如何附加到字符串中的所有网址？

Question

我应该如何去附加到所有将被发送为电子邮件的html字符串中的所有url的末尾？我想在谷歌分析跟踪活动添加到它是这样的：页面
?utm_source=email&utm_medium=email&utm_campaign=product_notify

99％不会“的.html”结束，某些URL可能会在他们结束已经有类似的东西?sr=1。

Answer 1

嗯...你可以做这样的事情：

function AppendCampaignToString($string) { 
    $regex = '#(<a href=")([^"]*)("[^>]*?>)#i'; 
    return preg_replace_callback($regex, '_appendCampaignToString', $string); 
} 
function _AppendCampaignToString($match) { 
    $url = $match[2]; 
    if (strpos($url, '?') === false) { 
     $url .= '?'; 
    } 
    $url .= '&utm_source=email&utm_medium=email&utm_campaign=product_notify'; 
    return $match[1].$url.$match[3]; 
} 

这应该会自动查找网页上所有链接（即使是外部因素，所以要小心）。这个？检查只是确保我们附加一个查询字符串...

编辑：修正了在正则表达式没有按预期工作的问题。

Answer 2

您可以使用以下代码片段将您的Google Analytics分析GET参数附加到当前脚本URI的现有参数。

function getQuery() { 

$url = parse_url($_SERVER['REQUEST_URI']); 

return $url['query'].'&utm_source=email&utm_medium=email&utm_campaign=product_notify'; 
} 

Answer 3

<?php 
$add = array(
'utm_source'=>'email', 
'utm_medium'=>'email' 
'utm_campaign'=>'product_notify'); 
$doc = new DOMDocument(); 
$doc->loadHTML('your html'); 
foreach($doc->getElementsByTagName('a') as $link){ 
    $url = parse_url($link->getAttribute('href')); 
    $gets = isset($url['query']) ? array_merge(parse_str($url['query'])) : $add; 
    $newstring = ''; 
    if(isset($url['scheme'])) $newstring .= $url['scheme'].'://'; 
    if(isset($url['host'])) $newstring .= $url['host']; 
    if(isset($url['port'])) $newstring .= ':'.$url['port']; 
    if(isset($url['path'])) $newstring .= $url['path']; 
    $newstring .= '?'.http_build_query($gets); 
    if(isset($url['fragment'])) $newstring .= '#'.$url['fragment']; 
    $link->setAttribute('href',$newstring); 
} 
$html - $doc->saveHTML(); 
?> 

Answer 4

我的解决方案我已经建立了&测试昨晚：

我只匹配这不已经有“utm_”之类的查询参数的链接，但包括以“utm_”链接作为部分路径：在查询另一个参数名称的参数或子字符串之前，比如“xutm_”。

为此，我已经使用正面和负面的正则表达式模式断言的组合（http://php.net/manual/en/regexp.reference.assertions.php）

我也允许标签之前有其他的属性和之后的href

$pattern = '/<a[^>]*href="(?=(.(?!(\?|&)utm_))*?>)[^"]*/i'; 

所有链接匹配它没有'utm_'也没有'& utm_'在href标记

然后，我使用类回调函数解决方案，以便能够传递查询参数被附加（作为额外参数RS回调）

class link_params{ 
    private $parameters;  

    function __construct($params){ 
    $this->parameters = $params; 
    } 

    function callback($matches){ 
    return $matches[0] . (preg_match('/\\?[^"]/', $matches[0]) ? '&' : '?') . http_build_query($this->parameters); 
    } 
} 

准备，我要添加到链接查询参数：

$params_to_add = array(
    'utm_source' => 'newsletter-sep13', 
    'utm_medium' => 'email', 
    'utm_campaign' => 'product-X' 
); 

$callback_helper = new link_params($params_to_add); 

最后我申请的preg_replace_callback函数是这样的：

$html = preg_replace_callback($pattern, array($callback_helper, 'callback'), $html); 

Answer 5

更新到@ ircmaxell的答案，即使在代码简化之前存在属性，正则表达式现在也可以匹配。

/** 
* @param string $body 
* @param string $campaign 
* @param string $medium 
* @return mixed 
*/ 
protected function add_analytics_tracking_to_urls($body, $campaign, $medium = 'email') { 
    return preg_replace_callback('#(<a.*?href=")([^"]*)("[^>]*?>)#i', function($match) use ($campaign, $medium) { 
     $url = $match[2]; 
     if (strpos($url, '?') === false) { 
      $url .= '?'; 
     } else { 
      $url .= '&'; 
     } 
     $url .= 'utm_source=' . $medium . '&utm_medium=' . $medium . '&utm_campaign=' . urlencode($campaign); 
     return $match[1] . $url . $match[3]; 
    }, $body); 
} 

