Question

我是PHP新手。如果数据存在，我需要帮助制作一个PHP代码来更新MySQL中的数据，如果还没有，那么在MySQL中插入数据..我已经制作了PHP代码但是数据已存在时插入数据..在MySQL中..请帮忙

$con = mysql_connect('localhost','root','root');
$db  = mysql_select_db('gamingtracker',$con);
$query = "SELECT * FROM servers WHERE sgame='$game_insert'";
  $result = mysql_query($query, $con);
While($row = mysql_fetch_array($result)) { 
$id = @$row['id']; 
$sname = @$row['sname']; 
$sgame = @$row['sgame']; 
$minplayers = @$row['minplayers']; 
$maxplayers = @$row['maxplayers']; 
$ip = @$row['ip']; 
$port = @$row['port']; 
$map = @$row['map'];
}



$sname1= html_entity_decode("{$server['s']['name']}");

      if(@$sname=="{$server['s']['name']}" 
      AND @$sgame=="{$server['s']['game']}" 
      AND @$minplayers=="{$server['s']['players']}" 
      AND @$maxplayers=="{$server['s']['playersmax']}" 
      AND @$ip=="{$server['b']['ip']}" 
      AND @$port=="{$server['b']['c_port']}" 
      AND @$map=="{$server['s']['map']}" ) 
      { 
  $query1 = "UPDATE servers
  SET sname='$sname1', sgame='{$server['s']['game']}', minplayers='{$server['s']['players']}', maxplayers='{$server['s']['playersmax']}', ip='{$server['b']['ip']}', port='{$server['b']['port']}', map='{$server['s']['map']}'
  WHERE ip='{$server['b']['ip']}', port='{$server['b']['port']}', sgame='{$server['s']['game']}'";
  $result1 = mysql_query($query1, $con);
  } 
      else { 
  $query1 = "INSERT INTO servers (id,sname,sgame,maxplayers,minplayers,ip,port,map) VALUES ('','$sname1','{$server['s']['game']}','{$server['s']['players']}','{$server['s']['playersmax']}','{$server['b']['ip']}','{$server['b']['c_port']}','{$server['s']['map']}')";
  $result1 = mysql_query($query1, $con);
  }

Answer 1

所以你只需要为ip，port和sgame的每个独特组合输入一个条目？最简单的方法是让mysql处理这个。

首先，在表格上为这些字段创建唯一索引。在mysql中运行以下命令：

CREATE UNIQUE INDEX ip_port_sgame ON servers (ip, port, sgame);

然后，使用REPLACE而不是运行INSERT查询。所以只需在php中更改这一行：

UPDATE servers

到

REPLACE INTO servers

如何通过PHP更新/插入MySQL表中的数据

1 个答案: