PHP自定义函数获取搜索引擎来源关键字的方法
本文实例讲述了PHP自定义函数获取搜索引擎来源关键字的方法。分享给大家供大家参考，具体如下：
获取搜索引擎来源关键字的函数：
functiongetKeywords(){
//搜索引擎关键字映射
static$host_keyword_map=array(
'www.baidu.com'=>'wd',
'v.baidu.com'=>'word',
'image.baidu.com'=>'word',
'news.baidu.com'=>'word',
'www.so.com'=>'q',
'video.so.com'=>'q',
'image.so.com'=>'q',
'news.so.com'=>'q',
'www.sogou.com'=>'query',
'pic.sogou.com'=>'query',
'v.sogou.com'=>'query',
);
//检查来源是否搜索引擎
if(!isset($_SERVER['HTTP_REFERER'])){
return'';
}
$urls=parse_url($_SERVER['HTTP_REFERER']);
if(!array_key_exists($urls['host'],$host_keyword_map)){
return'';
}
$key=$host_keyword_map[$urls['host']];
//检查关键字参数是否存在
if(!isset($urls['query'])){
return'';
}
$params=array();
parse_str($urls['query'],$params);
if(!isset($params[$key])){
return'';
}
$keywords=$params[$key];
//检查编码
$encoding=mb_detect_encoding($keywords,'utf-8,gbk');
if($encoding!='utf-8'){
$keywords=iconv($encoding,'utf-8',$keywords);
}
return$keywords;
}
函数测试：
<?php
header("Content-Type:text/html;charset=utf-8");
$referers=array(
'http://www.baidu.com/s?cl=3&wd=%B9%E9%C0%B4&fr=vid1000',
'http://www.baidu.com/s?tn=92506501_hao_pg&rtt=1&bsst=1&wd=%B9%E9%C0%B4',
'http://www.baidu.com/link?url=ctBhF7AAau6LwE61pJOEH-ZhgUM7D3YHYMrm6xIXJlDQtMXCiea7gg49s90Q-Qh8wHD8Ano-dPNhUawBBNEEwEbtu8toMF5k1V7Xy850EtlpZyMcS0e_y-SCJp86iM6e&wd=%E5%BD%92%E6%9D%A5&tn=baidu&ie=utf-8&inputT=2980',
'http://www.baidu.com/link?url=TIn9NR6fwiy6IwwkCcVF8HhHoxVUpHQsyj1YdlQPy2roXKTnSQS_3UxwvyjZ2JPkpxF8-diSoRCSpODUM_jq2K&wd=%E5%BD%92%E6%9D%A5&tn=baidu&ie=utf-8&input',
'http://news.baidu.com/ns?cl=2&rn=20&tn=news&word=%E5%BD%92%E6%9D%A5&ie=utf-8',
'http://image.baidu.com/i?ct=503316480&z=&tn=baiduimagedetail&ipn=d&word=%E5%BD%92%E6%9D%A5&step_word=&ie=utf-8&in=17668&cl=2&lm=-1&st=&pn=6&rn=1&di=70447907090&ln=1994&fr=news&&fmq=1402285886106_R&ic=&s=&se=&sme=0&tab=&width=&height=&face=&is=&istype=&ist=&jit=&objurl=http%3A%2F%2Fpic31.nipic.com%2F20130713%2F1287761_225159187345_2.jpg',
'http://v.baidu.com/v?ct=301989888&s=25&ie=utf-8&word=%E5%BD%92%E6%9D%A5',
'http://www.so.com/s?ie=utf-8&shb=1&src=360sou_newhome&q=%E5%BD%92%E6%9D%A5',
'http://video.so.com/v?q=%E5%BD%92%E6%9D%A5&src=tab_www',
'http://image.so.com/v?q=%E5%BD%92%E6%9D%A5&src=tab_video&fromurl=http%3A%2F%2Fndent.oeeee.com%2Fhtml%2F201309%2F16%2F258899.html',
'http://news.so.com/ns?q=%E5%BD%92%E6%9D%A5&src=tab_video',
'http://www.sogou.com/web?query=%E5%BD%92%E6%9D%A5&_asf=www.sogou.com&_ast=1402284372&w=01019900&p=40040100&ie=utf8&sut=6558&sst0=1402284372272&lkt=0%2C0%2C0',
'http://www.sogou.com/web?query=%E5%BD%92%E6%9D%A5&_asf=www.sogou.com&_ast=1402284372&w=01019900&p=40040100&ie=utf8&sut=6558&sst0=1402284372272&lkt=0%2C0%2C0',
'http://pic.sogou.com/d?query=%B9%E9%C0%B4&mood=0&picformat=0&mode=1&di=0&w=03021800&dr=1&did=1',
'http://v.sogou.com/v?query=%B9%E9%C0%B4&p=&w=',
'http://www.baidu.com/s?aaa=bbb',
'http://www.baidu.com/',
'https://www.nhooo.com/',
);
foreach($referersas$r){
$_SERVER['HTTP_REFERER']=$r;
echogetKeywords(),"\n";
}
搜索引擎占有比率：
http://engine.data.cnzz.com/
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