First download the PHP installation file. We use the source code to compile and install PHP5.4.36. Go to the PHP official website to download the PHP installation file.
Next, compile and install the PHP source code. After entering the source code directory, execute the following command to install:
Note: If you need mysql, it is best to do it during mutation Provide parameters and specify to use the mysqlnd library, otherwise the installation of separately compiled extensions can only use the MySQL Client Library.
The following error appears:
It prompts that libxml2 cannot be found, install it:
Continue to recompile, the following error appears:
Because we have enabled --with-openssl , therefore, we need to install openssl-devel:
Compile again, prompt:
GD library is not installed:
Continue compiling, prompt:
Not installed libmcrypt, this lib is not available in yum, so you need to download it and compile it manually:
Compile again:
Need Install libcurl:
Compile again, no errors:
configure is successful, start the installation:
If everything goes well, the beautiful artistic conception successfully compiles and installs PHP, installation directory In /usr/local/php.
Finally, we need to provide the PHP configuration file php.ini.
Note: The PHP installation directory is specified by the --prefix=directory parameter of configure . In addition, what we have built here is an environment for development. If it needs to be used as a production environment, you need to pay attention to some security issues. At the same time, it is recommended not to copy php.ini-development file, instead copy the php.ini-production file.
Check the PHP version:
For ease of operation, you can add the PHP directory to the environment variable. Edit ~/.bash_profile, in export PATH Add the following line above:
Then execute the following command:
In this way, we can use the command directly without adding a directory.
Tip: Check which configuration file PHP is using?
If the strace command is not installed, use yum install strace Just install it.
Install extension
Now that the basic PHP installation is complete, we need to install some extensions that meet business needs.
Install the yaf development framework extension
Execute the command to install using pecl:
If nothing else, the above command is enough to complete the installation of yaf:
Next, you need to install it in php. Enable yaf extension in ini file. Edit /usr/local/php/etc/php.ini
Install eAccelerator extension
in php Add eAccelerator configuration information in .ini:
Execute php -v You can see:
The above introduces the LNMP environment construction (1) Setting up the PHP environment, including aspects of the 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。

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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