Answer 6

这里是我的解决方案，简单的问题，但相当复杂的解决方案与

$campaign = (object)['utm_source' => 'email', 'utm_medium' => 'email', 'utm_campaign' => 'abc']; 
$host = 'www.me.com'; 

$html = preg_replace_callback(
     '#(<a.*?href=["\']?)(?<href>https?://[^\s"\']+)(["\']?.*?>.*?</a>)#si', function ($matches) use ($campaign, $host) { 
    $url = parse_url($matches['href']); 
    // if (isset($url['host']) && $url['host'] !== $host) return $matches[0]; 
    parse_str(isset($url['query']) ? $url['query'] : '', $query); 
    $query = array_merge(
     $query, array_filter(
        [ 
         'utm_source' => $campaign->utm_source, 
         'utm_medium' => $campaign->utm_medium, 
         'utm_term' => $campaign->utm_term, 
         'utm_content' => $campaign->utm_content, 
         'utm_campaign' => $campaign->utm_campaign, 
        ] 
      ) 
    ); 
    return $matches[1] . // anchor part before url 
    (isset($url['scheme']) ? $url['scheme'] . '://' : '') . 
    (isset($url['user']) ? $url['user'] : '') . 
    (isset($url['pass']) ? (isset($url['user']) ? ':' : '') . $url['pass'] : '') . 
    (isset($url['user']) || isset($url['pass']) ? '@' : ''). 
    (isset($url['host']) ? $url['host'] : '') . 
    (isset($url['port']) ? ':' . $url['port'] : '') . 
    (isset($url['path']) ? $url['path'] : '') . 
    '?' . http_build_query($query) . 
    (isset($url['fragment']) ? '#' . $url['fragment'] : '') . 
    $matches[3]; // anchor part after URL 
}, $html 
); 

最后一部分（CONCAT URL）所有的工作在URL类型也可以替换为http_build_url()，但你将需要启用HTTP扩展。

<a href="http://www.me.com">Lorem</a> 
<a href="http://www.me.com/">ipsum</a> 
<a href="http://www.me.com/#section-2">dolor</a> 
<a href="http://www.me.com/path-to-somewhere/file.php">sit</a> 
<a href="http://www.me.com/?">amet</a> 
<a href="http://www.me.com/?foo=bar">consectetur</a> 
<a href="http://www.me.com/?foo=bar&bar=foo">consectetur</a> 
<a href="http://www.NOTME.com?utm_source=XXX&utm_medium=XXX&utm_campaign=XXX">existing utm params</a> 
<a href="http://user:password@www.me.com/?foo=bar#section-3">elit</a> 
<a href="http://user:@www.me.com/?foo=bar#section-3">elit</a> 
<a href="http://user@www.me.com?foo=bar#section-3">elit</a> 

与结果如下：

<a href="http://www.me.com?utm_source=email&utm_medium=email&utm_campaign=abc">Lorem</a> 
<a href="http://www.me.com/?utm_source=email&utm_medium=email&utm_campaign=abc">ipsum</a> 
<a href="http://www.me.com/?utm_source=email&utm_medium=email&utm_campaign=abc#section-2">dolor</a> 
<a href="http://www.me.com/path-to-somewhere/file.php?utm_source=email&utm_medium=email&utm_campaign=abc">sit</a> 
<a href="http://www.me.com/?utm_source=email&utm_medium=email&utm_campaign=abc">amet</a> 
<a href="http://www.me.com/?foo=bar&utm_source=email&utm_medium=email&utm_campaign=abc">consectetur</a> 
<a href="http://www.me.com/?foo=bar&bar=foo&utm_source=email&utm_medium=email&utm_campaign=abc">consectetur</a> 
<a href="http://www.NOTME.com?utm_source=email&utm_medium=email&utm_campaign=abc">existing utm params</a> 
<a href="http://user:password@www.me.com/?foo=bar&utm_source=email&utm_medium=email&utm_campaign=abc#section-3">elit</a> 
<a href="http://user:@www.me.com/?foo=bar&utm_source=email&utm_medium=email&utm_campaign=abc#section-3">elit</a> 
<a href="http://user@www.me.com?foo=bar&utm_source=email&utm_medium=email&utm_campaign=abc#section-3">elit</a> 

正如你可以看到，我的代码适用于在HTML中所有链接（不只是me.com）如果

代码是在跟踪的网址测试你想在parse_url()之后过滤主机名取消注释行。