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MySQL add, delete, modify, check PHP class

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MySQL add, delete, modify, check PHP class

<?php
header("content-type:text/html;charset=utf-8");
class DBUtils{
    /**
     *通用更新方法 insert update delete 操作
     *@param sql
     *@return bool  true false
     */
    public function update($sql){
        $link = $this->getConn();
        mysql_query($sql);
        //如果出错显示
        if(DEBUG){
            echo mysql_error();
        }
        $rs = mysql_affected_rows($link);
        $rs = $rs > 0;
        mysql_close($link);
        return $rs;
    }

MySQL is a relational database developed by the Swedish MySQL AB company and currently belongs to Oracle. MySQL is the most popular relational database management system. In terms of WEB applications, MySQL is one of the best RDBMS (Relational Database Management System) application software. MySQL is a relational database management system that stores data in different tables instead of putting all the data in one big warehouse, which increases speed and flexibility. The SQL language used by MySQL is the most commonly used standardized language for accessing databases. MySQL software adopts a dual authorization policy (this entry "Authorization Policy"), which is divided into community version and commercial version. Due to its small size, fast speed and low total cost of ownership, especially the characteristics of open source, it is generally used by small and medium-sized users. For website development, MySQL is chosen as the website database. Due to the excellent performance of its community version, it can form a good development environment with PHP, Linux and Apache. After years of web technology development, it has become one of the widely used web server solutions in the industry, called LAMP.

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