<table cellspacing="0" cellpadding="0"><tr><td class="t_f" id="postmessage_65992"> <div class="blockcode"> <div id="code_JtV"><ol><li><?php<li> <li>function is_valid_url($url){<li> $p1 ='/(http|https|ftp)://[a-z0-9-]+(.[a-z0-9 -]+)*(:[0-9]+)?(/.*)?$/i';<li> return preg_match($p1, $url);<li>}<li> <li>function is_valid_email($email){<li> if (filter_var($email, FILTER_VALIDATE_EMAIL))<li> return true;<li> else<li> return false;<li>}<li> <li>function is_valid_ip($ip){<li> if (filter_var($ip, FILTER_VALIDATE_IP))<li> return true;<li> else<li> return false ;<li>}<li> <li>?></li></ol></div> <em onclick="copycode($('code_JtV'));">复制代</em> </div> <br> </td></tr></table> <div class="ptg mbm mtn"> メール、URL、PHP</div> <div id="comment_65992" class="cm"> </div> <div id="post_rate_div_65992"></div> <br><br>