布局文件中定义的默认页面title可以扩展 ( PREPEND/ APPEND) 或替换 ( SET) 为特定于当前视图的标题。
我也一直期待HeadMeta视图助手的这种行为。现在我找不到任何合适的方法来“扩展”默认值descrition/keywords我在布局文件中定义
取而代之的是，我可以使用/添加更多meta标签（类似于使用HeadLink或HeadScript添加样式或脚本文件）。但这对于and没有意义append(...)appendName(...)descritionkeywords meta标签
有推荐的方法来处理这个问题吗？如何处理description/keywords meta标签？
这是我目前正在使用的一个快速而肮脏的解决方法（对于一个干净的解决方案，而不是一个丑陋的解决方法，需要在框架上进行更改）：
HeadMeta 视图助手
<?php
namespace MyNamespace\View\Helper;
use stdClass;
use Zend\View;
use Zend\View\Exception;
use Zend\View\Helper\HeadMeta as ZendHeadMeta;
use Zend\View\Helper\Placeholder\Container\AbstractContainer;
class HeadMeta extends ZendHeadMeta {
const DELIMITER = ' - ';
/**
* @see \Zend\View\Helper\HeadMeta::__invoke()
*/
public function __invoke($content = null, $keyValue = null, $keyType = 'name', $modifiers = array(), $placement = AbstractContainer::APPEND) {
parent::__invoke($content, $keyValue, $keyType, $modifiers, $placement);
return $this;
}
/**
* @see \Zend\View\Helper\HeadMeta::append()
*/
public function append($value) {
if ($value->name == 'description') {
$this->updateDescription($value, AbstractContainer::APPEND);
} else if ($value->name == 'keywords') {
$this->updateKeywords($value, AbstractContainer::APPEND);
} else {
parent::append($value);
}
}
/**
* @see \Zend\View\Helper\HeadMeta::prepend()
*/
public function prepend($value) {
if ($value->name == 'description') {
$this->updateDescription($value, AbstractContainer::PREPEND);
} else if ($value->name == 'keywords') {
$this->updateKeywords($value, AbstractContainer::PREPEND);
} else {
parent::prepend($value);
}
}
// Not working correctly!
// Can cause a
// Fatal error: Maximum function nesting level of '100' reached, aborting!
/**
* @see \Zend\View\Helper\HeadMeta::set()
*/
public function set($value) {
if ($value->name == 'description') {
$this->updateDescription($value, AbstractContainer::SET);
} else if ($value->name == 'keywords') {
$this->updateKeywords($value, AbstractContainer::SET);
} else {
parent::set($value);
}
}
/**
* If a description meta already exsists, extends it with $value->content,
* else creates a new desctiprion meta.
* @param \stdClass $value
* @param string $position
*/
public function updateDescription(\stdClass $value, $position = AbstractContainer::SET) {
$descriptionExists = false;
foreach ($this->getContainer() as $item) {
if ($this->isDescription($item)) {
switch ($position) {
case AbstractContainer::APPEND:
$descriptionString = implode(static::DELIMITER, array($item->content, $value->content));
break;
case AbstractContainer::PREPEND:
$descriptionString = implode(static::DELIMITER, array($value->content, $item->content));
break;
case AbstractContainer::SET:
default:
$descriptionString = $value->content;
break;
}
$item->content = $descriptionString;
$descriptionExists = true;
}
}
if (!$descriptionExists) {
switch ($position) {
case AbstractContainer::APPEND:
parent::append($value);
break;
case AbstractContainer::PREPEND:
parent::prepend($value);
break;
case AbstractContainer::SET:
default:
parent::set($value);
break;
}
}
}
/**
* If a keywords meta already exsists, extends it with $value->content,
* else creates a new keywords meta.
* @param \stdClass $value
* @param string $position
*/
public function updateKeywords(\stdClass $value, $position = AbstractContainer::SET) {
$keywordsExists = false;
foreach ($this->getContainer() as $item) {
if ($this->isKeywords($item)) {
switch ($position) {
case AbstractContainer::APPEND:
$keywordsString = implode(', ', array($item->content, $value->content));
break;
case AbstractContainer::PREPEND:
$keywordsString = implode(', ', array($value->content, $item->content));
break;
case AbstractContainer::SET:
default:
$keywordsString = $value->content;
break;
}
$item->content = $keywordsString;
$keywordsExists = true;
}
}
if (!$keywordsExists) {
parent::append($value);
}
}
/**
* @return description meta text
*/
public function getDescription() {
$description = null;
foreach ($this->getContainer() as $item) {
if ($this->isKeywords($item)) {
$description = $item->content;
break;
}
}
return $description;
}
/**
* @return keywords meta text
*/
public function getKeywords() {
$keywords = null;
foreach ($this->getContainer() as $item) {
if ($this->isKeywords($item)) {
$keywords = $item->content;
break;
}
}
return $keywords;
}
/**
* Checks, whether the input $item is an approproate object for $this->container
* and wheter it's a description object (its name is "description")
* @param stdClass $item
* @throws Exception\InvalidArgumentException
* @return boolean
*/
public function isDescription(stdClass $item) {
if (!in_array($item->type, $this->typeKeys)) {
throw new Exception\InvalidArgumentException(sprintf(
'Invalid type "%s" provided for meta',
$item->type
));
}
return $item->name == 'description';
}
/**
* Checks, whether the input $item is an approproate object for $this->container
* and wheter it's a keywords object (its name is "keywords")
* @param stdClass $item
* @throws Exception\InvalidArgumentException
* @return boolean
*/
public function isKeywords(stdClass $item) {
if (!in_array($item->type, $this->typeKeys)) {
throw new Exception\InvalidArgumentException(sprintf(
'Invalid type "%s" provided for meta',
$item->type
));
}
return $item->name == 'keywords';
}
}
/module/Application/view/layout/layout.phtml
<?php
$this->headMeta()->appendName(
'description',
$this->translate('default description')
);
$this->headMeta()->appendName(
'keywords',
implode(', ', array(
$this->translate('default keyword 1'),
$this->translate('default keyword 2'),
$this->translate('default keyword 3'),
))
);
echo $this->headMeta();
?>
查看脚本
<?php
$this->headMeta()->setName('keywords', implode(
', ',
array(
$this->translate('view specific keyword 1'),
$this->translate('view specific keyword 2'),
$this->translate('view specific keyword 3'),
)
));
$this->headMeta()->setName('description', 'view specific description');
?>
在这里链接到我的答案：How to change meta tags in zend framework layout
这对我有用。在布局文件中，您必须确保回显元标记。它在阶段是空的，但您将标记元标记的输出位置。这种方法的唯一缺点是似乎没有办法拥有默认元标记，因此您必须在每个视图文件中添加元标记。
在布局文件中
<?php echo $this->headMeta(); ?>
在视图 .phtml 文件中
$this->headMeta("test description text", "description");