php mysql means an architecture. PHP is a back-end development technology that is easy to learn and use. Users only need to have very little programming knowledge to use PHP to build a Web site with interactive functions. , the biggest feature of PHP is its simplicity and natural integration with MySQL.
php mysql means:
php mysql
is a structure.
If you want to use php mysql
architecture to develop, the front desk is generally inseparable from div css
. There are parameter descriptions when purchasing the server. Note that the general space supports php, and mysql is installed or not. Myqsl sometimes needs to purchase the mysql database separately.
1. PHP
is a back-end development technology that is easy to learn and use. Users only need to have very little programming knowledge to use PHP to build a Web site with interactive functions. PHP is also an embedded HTML scripting language. Most of the syntax is derived from the C language, and some PHP features are borrowed from the Java and Perl languages.
2. The biggest feature of PHP is its simplicity and natural integration with MySQL. Judging from the current market situation, there are approximately 22 million websites using PHP technology, and the number is still increasing. PHP technology is also supported by computer industry giants, such as IBM and Oracle, which are committed to developing programs that support PHP software to smoothly read their databases and support the development of PHP.
3. MySQL
is an open source small relational database management system, developed by the Swedish MySQL AB company
4. MySQL is widely used on the Internet of small and medium-sized websites. Due to its small size, fast speed, low total cost of ownership, and especially the characteristics of open source, many small and medium-sized websites choose MySQL as their website database in order to reduce the total cost of website ownership.
5. PHP installation can execute dynamic web pages faster than CGI or Perl. Dynamic pages made with PHP are compared with other programming languages.
6. PHP embeds the program into the HTML document for execution, and the execution efficiency is much higher than CGI that completely generates HTML tags.
7. PHP has very powerful functions, and all CGI functions can be realized by PHP.
8, and supports almost all popular databases and operating systems. The most important thing is that PHP can use C and C to extend the program.
Related learning recommendations: PHP programming from entry to proficiency
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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。

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。


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