example, establish login interface and create, delete form

Last Update:2016-10-30 Source: Internet

Author: User

Tags sql injection attack

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The following is the code for the login box

<! DOCTYPE HTML PUBLIC "-//W3C//DTD XHTML 1.0 transitional//en" "Http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd ">
Here is the PHP code for processing chuli.php
<?PHP$uid=$_post["UID"];$pwd=$_post["PWD"];//Connecting Objects$db=NewMysqli ("localhost", "root", "123", "MyDB");//Write SQL statement//sql injection attack$sql= "Select password from login where username= ' {$uid}‘";//Execute SQL statement$reslut=$db->query ($sql);$n=$reslut-Fetch_row ();if($uid! = "" &&$pwd!="" ){    if($n[0]==$pwd)    {        Header("location:main.php"); }    Else    {        Echo"The user name or password is wrong!" "; }}Else{    Echo"User name password cannot be empty";}
Here is the main page main.php
<!DOCTYPE HTML Public "-//W3C//DTD XHTML 1.0 transitional//en" "http://www.w3.org/TR/xhtml1/DTD/ Xhtml1-transitional.dtd "><HTMLxmlns= "http://www.w3.org/1999/xhtml"><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /><title>Untitled Document</title></Head><Body><Tablewidth= "100%"Border= "1"cellpadding= "0"cellspacing= "0">    <TR>        <TD>Code</TD>        <TD>Name</TD>        <TD>Gender</TD>        <TD>National</TD>        <TD>Birthday</TD>        <TD>Operation</TD>    </TR>        <?PHP//Build Connection object $db = new mysqli ("localhost", "root", "123", "MyDB");    Write SQL statement $sql = "SELECT * from Info";    Execute SQL statement $result = $db->query ($sql);        Read Data $attr = $result->fetch_all ();                foreach ($attr as $v) {echo "<tr>"; $sex = $v [2]? "                Male ":" Female ";                Query name family name by name Family Code $name = Nationname ($v [3]); echo "<td>{$v [0]}</td><td>{$v [1]}</td><td>{$sex}</td><td>{$name}</ td><td>{$v [4]}</td><td><a href= ' shanchu.php?c={$v [0]} ' onclick=\ ' return confirm (' OK to delete?                ') \ "> Delete </a></td>";        /*foreach ($v as $v 1) {echo "<td>{$v 1}</td>";    }*/echo "</tr>"; }//Give a nationality code, return national name function Nationname ($code) {//Build Connection object $db = new mysqli ("localhost", "root", "1        "," MyDB ");       Write SQL statement $sql = "SELECT name from Nation where code= ' {$code} '"; Execute SQL statement $result = $db->query ($sql);                $attr = $result->fetch_row ();    return $attr [0];         }?>        </Table><ahref= "add.php"><inputtype= "button"value= "Add Data" /></a></Body></HTML>
The following is the deletion of the shanchu.php
<?PHP$code=$_get["C"];//Connecting Objects$db=NewMysqli ("localhost", "root", "123", "MyDB");$sql= "Delete from info where code= ' {$code}‘";$r=$db->query ($sql);if($r){    Header("location:main.php");}Else{    Echo"Delete Failed";}
And then here's the added interface add.php
<!DOCTYPE HTML Public "-//W3C//DTD XHTML 1.0 transitional//en" "http://www.w3.org/TR/xhtml1/DTD/ Xhtml1-transitional.dtd "><HTMLxmlns= "http://www.w3.org/1999/xhtml"><Head><Metahttp-equiv= "Content-type"content= "text/html; charset=utf-8" /><title>Untitled Document</title></Head><Body><formAction= "addchuli.php"Method= "POST">    <Div>Code:<inputtype= "text"name= "Code" /></Div>    <Div>Name:<inputtype= "text"name= "Name" /></Div>    <Div>Gender:<inputtype= "Radio"name= "Sex"value= "1"checked= "Checked" />male&nbsp;    <inputtype= "Radio"name= "Sex"value= "0" />female</Div>    <Div>Ethnicity:<Selectname= "Nation">        <?PHP//Build Connection object $db = new mysqli ("localhost", "root", "123", "MyDB");        $sql = "SELECT * From Nation";        $result = $db->query ($sql);                $attr = $result->fetch_all ();        foreach ($attr as $v) {echo "<option value= ' {$v [0]} ' >{$v [1]}</option>"; }        ?>    </Select>    </Div>    <Div>Birthday:<inputtype= "text"name= "Birthday" /></Div>        <Div><inputtype= "Submit"value= "Add" /></Div></form></Body></HTML>
Here is the added PHP code addchuli.php
<?PHP$code=$_post["Code"];$name=$_post["Name"];$sex=$_post["Sex"];$nation=$_post["Nation"];$birthday=$_post["Birthday"];//Connecting Objects$db=NewMysqli ("localhost", "root", "123", "MyDB");$sql= "INSERT into info values (' {$code}‘,‘{$name}‘,{$sex},‘{$nation}‘,‘{$birthday}‘)";$db->query ($sql);Header("location:main.php");
example, establish login interface and create, delete form

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