Question

好吧所以我正在做一个mysql选择，如果没有结果那么我们将插入它如果有结果我们更新它但我得到了解析错误：语法错误，意外T_VARIABLE

这是我的完整代码

$query = mysql_query("SELECT * from new_battles WHERE player1='".$_SESSION['username']."'");
if(mysql_num_rows($query)!=0)
{# If row already exists, then update it.

$result2 = mysql_query("UPDATE new_battles SET player1 = '"$_SESSION['username']"' AND player2 = '"$_SESSION['vsuser']"' 
AND onpokemonplayer1 = '1'  AND onpokemonplayer2 = '1'  WHERE player1 = '"$_SESSION['username']"' ")
or die(mysql_error());
}
else
{# If row doesn't exist, then insert row.
$result = mysql_query("INSERT INTO new_battles (player1, player2,onpokemonplayer1,onpokemonplayer2) VALUES('"$_SESSION['username']"', '"$_SESSION['vsuser']"' , '1', '1')")
or die(mysql_error());
}

它说错误是在mysql更新位上...也许我正在使用许多和??? ???

Answer 1

您忘记了.在查询中连接变量：

$result2 = mysql_query("UPDATE new_battles
            SET player1 = '".$_SESSION['username']."',
            player2 = '".$_SESSION['vsuser']."',
            onpokemonplayer1 = '1',
            onpokemonplayer2 = '1'
            WHERE player1 = '".$_SESSION['username']."' ") or die(mysql_error());

编辑：正如评论中所提到的那样，UPDATE查询错误，要更新多个字段，需要用逗号分隔它们而不是AND。

Answer 2

每个语法错误都必须处理string concatenation：

<?php
$query = mysql_query("SELECT * from new_battles WHERE player1='".$_SESSION['username']."'");
if(mysql_num_rows($query)!=0){# If row already exists, then update it.

    $result2 = mysql_query("UPDATE new_battles SET player1 = '".$_SESSION['username']."' AND player2 = '".$_SESSION['vsuser']."' 
    AND onpokemonplayer1 = '1'  AND onpokemonplayer2 = '1'  WHERE player1 = '".$_SESSION['username']."' ")
    or die(mysql_error());
}else{# If row doesnt exist, then insert row.
    $result = mysql_query("INSERT INTO new_battles (player1, player2,onpokemonplayer1,onpokemonplayer2) VALUES('".$_SESSION['username']."', '".$_SESSION['vsuser']."' , '1', '1')") or die(mysql_error());
}?>

语法错误无法看到它出错了

2 个答案: