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php中正则获取url函数preg_match

Jun 13, 2016 am 10:03 AM
match php url under function use Example regular Obtain

下面利用preg_match举了两个实例一个是获取指定区域内容,一个是获取内容中的url地址。

下面利用preg_match举了两个实例一个是获取指定区域内容,一个是获取内容中的url地址。
*/
$string="example:

this is a test
";   //定义字符串
$pattern="|]+>(.*)[^>]+>|u";        //定义正则表达式模式
/*该匹配模式的意义是:以""的字符加上结尾内容;子模式中的".*"表示0到多个任意字符,再加上以""的字符加上">"符号。*/
preg_match_all($pattern,$string,$out,preg_pattern_order);  //进行preg_mathc_all处理
echo $out[0][0]; 
echo ",";
echo $out[0][1];
echo "

";
echo $out[1][0];
echo ",";
echo $out[1][1];

//实例二

//以下代码用于提取域名
$http="http://www.bKjia.c0m";       //定义网址
preg_match("/^(http://)?([^/]+)/i",$http,$matches);     //进行正则表达式匹配
$host=$matches[2];           //把结果数组元素赋值到变量
preg_match("/[^./]+.[^./]+$/",$host,$matches);     //进行正则表达式匹配
echo "domain name is:{$matches[0]}n";       //输出结果域名

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