Php 需要帮助配对数据库值吗

我正在一个基于Joomla的CMS网站上工作，目前在弄清楚如何匹配数据库值方面遇到了一些问题。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糟糕。希望我能更好地表达我想要实现的目标。如果这里允许的话，我愿意把这篇文章发布到开发人员的网站上进行审查

说到这里，我查询了四个表。这四个表是items、attachments、tags，然后是另一个将tag ID与相关item ID配对的表

您可以在下面看到这些查询：

        // Get all Items associated with this category page

    // ID of current  category

    $current_cat = $this->category->id;

    // Product IDs array

    $product_ids_array = array();

    // 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/>';

    }

我不确定这是否是一个防弹的方法，以确保正确的附件链接到正确的项目，等等。我想这不是，但希望这是一个开始

更新2

我开始认为，在某些情况下，在返回查询值时使用关联数组会更好。我想这会让你更容易确定事情是否正确匹配

更新3

希望有人觉得这个有用。我正在尝试访问此怪物：

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 ) ) 

因此，我可以使用它来检查当前项ID是否与数组中的项ID匹配，但在使用$array['itemID']行时，我得到了一个未定义索引的错误；很明显，我是用错误的方式处理这件事的。希望找到一些答案，我发现了一些但没有任何一个对完全不同的场景有意义的答案

好的，看起来像：

$attachmentRow[1]->itemID

这就是答案。现在我想知道是否有更好的方法访问它，因为我无法知道对象的索引。至少，我更愿意梳理关联数组中的每个对象

更新4

了解了如何使用json_解码简化数组

$attachmentResult = json_decode(json_encode($attachmentRow),true);

导致

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 ) ) 

当使用某个较长的行时，仍然会出现索引未定义的错误

 echo $attachmentResult['itemID'];

仍然在试图正确地访问关联数组

没关系。这是正确的方法

echo $attachmentResult[0]['itemID'];

更新5

好吧，我想我差不多明白了。我在这里找到了一个非常有用的解决方案：-非常方便搜索多维数组

已更新的项目/产品循环查询

        $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/>';

    }

---

好的，我让它工作了。我不确定这是否是最优雅的解决方案。如果有人想附和改进，我洗耳恭听。希望这能帮助将来有类似问题的人

我的最终项目/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 -->

警告：不要忘记调用$db->quote。。。在任何需要转义的值上。

    // 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 -->