


I will be learning PHP full-stack development in the near future, and will write a series of articles to summarize the learning process to encourage myself.
The first article records the installation of the LAMP environment
0. Install the Apache Web server
Update the system before installation
sudo apt-<span>get</span> update && sudo apt-<span>get</span> dist-upgrade
Then install Apache
sudo apt-<span>get</span> install apache2
At this time, enter localhost in the browser You can see "It works!", indicating that the installation is successful.
1. Install the MySQL database
sudo apt-<span>get</span> install mysql-server php5-mysql
Then there are some security settings, including root password, remote login, etc.
sudo mysql_secure_installation
Choose Y/n according to your needs, it’s OK.
2. Install PHP
Install php5 and some useful extensions (php5-curl, php5-imagick, etc.):
sudo apt-<span>get</span> install php5 libapache2-mod-php5 php5-mcrypt php5-curl php5-imagick php5-cli
Modify Apache’s dir.cof file to let Apache search first index.php:
<ifmodule mod_dir.c><span> DirectoryIndex index.php index.html index.cgi index.pl index.xhtml index.htm </span></ifmodule>
Then restart the Apache web server:
sudo service apache2 restart
3. Modify the root directory of the website
You need to modify two configuration files
1) Modify /etc/apache2/apache2. conf, find <code><directory></directory>
, replace <code>/var/www/
with your own directory
2) Modify <code>/etc/apache2/sites-available/000- default.conf
, find DocumentRoot /var/www/html
, replace <code>/var/www/html with your own directory
and then restart Apache
sudo service apache2 restart
3) Copy the "index.html" file Go to your root directory
cp /<span>var</span>/www/html/index.html /自己的根目录
4. Summary
At this point, the LAMP environment is installed, and you can develop your own website in the future.
Reference links:
[1] ZH cheese: Ubuntu 14.04 installs LAMP (Linux, Apache, MySQL, PHP)
[2] Ubuntu 14.04 installs Apache
The above introduces the first part of the PHP learning record: the installation of LAMP under Ubuntu1404, including the relevant content. I hope it will be helpful to friends who are interested in PHP tutorials.

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。

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。

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)”。

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。


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