php if语句判定my查询是否为空
<?php header("Content-type: text/html; charset=utf-8"); $username=$_GET['username']; $psw=$_GET['password']; $phone=$_GET['phone']; include("../ini/inid.php"); $select_admin=mysql_query(" select count(*) c from ofuseradmin where phone='".$phone."' ");//判定是否为空 while($sa = mysql_fetch_array($select_admin)){ if ($sa['c']=='0'){ mysql_query("INSERT INTO ofuseradmin (username,password,phone) VALUES ('".$username."','".md5($psw)."','".$phone."')"); $aid=mysql_query("select * from ofuseradmin where phone='".$phone."'"); while($aids = mysql_fetch_array($aid)){ //echo $aids['aid']; //echo "<br>"; echo "<input type='text' value='".$aids['aid']."' id='pid' name='aid'>"; } }//添加语句 else{ //echo "此组合已经存在!"; echo"<script>alert('此手机号已经存在!');history.go(-1);</script>"; } //include("../ini/inid.php"); } ?>