我正在使用基于Joomla的CMS网站，我目前在确定如何配对数据库值方面遇到了一些麻烦。我昨天发布了这个问题但删除了它，因为我认为我已经解决了这个问题，而且这个问题的结构很差。希望我能够更清楚地表达我想要完成的事情。如果有必要，我愿意将其发布到开发网站进行审核（假设此处允许）。
话虽如此，我正在查询四张桌子。这四个表格是商品，附件，标签，然后是另一个将标签ID与相关商品ID配对的表格。
您可以在下方看到以下问题：
// Get all Items associated with this category page
// ID of current category
$current_cat = $this->category->id;
// Product IDs array
$product_ids_array = array();
// Product Names Array
$item_names_array = array();
// Product Descriptions Array
$item_descriptions_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'title', 'introtext', 'id' )));
$query->from( $db->quoteName( '#__k2_items' ) );
$query->where( $db->quoteName( 'catid' )." = " .$current_cat );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Store Titles, Descriptions and IDs in arrays
foreach ($row as $value)
{
$item_names_array[] = $value->title;
$item_descriptions_array[] = $value->introtext;
$product_ids_array[] = $value->id;
};
// Now we're going to get the IDs of the tags associated with the items
// Create comma seperated list of product ids
$product_ids = implode(',', $product_ids_array);
// Tag IDs Array
$tag_IDs_array = array();
$tag_itemIDs_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'tagID', 'itemID' )));
$query->from( $db->quoteName( '#__k2_tags_xref' ) );
$query->where($db->quoteName('itemID') . ' IN (' . $product_ids . ' )' );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Store tag IDs and item IDs
foreach ($row as $value)
{
$tag_IDs_array[] = $value->tagID;
$tag_itemIDs_array[] = $value->itemID;
};
// Now we're going to get the names of the tags
// Create comma seperated list of tag ids
$tag_IDs = implode(',', $tag_IDs_array );
// Tag Names Array
$tag_names_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'name' )));
$query->from( $db->quoteName( '#__k2_tags' ) );
$query->where($db->quoteName('id') . ' IN (' . $tag_IDs . ' )' );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Store tag names
foreach ($row as $value)
{
$tag_names_array[] = $value->name;
};
// Now we're going to get the attachments
// Attachments Arrays
$attachment_itemID_array = array();
$attachment_id_array = array();
$attachment_filename_array = array();
$attachment_title_array = array();
$attachment_title_attr_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'id', 'itemID', 'filename', 'title', 'titleAttribute' )));
$query->from( $db->quoteName( '#__k2_attachments' ) );
$query->where($db->quoteName('itemID') . ' IN (' . $product_ids . ' )' );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Store tag names
foreach ($row as $value)
{
$attachment_itemID_array[] = $value->itemID;
$attachment_id_array[] = $value->id;
$attachment_filename_array[] = $value->filename;
$attachment_title_array[] = $value->title;
$attachment_title_attr_array[] = $value->titleAttribute;
};
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'title', 'introtext', 'id' )));
$query->from( $db->quoteName( '#__k2_items' ) );
$query->where($db->quoteName('alias') . ' LIKE '. $db->quote('acid-%') . ' AND ' . $db->quoteName('catid'). ' = ' . $current_cat . ' AND published = 1' );
$db->setQuery( $query );
$row = $db->loadObjectList();
foreach ($row as $value) {
$a = 0;
$a++;
echo $value->title . '<br/>';
echo $value->introtext . '<br/>';
echo $value->id . '<br/>';
}
正如您所看到的，最后一段代码是对数据库的最终查询，我在其中使用通配符语句进行SQL Select。我希望这是动态的。
使其动态化的想法是项目具有与其名称前缀匹配的标签。一个例子是我有一个名为＆＃39;酸腐蚀抑制剂＆＃39;我有一个别名为酸腐蚀抑制剂-aci-136＆＃39;的产品。别名是我可以从DB中检索的内容。
无论如何，问题不在于检索数据。问题是，一旦我掌握了数据如何，我可以智能地将数据配对在一起？正如你在每个实例中从我的查询中看到的那样，我正在拉动itemID，所以我有一些东西需要比较，但从那时起我就失去了。
我基本上试图将项目与其相关标签匹配（每个项目只有一个相应的标签）以及相关的附件。
我希望这很清楚，如果不是，我会回来进一步澄清并回答任何问题。任何帮助将不胜感激。
感谢。
更新＃1
我想知道in_array（）是否适合开始。至少我可以检查itemID是否存在。有点像这样：
