PHP の慣用的な検証正規表現

<span style="color: #008080;"> 1</span> <span style="color: #0000ff;">function</span> isUrl(<span style="color: #800080;">$s</span><span style="color: #000000;">)  {  </span><span style="color: #008080;"> 2</span>         <span style="color: #0000ff;">return</span> <span style="color: #008080;">preg_match</span>('/^http[s]?:\/\/'.  <span style="color: #008080;"> 3</span>             '(([0-9]{1,3}\.){3}[0-9]{1,3}'. <span style="color: #008000;">//</span><span style="color: #008000;"> IP形式的URL- 199.194.52.184  </span><span style="color: #008080;"> 4</span>             '|'. <span style="color: #008000;">//</span><span style="color: #008000;"> 允许IP和DOMAIN（域名）  </span><span style="color: #008080;"> 5</span>             '([0-9a-z_!~*\'()-]+\.)*'. <span style="color: #008000;">//</span><span style="color: #008000;"> 域名- www.  </span><span style="color: #008080;"> 6</span>             '([0-9a-z][0-9a-z-]{0,61})?[0-9a-z]\.'. <span style="color: #008000;">//</span><span style="color: #008000;"> 二级域名  </span><span style="color: #008080;"> 7</span>             '[a-z]{2,6})'.  <span style="color: #008000;">//</span><span style="color: #008000;"> first level domain- .com or .museum  </span><span style="color: #008080;"> 8</span>             '(:[0-9]{1,4})?'.  <span style="color: #008000;">//</span><span style="color: #008000;"> 端口- :80  </span><span style="color: #008080;"> 9</span>             '((\/\?)|'.  <span style="color: #008000;">//</span><span style="color: #008000;"> a slash isn't required if there is no file name  </span><span style="color: #008080;">10</span>             '(\/[0-9a-zA-Z_!~\'\(\)\[\]\.;\?:@&=\+\$,%#-\/^\*\|]*)?)$/',  <span style="color: #008080;">11</span>             <span style="color: #800080;">$s</span>) == 1<span style="color: #000000;">;  </span><span style="color: #008080;">12</span>     }