Question

我收到以下错误：

警告：mysql_fetch_assoc（）期望参数1是资源，第19行/home/inv/public_html/set.php中给出的布尔值

第19行是：

    $row = mysql_fetch_assoc($result);

完整代码：

<?php

$sitename = "ASDASDCSGO";

$link = mysql_connect("localhost", "x", "y");

$db_selected = mysql_select_db('x', $link);

mysql_query("SET NAMES utf8");



function fetchinfo($rowname,$tablename,$finder,$findervalue) {

    if($finder == "1") $result = mysql_query("SELECT $rowname FROM $tablename");

    else $result = mysql_query("SELECT $rowname FROM $tablename WHERE `$finder`='$findervalue'");

    $row = mysql_fetch_assoc($result);

    return $row[$rowname];

}

?>

Answer 1

生成此警告是因为$ result为null。检查你的结果是否是布尔值。

    <?php

$sitename = "ASDASDCSGO";

$link = mysql_connect("localhost", "x", "y");

$db_selected = mysql_select_db('x', $link);

mysql_query("SET NAMES utf8");



function fetchinfo($rowname,$tablename,$finder,$findervalue) {
     // you can't access php variable as a string in query
    if($finder == "1") $result = mysql_query("SELECT '.$rowname.' FROM '.$tablename.'");

    else $result = mysql_query("SELECT '.$rowname.' FROM '.$tablename.' WHERE '.$finder.'='.$findervalue.'");

    if(!is_bool($result)){ // this is for checking your $result varible is boolean or not
    $row = mysql_fetch_assoc($result);
    }else{
    echo "Error";
    }

    return $row[$rowname];

}

?>

Answer 2

<?php
function fetchinfo($rowname,$tablename,$finder,$findervalue) {

    if($finder == "1") $result = mysql_query("SELECT $rowname FROM $tablename");

    else $result = mysql_query("SELECT ".$rowname." FROM ".$tablename." WHERE ".$finder."=".$findervalue."");

    $row = mysql_fetch_assoc($result);

    return $row[$rowname];

}

或者您可以像这样使用您的查询

mysql_query('SELECT {$rowname} FROM {$tablename} WHERE {$finder}={findervalue}');

警告：mysql_fetch_assoc

2 个答案: