This article introduces to you how to enable and disable the PHP module on Ubuntu. Let’s take a look at the specific content.
All installed PHP module configuration files can be found in the /etc/php/PHP_VERSION/mods-available directory. You can see files with the .ini extension quantity. Specific PHP modules must be installed first, as they need to be enabled before use. The php public package provides the following commands to manage php modules.
phpenmod – used to enable modules in php
phpdismod – used to disable modules in php
phpquery – used to view the status of php modules
There are three types of SAPI (server API) available, the most commonly used ones are CLI, FPM, and Apache2. SAPI can be defined using the -s switch to enable/disable modules only.
Enable PHP modules
Use the phpenmod command followed by module name to enable a specific PHP module on your system. In the example below, the first command is an example and the second command will enable the mbstring module for all installed PHP versions and all SAPIs.
### Syntax $ phpenmod MODULE_NAME ### Enable mbstring php module $ phpenmod mbstring
You can also define a PHP version using the -v switch to enable specific modules. Using this will enable the module for all SAPIs.
### Syntax $ phpenmod -v <PHP VERSION> <MODULE NAME> ### Enable module for specific php version $ phpenmod -v 5.6 mbstring $ phpenmod -v 7.2 mbstring
Use -sswitch to define a SAPI to enable a specific module for a specific SAPI for all PHP versions.
### Syntax $ phpenmod -s <SAPI> <MODULE NAME> ### Enable module for specific SAPI $ phpenmod -s cli mbstring $ phpenmod -s fpm mbstring $ phpenmod -s apache2 mbstring
It is also possible to define the php version and sapi for more specific updates.
Disable PHP modules
Any unnecessary php module can be disabled from the system using the phpdismod command. For example, disable the mbstring module for all PHP versions and all SAPIs.
$ phpdismod mbstring
To disable any module for a specific PHP version, use the command below.
$ phpdismod -v 7.2 mbstring
To disable any module for a specific SAPI on all PHP versions, use the following command.
$ phpdismod -s apache2 mbstring
This article has ended here. For more exciting content, you can pay attention to the PHP Video Tutorial column on the PHP Chinese website!
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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。

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。

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。

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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