Mysqli查询插入问题

Question

查询插入不正确时出现问题。

当我有线时

mysqli_query($GLOBALS["___mysqli_ston"], "INSERT INTO emailerdata (`emailer_timestamp`,`emailer_promoID`,`emailer_name`,`emailer_username`,`emailer_usermd5`,`emailer_email`,`emailer_md5`,`emailer_reactionID`) VALUES ('$date','$promoID','$rec_info[2]','$row[1]','$usermd5','$rec_info[0]','$passmd5','$row[0]')") or die("Error: ". ((is_object($GLOBALS["___mysqli_ston"])) ? mysqli_error($GLOBALS["___mysqli_ston"]) : (($___mysqli_res = mysqli_connect_error()) ? $___mysqli_res : false)). "     with query ". mysqli_query);

就其本身而言，它可以很好地插入。但是，当我尝试检查我的数据库中的电子邮件地址是否已在查询中插入带有该特定促销 ID 时，它不会插入。

我找不到查询有什么问题，我确定它很简单，但它没有在 or die 上显示错误？

$row_amt = mysqli_query($GLOBALS["___mysqli_ston"], "SELECT * from emailerdata where emailer_promoID='$promoID' and emailer_username='$downloadusername'");
    while($row4 !== mysqli_fetch_assoc($row_amt)) {     
    mysqli_query($GLOBALS["___mysqli_ston"], "INSERT INTO emailerdata (`emailer_timestamp`,`emailer_promoID`,`emailer_name`,`emailer_username`,`emailer_usermd5`,`emailer_email`,`emailer_md5`,`emailer_reactionID`) VALUES ('$date','$promoID','$rec_info[2]','$row[1]','$usermd5','$rec_info[0]','$passmd5','$row[0]')") or die("Error: ". ((is_object($GLOBALS["___mysqli_ston"])) ? mysqli_error($GLOBALS["___mysqli_ston"]) : (($___mysqli_res = mysqli_connect_error()) ? $___mysqli_res : false)). "     with query ". mysqli_query); 
    }

非常感谢！

Answer 1

使用函数 mysqli_num_rows 通过查询

检查行数 return

$row_amt = mysqli_query($GLOBALS["___mysqli_ston"], "SELECT * from emailerdata where emailer_promoID='$promoID' and emailer_username='$downloadusername'");
$rowcount=mysqli_num_rows($row_amt);
if($rowcount == 0) {     
    mysqli_query($GLOBALS["___mysqli_ston"], "INSERT INTO emailerdata (`emailer_timestamp`,`emailer_promoID`,`emailer_name`,`emailer_username`,`emailer_usermd5`,`emailer_email`,`emailer_md5`,`emailer_reactionID`) VALUES ('$date','$promoID','$rec_info[2]','$row[1]','$usermd5','$rec_info[0]','$passmd5','$row[0]')") or die("Error: ". ((is_object($GLOBALS["___mysqli_ston"])) ? mysqli_error($GLOBALS["___mysqli_ston"]) : (($___mysqli_res = mysqli_connect_error()) ? $___mysqli_res : false)). "     with query ". mysqli_query); 
}else{
    echo 'Email is already registered.';
}

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