Question

我已經創建了一個表單，它接受數據並將其插入到數據庫中。 onlick創建按鈕我希望函數檢查數據庫employee_id中的條目是否已經存在。如果存在，我希望它顯示的數據已經存在，你還是想插入，我在這可以任何人幫助我這個。形式是

<form id="myForm" name="myForm" action='insert.php' method='post' > 
    <input type='hidden' name='st' value=0> 
    <table style="text-align:center; width:100%"> 
     <tr> 
      <td style="text-align:right"><label>Select SE/AE:</label></td> 
      <td style="text-align:left"> 
       <?php include("configs.php"); 
       $sql = "SELECT DISTINCT seae FROM se_ae ";?> 
       <select name="seae"> 
        <option value="" selected></option> 
        <?php foreach ($dbo->query($sql) as $row) { ?> 
         <option value="<?php echo $row['seae']; ?>"> 
         <?php echo $row['seae']; ?></option> 
        <?php }?> 
       </select> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label>Select Brand:</label></td> 
      <td style="text-align:left"> 
       <?php //include("configs.php"); 
       $sql = "SELECT DISTINCT `brand` FROM se_ae ";?> 
       <select name="brand"> 
        <option value="" selected> </option> 
        <?php foreach ($dbo->query($sql) as $row) { ?> 
         <option value="<?php echo $row['brand']; ?>"> 
         <?php echo $row['brand']; ?></option> 
        <?php }?> 
       </select> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label>Select Territory:</label></td> 
      <td style="text-align:left"> 
       <?php //include("configs.php"); 
       $sql = "SELECT DISTINCT `territory` FROM se_ae ";?> 
       <select name="territory"> 
        <option value="" selected></option> 
        <?php foreach ($dbo->query($sql) as $row) { ?> 
         <option value="<?php echo $row['territory']; ?>"> 
         <?php echo $row['territory']; ?></option> 
        <?php }?> 
       </select> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label for="name">Employee Name:</label></td> 
      <td style="text-align:left"> 
       <input type="text" id="name" name="name"/> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label for="number">Employee ID:</label></td> 
      <td style="text-align:left"> 
       <input type="text" id="number" name="number" /> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label for="email"> Email:</label></td> 
      <td style="text-align:left"> 
       <input type="text" id="email" name="email" /> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label for="contact"> Contact:</label></td> 
      <td style="text-align:left"> 
       <input type="text" id="contact" name="contact" /> 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right"><label for="exist"> Exist:</label></td> 
      <td style="text-align:left"> 
       <input type="radio" id="exist" name="exist" value="Active"/>Active 
       <input type="radio" id="exist" name="exist" value="NA"/>NA 
      </td> 
     </tr> 
     <tr> 
      <td style="text-align:right" class='swMntTopMenu'> 
       <input style="background-color:rgb(255,213,32)" name="Reset" type="reset" value="Reset"> 
      </td> 
      <td style="text-align:left" class='swMntTopMenu'> 
       <input style="background-color:rgb(255,213,32)" name="submit" type="submit" value="Create"> 
      </td> 
     </tr> 
    </table> 
</form> 

Answer 1

您可以使用jQuery驗證

$(function() { 
$("#resturantRegistration").validate({ 
    rules: { 
      number: { 
      required: true, 
        remote:"user/checkEmployee" 
     } 
    }, 
    messages: { 
     number: { 
      required: "Please enter Employee id", 
      remote: $.validator.format("Employee id already in use") 
     } 
    } 
}); 
}); 

PHP函數

function checkEmployee(){ 
      $emailid = $_GET['number']; 
      if(!empty($emailid)){ 
       $emailRes = $this->users->is_email_available($emailid); 
       if ($emailRes == ''){       
        echo 'false'; 
       } else {    
        echo 'true'; 
       } 
      } 
     } 

型號功能檢查與數據庫

/** 
    * Check if email available for registering 
    * 
    * @param string 
    * @return bool 
    */ 
    function is_email_available($email) 
    { 
     $this->db->select('1', FALSE); 
     $this->db->where('LOWER(email)=', strtolower($email)); 
     $this->db->or_where('LOWER(new_email)=', strtolower($email)); 

     $query = $this->db->get($this->table_name); 
     return $query->num_rows() == 0; 
    } 

上面的代碼是按照codeigniter MVC framew ork你可以在覈心PHP中自定義此