can see the php code in Notepad, as shown in the picture below.
2) Use Notepad++ to open
①Click the php file and select "Notepad++" in the list that appears, as shown in the figure below.
② Then you can see the php code opened in Notepad++ as shown below. You can see that the php code displays different colors at this time. This is the highlight that comes with Notepad++. .
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Since swoole was introduced earlier, let’s borrow swoole The server/client and multi-process mechanism of the server/client explain the lock. This article mainly introduces the use examples of PHP file lock and process lock...PHP files can also be executed every few seconds Once
Maybe we didn’t know why the server took a long time to respond, but through the comparison of the two examples in the article, we will know how to implement the PHP file to be executed every few seconds, so Also found a solution...The above is the detailed content of PHP file details. 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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