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opencart中分类页面meta title默认显示的是分类名称，而没有自定义的meta title，官方给出的解释是meta title在google 已经没有作用的所以省略了。但是我们还是习惯自定义的meta title,下面教大家怎么样添加meta title。
修改后台文件
1、修改admin\controller\catalog\category.php，查找
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$this->data[‘entry_meta_keyword’] = $this->language->get(‘entry_meta_keyword’);
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在其上添加
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$this->data[‘entry_meta_title’] = $this->language->get(‘entry_meta_title’);
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2、修改admin\model\catalog\category.php，查找(大约12行)
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foreach ($data[‘category_description’] as $language_id => $value) {
$this->db->query("INSERT INTO " . DB_PREFIX . "category_description SET category_id = ‘" . (int)$category_id . "’, language_id = ‘" . (int)$language_id . "’, name = ‘" . $this->db->escape($value[‘name’]) . "’, meta_keyword = ‘" . $this->db->escape($value[‘meta_keyword’]) . "’, meta_description = ‘" . $this->db->escape($value[‘meta_description’]) . "’, description = ‘" . $this->db->escape($value[‘description’]) . "’");
}
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修改为
[php]
foreach ($data[‘category_description’] as $language_id => $value) {
$this->db->query("INSERT INTO " . DB_PREFIX . "category_description SET category_id = ‘" . (int)$category_id . "’, language_id = ‘" . (int)$language_id . "’, name = ‘" . $this->db->escape($value[‘name’]) . "’, meta_keyword = ‘" . $this->db->escape($value[‘meta_keyword’]) . "’,meta_title = ‘" . $this->db->escape($value[‘meta_title’]) . "’, meta_description = ‘" . $this->db->escape($value[‘meta_description’]) . "’, description = ‘" . $this->db->escape($value[‘description’]) . "’");
}
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继续查找（大约46行）
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foreach ($data[‘category_description’] as $language_id => $value) {
$this->db->query("INSERT INTO " . DB_PREFIX . "category_description SET category_id = ‘" . (int)$category_id . "’, language_id = ‘" . (int)$language_id . "’, name = ‘" . $this->db->escape($value[‘name’]) . "’, meta_keyword = ‘" . $this->db->escape($value[‘meta_keyword’]) . "’, meta_description = ‘" . $this->db->escape($value[‘meta_description’]) . "’, description = ‘" . $this->db->escape($value[‘description’]) . "’");
}
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修改为
[php]
foreach ($data[‘category_description’] as $language_id => $value) {
$this->db->query("INSERT INTO " . DB_PREFIX . "category_description SET category_id = ‘" . (int)$category_id . "’, language_id = ‘" . (int)$language_id . "’, name = ‘" . $this->db->escape($value[‘name’]) . "’, meta_keyword = ‘" . $this->db->escape($value[‘meta_keyword’]) . "’,meta_title = ‘" . $this->db->escape($value[‘meta_title’]) . "’, meta_description = ‘" . $this->db->escape($value[‘meta_description’]) . "’, description = ‘" . $this->db->escape($value[‘description’]) . "’");
}
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继续查找（大约142行）
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‘meta_keyword’ => $result[‘meta_keyword’],
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在其上添加
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‘meta_title’ => $result[‘meta_title’],
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3、修改admin\language\english\catalog\category.php，查找
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$_[‘entry_meta_keyword’] = ‘Meta Tag Keywords:’;
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在其上添加
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$_[‘entry_meta_title’] = ‘Meta Tag Title:’;
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4、修改admin\view\template\catalog\category_form.tpl，查找(大约第35行)
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<tr>
<td><?php echo $entry_meta_description; ?></td>
<td><textarea name="category_description[<?php echo $language[‘language_id’]; ?>][meta_description]" cols="40" rows="5"><?php echo isset($category_description[$language[‘language_id’]]) ? $category_description[$language[‘language_id’]][‘meta_description’] : ”; ?></textarea></td>
</tr>
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在其上添加
[php]
<tr>
<td><?php echo $entry_meta_title; ?></td>
<td><textarea name="category_description[<?php echo $language[‘language_id’]; ?>][meta_title]" cols="40" rows="5"><?php echo isset($category_description[$language[‘language_id’]]) ? $category_description[$language[‘language_id’]][‘meta_title’] : ”; ?></textarea></td>
</tr>
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修改前台文件
修改catalog\controller\product\category.php，查找(大约第75行)
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$this->document->setTitle($category_info[‘name’]);
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修改为
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$this->document->setTitle(empty($category_info[‘meta_title’])?$category_info[‘name’]:$category_info[‘meta_title’]);
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修改数据库
数据库 category_description表中增加meta_title字段，phpmyadmin中运行以下sql语句
[php]
ALTER TABLE `category_description` ADD `meta_title` VARCHAR( 255 ) CHARACTER SET utf8 COLLATE utf8_bin NOT NULL ;
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