if( in_array( $value->id, $attachment_itemID_array ) ) {
echo 'match';
}
我不确定这是否是一种防弹方式，以确保正确的附件与正确的项目等相关联等等。我想它不是，但希望它是＆＃39; sa启动。
更新＃2
开始认为我在返回查询值时只有一个关联数组会更好（在某些情况下）。我认为这样可以更容易确保事情正确匹配。
更新＃3
希望有人觉得这很有用。我试图访问这个怪物：
Array ( [0] => stdClass Object ( [id] => 2 [itemID] => 5 [filename] => Flotek-logo_1.png [title] => Flotek-logo_1.png [titleAttribute] => Flotek-logo_1.png ) [1] => stdClass Object ( [id] => 3 [itemID] => 6 [filename] => Logo_Court_Guru_Gray.png [title] => Logo_Court_Guru_Gray.png [titleAttribute] => Logo_Court_Guru_Gray.png ) [2] => stdClass Object ( [id] => 5 [itemID] => 4 [filename] => Icon_Search.png [title] => Icon_Search.png [titleAttribute] => Icon_Search.png ) )
所以我可以用它来检查当前项ID是否与数组中的itemID匹配，但是当我使用$ array [＆＃39; itemID＆＃39;的行]时，我得到索引未定义错误。 ]。很清楚，我是以错误的方式接近这一点。希望找到一些答案，我发现了几个，但没有任何一个有意义或在某些情况下完全不同的场景。
好的，看起来像：
$attachmentRow[1]->itemID
更新＃4
使用json_decode
计算如何简单地使用数组$attachmentResult = json_decode(json_encode($attachmentRow),true);
结果是
Array ( [0] => Array ( [id] => 2 [itemID] => 5 [filename] => Flotek-logo_1.png [title] => Flotek-logo_1.png [titleAttribute] => Flotek-logo_1.png ) [1] => Array ( [id] => 3 [itemID] => 6 [filename] => Logo_Court_Guru_Gray.png [title] => Logo_Court_Guru_Gray.png [titleAttribute] => Logo_Court_Guru_Gray.png ) [2] => Array ( [id] => 5 [itemID] => 4 [filename] => Icon_Search.png [title] => Icon_Search.png [titleAttribute] => Icon_Search.png ) )
使用长
行时，仍然会收到索引未定义的错误 echo $attachmentResult['itemID'];
仍然试图正确地绕过正确访问关联数组。
没关系。这是正确的方法。
echo $attachmentResult[0]['itemID'];
更新＃5
好吧，我想我得到了它。我找到了一个非常有用的解决方案，可以在这里找到：How to search by key=>value in a multidimensional array in PHP - 非常方便搜索多维数组
更新了查询以循环浏览商品/产品
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'title', 'introtext', 'id' )));
$query->from( $db->quoteName( '#__k2_items' ) );
$query->where($db->quoteName('alias') . ' LIKE '. $db->quote('acid-%') . ' AND ' . $db->quoteName('catid'). ' = ' . $current_cat . ' AND published = 1' );
$db->setQuery( $query );
$row = $db->loadObjectList();
foreach ($row as $value) {
$itemID = $value->id;
$search_result = (search($attachmentResult, 'itemID', $itemID));
if($search_result) {
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'filename' )));
$query->from( $db->quoteName( '#__k2_attachments' ) );
$query->where( $db->quoteName( 'itemID' )." = " .$itemID );
$db->setQuery( $query );
$attachmentRow = $db->loadObjectList();
foreach ($attachmentRow as $attachmentValue) {
echo $attachmentValue->filename;
}
}
echo $value->introtext . '<br/>';
}
答案 0 :(得分：0)
好的，我明白了。我不确定这是否是最优雅的解决方案。如果有人想要改进，我会全神贯注。希望这将有助于将来遇到类似问题的人。
我的最终产品/产品循环查询：
// Get all Items associated with this category page
// ID of current category
$current_cat = $this->category->id;
// Product IDs array
$product_ids_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array('id' )));
$query->from( $db->quoteName( '#__k2_items' ) );
$query->where( $db->quoteName( 'catid' )." = " .$current_cat . ' AND published = 1' );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Store Titles, Descriptions and IDs in arrays
foreach ($row as $value)
{
$product_ids_array[] = $value->id;
};
// Now we're going to get the IDs of the tags associated with the items
// Create comma seperated list of product ids
$product_ids = implode(',', $product_ids_array);
// Tag IDs Array
$tag_IDs_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'tagID', 'itemID' )));
$query->from( $db->quoteName( '#__k2_tags_xref' ) );
$query->where($db->quoteName('itemID') . ' IN (' . $product_ids . ' )' );
$db->setQuery( $query );
$row = $db->loadObjectList();
$tagsRow = $db->loadObjectList();
$tagsResult = array();
$tagsResult = json_decode(json_encode($tagsRow),true);
