This section will implement the new book adding function of the book backend management system

The basic idea is to add data in the <form> form

After clicking the submit button, the added data will be added through the SQL statement INSERT INTO is added to the database

#Use a value insert for the submit button.

<td align="right" class="td_bg">
  <input type="hidden" name="action" value="insert">
  <input type="submit" name="button" id="button" value="提交" />
</td>

Use $_POST method to obtain the value. Use the SQL statement INSERT INTO to add new book information to the database.

<?php
if($_POST['action']=="insert"){
  $SQL = "INSERT INTO yx_books (name,price,uploadtime,type,total,leave_number)
          values('".$_POST['name']."','".$_POST['price']."','".$_POST['uptime']."','".$_POST['type']."','".$_POST['total']."','".$_POST['total']."')";
  $arr=mysqli_query($link,$sql);
  if ($arr){
    echo "<script language=javascript>alert('添加成功！');window.location='add.php'</script>";
  }
  else{
    echo "<script>alert('添加失敗');history.go(-1);</script>";
  }
}
?>

Of course we have to give the <from> form an onSubmit click event:

<form id="myform" name="myform" method="post" action="" onsubmit="return myform_Validator(this)">

Use the onSubmit click event to judge and add book information with <javascript> When adding each item, the information cannot be left empty.

<script type="text/javascript">
  function myform_Validator(theForm)
  {

    if (theForm.name.value == "")
    {
      alert("請(qǐng)輸入書(shū)名。");
      theForm.name.focus();
      return (false);
    }
    if (theForm.price.value == "")
    {
      alert("請(qǐng)輸入書(shū)名價(jià)格。");
      theForm.price.focus();
      return (false);
    }
    if (theForm.type.value == "")
    {
      alert("請(qǐng)輸入書(shū)名所屬類別。");
      theForm.type.focus();
      return (false);
    }
    return (true);
  }
</script>