一旦检测到 url,你可以使用parse_url() 和parse_str() 来详细说明 url,添加 utm 和 medium 并重建它,而无需过多关心 get 参数的内容或 hash:
$url_modifier_domain = preg_quote('add-link.com');
$html_text = preg_replace_callback(
'#((?:https?:)?//'.$url_modifier_domain.'(/[^\'"\#]*)?)(?=[\'"\#])#i',
function ($matches) {
$link = $matches[0];
if (strpos($link, '#') !== false) {
list($link, $hash) = explode('#', $link);
}
$res = parse_url($link);
$result = '';
if (isset($res['scheme'])) {
$result .= $res['scheme'].'://';
}
if (isset($res['host'])) {
$result .= $res['host'];
}
if (isset($res['path'])) {
$result .= $res['path'];
}
if (isset($res['query'])) {
parse_str($res['query'], $res['query']);
} else {
$res['query'] = [];
}
$res['query']['utm'] = 'some';
$res['query']['medium'] = 'stuff';
if (count($res['query']) > 0) {
$result .= '?'.http_build_query($res['query']);
}
if (isset($hash)) {
$result .= '#'.$hash;
}
return $result;
},
$html
);
如你所见,代码更长但更简单
编辑
我做了一些更改,在文本中搜索每个 href="xxx"。如果链接不是来自 add-link.com 脚本将跳过它,否则他会尝试以最好的方式打印它
$html = 'blabla <a href="http://add-link.com/">a</a>
<a href="http://add-link.com/">a</a>
<a href="http://add-link.com/#hashed">a</a>
<a href="http://abcd.com/#hashed">a</a>
<a href="http://add-link.com/?test=1">a</a>
<a href="http://add-link.com/try.php">a</a>
<a href="http://add-link.com/try.php?test=1">a</a>
<a href="http://add-link.com/try.php#hashed">a</a>
<a href="http://add-link.com/try.php?test=1#hashed">a</a>
<a href="http://add-link.com/try.php?test=1#hashed">a</a>
<a href="//add-link.com?test=test" style="color: rgb(198, 156, 109);">a</a>
';
$url_modifier_domain = preg_quote('add-link.com');
$html_text = preg_replace_callback(
'/href="([^"]+)"/i',
function ($matches) {
$link = $matches[1];
// ignoring outer links
if(strpos($link,'add-link.com') === false) return 'href="'.$link.'"';
if (strpos($link, '#') !== false) {
list($link, $hash) = explode('#', $link);
}
$res = parse_url($link);
$result = '';
if (isset($res['scheme'])) {
$result .= $res['scheme'].'://';
} else if(isset($res['host'])) {
$result .= '//';
}
if (isset($res['host'])) {
$result .= $res['host'];
}
if (isset($res['path'])) {
$result .= $res['path'];
} else {
$result .= '/';
}
if (isset($res['query'])) {
parse_str($res['query'], $res['query']);
} else {
$res['query'] = [];
}
$res['query']['utm'] = 'some';
$res['query']['medium'] = 'stuff';
if (count($res['query']) > 0) {
$result .= '?'.http_build_query($res['query']);
}
if (isset($hash)) {
$result .= '#'.$hash;
}
return 'href="'.$result.'"';
},
$html
);
var_dump($html_text);