<?php
$link= mysql_connect("localhost","root","root")or die("数据库连接失败".mysql_error());
mysql_select_db("student",$link);
mysql_query("set names gb2312");
?>
<?php
$sql=mysql_query("select * ftom tb_student");
$info=mysql_fetch_array("$sql");
if($_POST[submit]=="查询")
{
$tex_book=$_POST[tex_book];
$sql=mysql_query("select * ftom tb_student where sno like '%''.trim($tex_book).''%'");
$info=mysql_fetch_array($sql);
}
?>
<?php
$link= mysql_connect("localhost","root","root")or die("数据库连接失败".mysql_error());
mysql_select_db("student",$link);
mysql_query("set names gb2312");
?>
<?php
$sql=mysql_query("select * ftom tb_student");
$info=mysql_fetch_array("$sql");
if($_POST[submit]=="查询")
{
$tex_book=$_POST[tex_book];
$sql=mysql_query("select * ftom tb_student where sno like '%''.trim($tex_book).''%'");
$info=mysql_fetch_array($sql);
}
?>
<?php
=>
$info=mysql_fetch_array($sql);这里不要加引号。
另外确保select * ftom tb_student这条sql能成功执行。
header("content-type:text/html;charset=gbk"); //行首加上这句试试$sql=mysql_query("select * from tb_student where sno like '%".trim($tex_book)."%'");