Php 堆栈空间不足错误
我写的一个查询有点问题(请参见下文)Php 堆栈空间不足错误,php,mysql,sql,Php,Mysql,Sql,我写的一个查询有点问题(请参见下文) createElement(“标记”); $parnode=$dom->appendChild($node); //打开到MySQL服务器的连接 $connection=mysql\u connect(“主机名”、$username、$password); if(!$connection){die('notconnected:'.mysql_error());} //设置活动MySQL数据库 $db\u selected=mysql\u select\u d
createElement(“标记”);
$parnode=$dom->appendChild($node);
//打开到MySQL服务器的连接
$connection=mysql\u connect(“主机名”、$username、$password);
if(!$connection){die('notconnected:'.mysql_error());}
//设置活动MySQL数据库
$db\u selected=mysql\u select\u db($database,$connection);
如果选择了(!$db_){
die('不能使用db:'.mysql_error());
}
$query=“选择userdetails.userid
,detectinglocations.locationid
,detectinglocations.locationname
,findid
,查找.locationid
,finds.findosgb36lat
,finds.findosgb36lon
,找到.dateoftrip
,finds.findcategory
,finds.findname
,finds.finddescription
,查找.detectorsettings
,找到.pasref
,查找。其他注释
,detectors.detectorname
,searchheads.searchheadname
来自用户详细信息、检测位置、发现、检测器、搜索头
其中finds.userid=userdetails.userid
并查找.locationid=检测位置.locationid
并查找。detectorid=检测器。detectorid
和搜索头。detectorid=探测器。detectorid“;
$result=mysql\u query($query);
如果(!$result){
die('无效查询:'.mysql_error());
}
标题(“内容类型:text/xml”);
//遍历行,为每个行添加XML节点
而($row=@mysql\u fetch\u assoc($result)){
//添加到XML文档节点
$node=$dom->createElement(“标记”);
$newnode=$parnode->appendChild($node);
$newnode->setAttribute(“findid”,$row['findid']);
$newnode->setAttribute(“locationid”,$row['locationid']);
$newnode->setAttribute(“locationname”,$row['locationname']);
$newnode->setAttribute(“dateoftrip”,$row['dateoftrip']);
$newnode->setAttribute(“findcategory”,$row['findcategory']);
$newnode->setAttribute(“findname”,$row['findname']);
$newnode->setAttribute(“finddescription”,$row['finddescription']);
$newnode->setAttribute(“detectorname”,$row['detectorname']);
$newnode->setAttribute(“searchheadname”,$row['searchheadname']);
$newnode->setAttribute(“detectorsettings”,$row['detectorsettings']);
$newnode->setAttribute(“pasref”,$row['pasref']);
$newnode->setAttribute(“additionalcomments”,$row['additionalcomments']);
}
echo$dom->saveXML();
?>
当我通过web浏览器运行php脚本时,它会检索正确的数据,但当我通过HTML页面运行该脚本时,会出现“堆栈外”错误。从我在网上读到的内容来看,我认为这可能是因为SQL查询太复杂了
您能否告诉我,过于复杂的SQL查询是否会导致此类错误?您的数据有问题/意外 1) 在每个循环的顶部放置文件内容(“somedumpfile”,var\u export($row,true)),并在进程结束后查看文件中的内容。 2) 如果这样做没有帮助,那么从上到下,一次系统地删除一个作为节点添加的字段。当你不再犯错误时,你找到了罪魁祸首。 3) 如果仍然没有帮助,开始从上到下重新添加字段作为节点 确保PHP错误日志已完全启用,并查看PHP是否在抱怨其他问题。还可以考虑将行索引和PHP的当前内存消耗(memory_get_usage)转储到同一个文件中 祝你好运。分享你的结果 (如果你喜欢/接受这个答案,请投我一票。)
DustinPHP是一种服务器端语言,因此我无法理解“通过web浏览器”和“尽管HTML页面”在本文中的含义以及它们之间的区别。查询肯定不太复杂。你的代码一次只处理一行,你知道每次获取的数据量是有限的。嗨,非常感谢你回复我的帖子。我理解PHP是基于服务器的,但是通过使用PHP文件名并将其输入web浏览器的地址框,您可以看到从“后端”提取的数据。这显然不同于使用html表单作为web地址。我希望这有意义?你好,克里斯
<?php
require("phpfile.php");
// Start XML file, create parent node
$dom = new DOMDocument("1.0");
$node = $dom->createElement("markers");
$parnode = $dom->appendChild($node);
// Opens a connection to a MySQL server
$connection=mysql_connect ("hostname", $username, $password);
if (!$connection) { die('Not connected : ' . mysql_error());}
// Set the active MySQL database
$db_selected = mysql_select_db($database, $connection);
if (!$db_selected) {
die ('Can\'t use db : ' . mysql_error());
}
$query = "SELECT userdetails.userid
, detectinglocations.locationid
, detectinglocations.locationname
, finds.findid
, finds.locationid
, finds.findosgb36lat
, finds.findosgb36lon
, finds.dateoftrip
, finds.findcategory
, finds.findname
,finds.finddescription
, finds.detectorsettings
, finds.pasref
, finds.additionalcomments
, detectors.detectorname
, searchheads.searchheadname
FROM userdetails, detectinglocations, finds, detectors, searchheads
WHERE finds.userid=userdetails.userid
AND finds.locationid=detectinglocations.locationid
AND finds.detectorid=detectors.detectorid
AND searchheads.detectorid=detectors.detectorid";
$result = mysql_query($query);
if (!$result) {
die('Invalid query: ' . mysql_error());
}
header("Content-type: text/xml");
// Iterate through the rows, adding XML nodes for each
while ($row = @mysql_fetch_assoc($result)){
// ADD TO XML DOCUMENT NODE
$node = $dom->createElement("marker");
$newnode = $parnode->appendChild($node);
$newnode->setAttribute("findid",$row['findid']);
$newnode->setAttribute("locationid",$row['locationid']);
$newnode->setAttribute("locationname",$row['locationname']);
$newnode->setAttribute("dateoftrip",$row['dateoftrip']);
$newnode->setAttribute("findcategory",$row['findcategory']);
$newnode->setAttribute("findname",$row['findname']);
$newnode->setAttribute("finddescription",$row['finddescription']);
$newnode->setAttribute("detectorname",$row['detectorname']);
$newnode->setAttribute("searchheadname",$row['searchheadname']);
$newnode->setAttribute("detectorsettings",$row['detectorsettings']);
$newnode->setAttribute("pasref",$row['pasref']);
$newnode->setAttribute("additionalcomments",$row['additionalcomments']);
}
echo $dom->saveXML();
?>