我有一些PHP脚本,我认为这有很多错误。因为我在连接和SQL注入方面的知识有限。在第一次我没有任何麻烦,因为这个脚本使用PHP-Mysql。
但在我尝试转入Interbase后,我遇到了很多麻烦。 请帮助确定我的错误。
我的以下查询:
$sLimit = "";
if ( isset( $_POST['iDisplayStart'] ) )
{
$sLimit = " FIRST ".$_POST['iDisplayStart']." SKIP ".$_POST['iDisplayLength'];
}
$sOrder ="";
$sOrder = " ORDER BY LINE_NAME ";
$sWhere = "";
if (postVar('sSearch') !="" )
{
$sWhere = " WHERE (LINE_NAME LIKE '%".$_POST['sSearch']."%' OR
MODEL_ONLY LIKE '%".$_POST['sSearch']."%' OR ".
" VER_ONLY LIKE '%".$_POST['sSearch']."%' OR ".
" LOT_SIZE LIKE '%".$_POST['sSearch']."%' OR ".
" START_SERIAL LIKE '%".$_POST['sSearch']."%' OR ".
" SERIAL_NO_LOW LIKE '%".$_POST['sSearch']."%' OR ".
" SERIAL_NO_UP LIKE '%".$_POST['sSearch']."%' OR ".
" PROD_NO LIKE '%".$_POST['sSearch']."%' OR ".
" PROD_DATE LIKE '%".$_POST['sSearch']."%') ";
}
$sQuery = "SELECT LINE_NAME, MODEL_ONLY, VER_ONLY, PROD_NO,
LOT_SIZE, START_SERIAL, SERIAL_NO_LOW, SERIAL_NO_UP, PROD_DATE
FROM DOC_TO".$sWhere.$sOrder.$sLimit.";";
$rResult = ibase_query( $sQuery) or _doError(_ERROR30 . ' (<small>' . htmlspecialchars($sql) . '</small>): ' . ibase_errmsg() );
$sQuery = "SELECT COUNT(*) FROM (SELECT LINE_NAME, MODEL_ONLY, VER_ONLY, PROD_NO,
LOT_SIZE, START_SERIAL, SERIAL_NO_LOW, SERIAL_NO_UP, PROD_DATE
FROM DOC_TO'.$sWhere.$sOrder.$sLimit.')";
$rResultFilterTotal = ibase_query( $sQuery) or _doError(_ERROR30 . ' (<small>' . htmlspecialchars($sql) . '</small>): ' . ibase_errmsg() );
$aResultFilterTotal = ibase_fetch_assoc($rResultFilterTotal);
$iFilteredTotal = $aResultFilterTotal[0];
注意:我需要了解更多关于连接的信息。谢谢你的进步。
错误:
Dynamic SQL Error SQL error code = -104 Token unknown - line 3, column 39 '.. ORDER BY LINE_NAME ..'
答案 0 :(得分:3)
看起来好像可以运行,所以如果失败请描述一下。
然而,其中有一个立即可见的错误:在行
中$sQuery = "SELECT COUNT(*) FROM (SELECT LINE_NAME, MODEL_ONLY, VER_ONLY, PROD_NO,
LOT_SIZE, START_SERIAL, SERIAL_NO_LOW, SERIAL_NO_UP, PROD_DATE
FROM DOC_TO'.$sWhere.$sOrder.$sLimit.')";
您正在使用双引号启动一个字符串,并尝试使用单引号中断字符串,这将无效。所以代码必须是:
$sQuery = "SELECT COUNT(*) FROM (SELECT LINE_NAME, MODEL_ONLY, VER_ONLY, PROD_NO,
LOT_SIZE, START_SERIAL, SERIAL_NO_LOW, SERIAL_NO_UP, PROD_DATE
FROM DOC_TO".$sWhere.$sOrder.$sLimit.")";
除了您的环境之外,您的代码中还存在一个重要的安全漏洞:例如,在
行中$sLimit = " FIRST ".$_POST['iDisplayStart']." SKIP ".$_POST['iDisplayLength'];
您正在使用$ _POST将其直接放入SQL查询中,这会打开一个所谓的SQL注入安全漏洞。
答案 1 :(得分:-1)
我从AndreKR的指导中找到答案:
$sLimit = "";
if ( isset( $_POST['iDisplayStart'] ) )
{
settype($iDisplayStart,'integer');
$iDisplayStart = $_POST['iDisplayStart'];
$iDisplayLength = $_POST['iDisplayLength'];
$sLimit = sprintf(" FIRST ".$iDisplayStart." SKIP ".$iDisplayLength);
}
并更改所有$ _POST:
'%".$_POST['sSearch_0']."%'
into
''%".$_POST['sSearch_0']."%'' //this to prevent injection For databases Like Oracle, DB2, MS SQL, Firebird
并改变:
$sQuery = "SELECT COUNT(*) FROM(......)
into
$sQuery = "SELECT COUNT(*) AS DCOUNT FROM DOC_TO".$sWhere.$sLimit.";"; //delete $sOrder
$aResultFilterTotal = ibase_fetch_assoc($rResultFilterTotal);
$iFilteredTotal = $aResultFilterTotal['DCOUNT']; //change from ......[0]
并在最后一个php页面添加:
ibase_free_result($aResultTotal);
?>