本文實例講述了PHP自定義函數(shù)獲取搜索引擎來源關(guān)鍵字的方法。分享給大家供大家參考，具體如下：
獲取搜索引擎來源關(guān)鍵字的函數(shù)：
function getKeywords() {
// 搜索引擎關(guān)鍵字映射
static $host_keyword_map = array(
'www.baidu.com' => 'wd',
'v.baidu.com' => 'word',
'image.baidu.com' => 'word',
'news.baidu.com' => 'word',
'www.so.com' => 'q',
'video.so.com' => 'q',
'image.so.com' => 'q',
'news.so.com' => 'q',
'www.sogou.com' => 'query',
'pic.sogou.com' => 'query',
'v.sogou.com' => 'query',
);
// 檢查來源是否搜索引擎
if (!isset($_SERVER['HTTP_REFERER'])) {
return '';
}
$urls = parse_url($_SERVER['HTTP_REFERER']);
if (!array_key_exists($urls['host'], $host_keyword_map)) {
return '';
}
$key = $host_keyword_map[$urls['host']];
// 檢查關(guān)鍵字參數(shù)是否存在
if (!isset($urls['query'])) {
return '';
}
$params = array();
parse_str($urls['query'], $params);
if (!isset($params[$key])) {
return '';
}
$keywords = $params[$key];
// 檢查編碼
$encoding = mb_detect_encoding($keywords, 'utf-8,gbk');
if ($encoding != 'utf-8') {
$keywords = iconv($encoding, 'utf-8', $keywords);
}
return $keywords;
}
函數(shù)測試：
<?php
header("Content-Type: text/html; charset=utf-8");
$referers = array(
'http://www.baidu.com/s?cl=3&wd=%B9%E9%C0%B4&fr=vid1000',
'http://www.baidu.com/s?tn=92506501_hao_pg&rtt=1&bsst=1&wd=%B9%E9%C0%B4',
'http://www.baidu.com/link?url=ctBhF7AAau6LwE61pJOEH-ZhgUM7D3YHYMrm6xIXJlDQtMXCiea7gg49s90Q-Qh8wHD8Ano-dPNhUawBBNEEwEbtu8toMF5k1V7Xy850EtlpZyMcS0e_y-SCJp86iM6e&wd=%E5%BD%92%E6%9D%A5&tn=baidu&ie=utf-8&inputT=2980',
'http://www.baidu.com/link?url=TIn9NR6fwiy6IwwkCcVF8HhHoxVUpHQsyj1YdlQPy2roXKTnSQS_3UxwvyjZ2JPkpxF8-diSoRCSpODUM_jq2K&wd=%E5%BD%92%E6%9D%A5&tn=baidu&ie=utf-8&input',
'http://news.baidu.com/ns?cl=2&rn=20&tn=news&word=%E5%BD%92%E6%9D%A5&ie=utf-8',
'http://pic02.newdu.com/uploads/202504/02/tuxing_v22744.html 'http://v.baidu.com/v?ct=301989888&s=25&ie=utf-8&word=%E5%BD%92%E6%9D%A5',
'http://www.so.com/s?ie=utf-8&shb=1&src=360sou_newhome&q=%E5%BD%92%E6%9D%A5',
'http://video.so.com/v?q=%E5%BD%92%E6%9D%A5&src=tab_www',
'http://image.so.com/v?q=%E5%BD%92%E6%9D%A5&src=tab_video&fromurl=http%3A%2F%2Fndent.oeeee.com%2Fhtml%2F201309%2F16%2F258899.html',
'http://news.so.com/ns?q=%E5%BD%92%E6%9D%A5&src=tab_video',
'http://www.sogou.com/web?query=%E5%BD%92%E6%9D%A5&_asf=www.sogou.com&_ast=1402284372&w=01019900&p=40040100&ie=utf8&sut=6558&sst0=1402284372272&lkt=0%2C0%2C0',
'http://www.sogou.com/web?query=%E5%BD%92%E6%9D%A5&_asf=www.sogou.com&_ast=1402284372&w=01019900&p=40040100&ie=utf8&sut=6558&sst0=1402284372272&lkt=0%2C0%2C0',
'http://pic.sogou.com/d?query=%B9%E9%C0%B4&mood=0&picformat=0&mode=1&di=0&w=03021800&dr=1&did=1',
'http://v.sogou.com/v?query=%B9%E9%C0%B4&p=&w=',
'http://www.baidu.com/s?aaa=bbb',
'http://www.baidu.com/',
'http://www.jb51.net/',
);
foreach ($referers as $r) {
$_SERVER['HTTP_REFERER'] = $r;
echo getKeywords(), "\n";
}
希望本文所述對大家PHP程序設(shè)計有所幫助。