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PHP, ??? ? ?? ?? ??? ???? ?? ?? ??

?? ???? ??? ???? ?? ???? ??????

? ???? ? ??? ?????

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<?? ?? = ??>? onClick ???? ???? ???.

??????? ???? ?? ????? ????, ? ????, ? ???? ??? ??? ? ????. ? ????? ?? ????? ???? ???.

<script type="text/javascript">
  function checkspace(checkstr) {
    var str = '';
    for(i = 0; i < checkstr.length; i++) {
      str = str + ' ';
    }
    return (str == checkstr);
  }
  function check()
  {
    if(checkspace(document.renpassword.password.value)) {
      document.renpassword.password.focus();
      alert("原密碼不能為空!");
      return false;
    }
    if(checkspace(document.renpassword.password1.value)) {
      document.renpassword.password1.focus();
      alert("新密碼不能為空!");
      return false;
    }
    if(checkspace(document.renpassword.password2.value)) {
      document.renpassword.password2.focus();
      alert("確認(rèn)密碼不能為空!");
      return false;
    }
    if(document.renpassword.password1.value != document.renpassword.password2.value) {
      document.renpassword.password1.focus();
      document.renpassword.password1.value = '';
      document.renpassword.password2.value = '';
      alert("新密碼和確認(rèn)密碼不相同,請重新輸入");
      return false;
    }
    document.admininfo.submit();
  }
</script>

?????? SQL ?? ???? ??? ?? ????? ??? ??? ??? ????? ????? ?????.

??? ???? SQL ?? ?? ??? ???? ??????? ????? ?????

?? ?? ? ????? ?????. ? ????? ???? ?? ??????.

<?php
$password=$_SESSION["pwd"];
$sql="select * from admin where password='$password'";
$rs=mysqli_query($link,$sql);
$rows=mysqli_fetch_assoc($rs);
$submit = isset($_POST["Submit"])?$_POST["Submit"]:"";
if($submit)
{
  if($rows["password"]==$_POST["password"])
  {
    $password2=$_POST["password2"];
    $sql="update admin set password='$password2' where id=1";
    mysqli_query($link,$sql);
    echo "<script>alert('修改成功,請重新進(jìn)行登陸!');window.location='login.php'</script>";
    exit();
  }
  else
    ?>
    <?php
  {
    ?>
    <script>
      alert("原始密碼不正確,請重新輸入")
      location.href="renpassword.php";
    </script>
    <?php
  }
}
?>


???? ??
||
<script type="text/javascript"> function checkspace(checkstr) { var str = ''; for(i = 0; i < checkstr.length; i++) { str = str + ' '; } return (str == checkstr); } function check() { if(checkspace(document.renpassword.password.value)) { document.renpassword.password.focus(); alert("原密碼不能為空!"); return false; } if(checkspace(document.renpassword.password1.value)) { document.renpassword.password1.focus(); alert("新密碼不能為空!"); return false; } if(checkspace(document.renpassword.password2.value)) { document.renpassword.password2.focus(); alert("確認(rèn)密碼不能為空!"); return false; } if(document.renpassword.password1.value != document.renpassword.password2.value) { document.renpassword.password1.focus(); document.renpassword.password1.value = ''; document.renpassword.password2.value = ''; alert("新密碼和確認(rèn)密碼不相同,請重新輸入"); return false; } document.admininfo.submit(); } </script>