PHP database comparison tool sharing

<?phpdefine("DSN",&#39;mysql:host=127.0.0.1;port=3306;dbname=gmsys&#39;);//gm数据库配置define("SRC_DB","ea_role");
define("TARGET_DB","game_role");
define("USER","LiMing");
define("PASS","");
define("FILE_NAME","updateSQL.sql");//获取数据库结构//数据库名称，链接，返回所有表，所有表的结构<tableName,<tableName,fields>>，表的属性值function getDBStructure($db_name,$pdo,&$tables,&$db_stru,&$table_status){
    # code...
    //获取SRC_DB 的数据库结构
    $pdo->query("use ".$db_name);
    print_r("<pre class="brush:php;toolbar:false">");    //表属性
    foreach ($pdo->query("show table status") as $key => $value) {        # code...
        $table_status[$value[0]] = $value;

    }    //echo PHP_EOL;

    foreach ($pdo->query("show tables") as $key => $value) {        # code...
        $tables[$key] = $value[0];//表名
        //echo $value[0]."|";
    }    //echo PHP_EOL;
    foreach ($tables as $key => $name) {        # code...
        //echo $name .PHP_EOL;
        $table = null;//记得初始化
        foreach ($pdo->query("desc ".$name) as $key => $value) {            # code...
            $table[$value[0]] = $value; //字段名 ——> 字段属性
            //echo $value[0] ."|";
        }        //echo PHP_EOL;
        $db_stru[$name] = $table; //表名 -> 表结构
    }

}//生成创建数据库的sql// 表名  表结构function createTableSQl($name,$table){
    # code...
    $pri_key =  array();    $mul_key =  array();    $sql = "CREATE TABLE `{$name}` (";    foreach ($table as $key => $value) {        # code...
        $field = $value[0];//字段名
        $type = $value[1]; //字段类型
        $null = $value[2]; //是否为空 YES NO
        $key = $value[3]; //PRI MUL
        $default = $value[4]; //字段类型 
        $extal = $value[5];//
        $isNUll = "";        if ($null == "YES") {            # code...
            $isNUll = "not null";
        }        //$defaultMsg = $default;
        if (!is_null($default)) {            # code...
            $default = " default {$default}";
        }        if ($key == "PRI") {            # code...
            array_push($pri_key, $field);
        }        else if ($key == "MUL") {            # code...
            array_push ($mul_key, $field);
        }        //拼接字符串
        $row = "`{$field}` {$type} {$isNUll} {$default},";        $sql = $sql . PHP_EOL . $row  ;
    }    //添加主键
    if (!empty($pri_key)) {    # code...

        $sql = $sql . PHP_EOL."PRIMARY KEY (";        foreach ($pri_key as $v) {            # code...
            $sql = $sql."`{$v}`,";
        }        $sql = substr($sql, 0,strlen($sql)-1);        $sql = $sql . ")," ;
    }        //拼接主键
    if (!empty($mul_key)) {        # code...

        foreach ($mul_key as  $v) {            # code...
            $sql = $sql . PHP_EOL . "key `{$v}` ({$v}),";
        }
    }    $sql = substr($sql, 0,strlen($sql)-1);//去掉最后一个‘，’

    $sql = $sql . PHP_EOL . ");".PHP_EOL;    return $sql;
}//生成update文件// $fields <tabName,field>//ALTER TABLE `familyer`  ADD COLUMN   `joinfightdata` blob AFTER `ssfightblob`;function genUpdateSQL($fields){
    $updateSql=null ;    foreach ($fields as $tab_name => $value) {        # code...
        foreach ($value as $key => $v) {            # code...
            $isNUll = "";            if ($v[2] == "YES") {                # code...
                $isNUll = "NOT NULL";
            }            $default = $v[4];            if (!is_null($default)) {                # code...
                $default = " default {$default}";
            }            $updateSql = $updateSql . "ALTER TABLE `{$tab_name}` ADD COLUMN `{$v[0]}` {$v[1]} {$isNUll} {$default};".PHP_EOL;
        }        $updateSql = $updateSql.PHP_EOL;
    }    return $updateSql;
}//比价数据库结构//dst_db 有 src_db 没有 返回表字段数组function cmp($src_db,$dst_db){
    $tables =array();//dst有 但是src中没有的表 <tale>
    $fields = array();//表名 -> <字段名，字段属性>
    foreach ($dst_db as $key => $value) {        # code...
        if ( array_key_exists($key,$src_db) ) {//如果存在比较字段
            # code...
            $tmp = array_diff_key($value,$src_db[$key]);            if ( !empty($tmp) )  {                # code...
                $fields[$key]=$tmp;
            }
        }        else
            array_push($tables,$key);
    }    return $fields;
}$pdo = new PDO(DSN, USER, PASS);//创建数据库链接//源数据库结构$src_tables= NULL;//表名数组$src_db = NULL;    //数据库结构 表名->表字段$src_table_status = NULL; //表属性 name -> 属性getDBStructure(SRC_DB,$pdo,$src_tables,$src_db,$src_table_status);//目的数据库结构$dst_tables =NULL;$dst_db=null;$dst_table_status=null;
getDBStructure(TARGET_DB,$pdo,$dst_tables,$dst_db,$dst_table_status);$cmp_table = array_diff($dst_tables,$src_tables);$cmp_fields = cmp($src_db,$dst_db);//print_r($cmp_table);$text = null;foreach ($cmp_table as  $value) {    # code...
    if ( !strchr($value,"pvprankreward") ) {        # code...
        $text = $text.createTableSQl($value,$dst_db[$value]);
    }

}$text = $text . genUpdateSQL($cmp_fields);$myfile = fopen(FILE_NAME,"w");
fwrite($myfile, $text);
fclose($myfile);//对比数据库结构 返回差异 表//cmp($dst_db,$src_db);//对比表结构返回有差异的表//$str = createTableSQl($src_tables[0],$src_db[$src_tables[0]]);//$myfile = fopen("SQL.sql","w");//fwrite($myfile, $str);//fclose($myfile);// print_r("<pre class="brush:php;toolbar:false">");//print_r($src_db["pvprankreward170525"]);//print_r($src_table_status["role"]);?>