## Install composer through composer
## This is installed with Composer (Recommended learning: yii tutorial )
If Composer has not been installed, you can install it according to the method in getcomposer.org.In Linux and Mac OS X you can run the following command:
curl -sS https://getcomposer.org/installer | php mv composer.phar /usr/local/bin/composerIn Windows, you need to download and run Composer-Setup.exe. If you encounter any questions or want to learn more about Composer. If you have Composer installed, make sure you are using the latest version. You can use the composer self-update command to update Composer to the latest version. All composer commands assume that you have installed composer globally so that it can be used as a composer command. If you are using composer.phar in a local directory, you must adjust the example commands accordingly. If you have installed Composer before, make sure to use the latest version. You can update Composer by running composer self-update.
Installing Yii
After installing Composer, you can install the Yii application template by running the following command under a web-accessible folder:
composer create-project --prefer-dist yiisoft/yii2-app-basic basicThis will install the latest stable version of the Yii application template in a directory called basic. You can choose a different directory name if needed.
Tips: If you want to install the latest development version of Yii, you can use the following command instead, which adds a stability option
composer create-project --prefer-dist --stability=dev yiisoft/yii2-app-basic basicPlease note that the development version of Yii Should not be used in production as it may break your running code.
The above is the detailed content of How to install yii framework. 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。

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。

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。

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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