// Store tag IDs and item IDs
foreach ($row as $value)
{
$tag_IDs_array[] = $value->tagID;
};
// Now we're going to get the names of the tags
// Create comma seperated list of tag ids
$tag_IDs = implode(',', $tag_IDs_array );
// Tag Names Array
$tag_names_array = array();
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'name' )));
$query->from( $db->quoteName( '#__k2_tags' ) );
$query->where($db->quoteName('id') . ' IN (' . $tag_IDs . ' )' );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Store tag names
foreach ($row as $value)
{
$tag_names_array[] = $value->name;
};
// Now we're going to get the attachments
// Attachments Arrays
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'id', 'itemID', 'filename', 'title', 'titleAttribute' )));
$query->from( $db->quoteName( '#__k2_attachments' ) );
$query->where($db->quoteName('itemID') . ' IN (' . $product_ids . ' )' );
$db->setQuery( $query );
$attachmentRow = $db->loadObjectList();
$attachmentResult = array();
$attachmentResult = json_decode(json_encode($attachmentRow),true);
// Function to search multidimensional arrays
function search($array, $key, $value)
{
$results = array();
if (is_array($array)) {
if (isset($array[$key]) && $array[$key] == $value) {
$results[] = $array;
}
foreach ($array as $subarray) {
$results = array_merge($results, search($subarray, $key, $value));
}
}
return $results;
}
// Now we're going to create our product loop
// Get Tag Names
foreach( $tag_names_array as $display_tag_name ) {
// Unformatted Tag Name - this is the one that will be displayed on the front end
$unformatted_display_tag_name = $display_tag_name;
// Convert Tag Name White Spaces to Dashes
$display_tag_name = preg_replace("/[\s_]/", "-", $display_tag_name);
// Lower Case Tag Name
$display_tag_name = strtolower($display_tag_name);
switch ( $display_tag_name == $display_tag_name ) {
case $display_tag_name:
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'title', 'introtext', 'id' )));
$query->from( $db->quoteName( '#__k2_items' ) );
$query->where($db->quoteName('alias') . ' LIKE '. $db->quote($display_tag_name.'-%') . ' AND ' . $db->quoteName('catid'). ' = ' . $current_cat . ' AND published = 1' );
$db->setQuery( $query );
$row = $db->loadObjectList();
// Start Row
echo '<div class="row">';
// Start 12 Column
echo '<div class="col-lg-12">';
// Start Row
echo '<div class="row">';
// Start Item Container
echo '<section class="item-container">';
// Display Tag Name
echo '<div class="col-lg-12"><section class="tag-name"><a href="#">' . $unformatted_display_tag_name . '</a></section></div>';
foreach ($row as $value) {
// Start Column 6
echo '<div class="col-lg-6 is-hidden">';
// Store ID of item
$itemID = $value->id;
// Search attachmentResult array
$attachment_search_result = (search($attachmentResult, 'itemID', $itemID));
// Check to see if there are any associated attachments - display attachment is present
if($attachment_search_result) {
$db = JFactory::getDbo();
$query = $db->getQuery( true );
$query->select($db->quoteName(array( 'filename' )));
$query->from( $db->quoteName( '#__k2_attachments' ) );
$query->where( $db->quoteName( 'itemID' )." = " .$itemID );
$db->setQuery( $query );
$attachmentRow = $db->loadObjectList();
foreach ($attachmentRow as $attachmentValue) {
echo $attachmentValue->filename . '<br/>';
}
}
// Display Item Title
echo '<h5>' .$value->title. '</h5>';
// Display Item Text
echo '<p>' .$value->introtext. '</p>';
// End Column 6
echo '</div>';
}
// Close Item Container
echo '</section>';
// Close Row
echo '</div>';
// Close 12 Column
echo '</div>';
// Close Row
echo '</div>';
}
}
?>
<!-- /Display Category Items -->