php中一个好用的函数parse_url,特别方便用来做信息抓取的分析,举例子如下:
$url = "http://www.daimajiayuan.com/course/"; $parts = parse_url($url);
代码输出:
array ( [scheme] => http [host] => www.daimajiayuan.com [path] => /course )
又如:
<?php $url = 'http://username:password@hostname/path?arg=value#anchor'; print_r(parse_url($url)); echo parse_url($url, php_url_path); ?>
代码输出:
array ( [scheme] => http [host] => hostname [user] => username [pass] => password [path] => /path [query] => arg=value [fragment] => anchor )
可以看到,可以很容易分解出一个url的各个部,那如果要拿指定的部分出来的话也很容易,如又如:
echo parse_url($url, php_url_path);
就是在第二个参数中,设定如下的参数:
php_url_scheme, php_url_host, php_url_port, php_url_user, php_url_pass, php_url_path, php_url_query or php_url_fragment.
