在if语句后回显消息并将其显示在下拉列表附近

时间：2015-03-05 09:51:34

标签： php echo message

我有一个if语句来检查我的Start Year下拉列表中的第一年是否小于End Year下拉列表中的年份。

enter image description here

出于这个原因，我希望每当Start Year大于End Year时，就会在它们旁边显示错误消息。

enter image description here

我该怎么做？

我的代码如下...... 

    <?php

if(isset($_POST['submit_next']))
{

    $username = $_SESSION['username'];
    $school = $_POST['school'];
    $degree = $_POST['degree'];
    $website = $_POST['website'];
    $start_date = $_POST['start_date'];
    $end_date = $_POST['end_date'];
    $start_year = $_POST['start_year'];
    $end_year = $_POST['end_year'];
    $degree_description = $_POST['degree_description'];

    if($start_year > $end_year)
            {
                echo '<script>ErrorMessage()</script>';
                $good = false;
            }
            else
            {
                $good = true;
            }
            if($good == true){

    $sqlinsert = "INSERT INTO education (username,school,degree,website,start_date,end_date,start_year,end_year,degree_description) VALUES ('$username','$school', '$degree', '$website', '$start_date','$end_date', '$start_year', '$end_year', '$degree_description')";

    if(!mysqli_query($dbcon, $sqlinsert))
    {
        die('error inserting new record');
    }
    header('Location: work_history.php');
}
}
    else if(isset($_POST['submit_new']))
{

    $username = $_SESSION['username'];
    $school = $_POST['school'];
    $degree = $_POST['degree'];
    $website = $_POST['website'];
    $start_date = $_POST['start_date'];
    $end_date = $_POST['end_date'];
    $start_year = $_POST['start_year'];
    $end_year = $_POST['end_year'];
    $degree_description = $_POST['degree_description'];

    if($start_year > $end_year)
            {
                echo 'Error Message';
                $good = false;
            }
            else
            {
                $good = true;
            }
            if($good == true){

    $sqlinsert = "INSERT INTO education (username,school,degree,website,start_date,end_date,start_year,end_year,degree_description) VALUES ('$username','$school', '$degree', '$website', '$start_date','$end_date', '$start_year', '$end_year', '$degree_description')";

    if(!mysqli_query($dbcon, $sqlinsert))
    {
        die('error inserting new record');
    }
}
}



?>
<title>CV Education Form</title>
<form method="post" action="education.php">
<input type="hidden" name="submitted" value="true" />

    <legend style="color: #F87F25; font: bold 18px Tahoma;">Education</legend>
    <br/>
    <label style="color: #01ACEE; font: bold 14px Tahoma;">School <input placeholder="University of Sheffield, Department Of Computer Science" type="text" name="school" size="40" required/> </label>
    <br /><br />
    <label style="color: #01ACEE; font: bold 14px Tahoma;">Degree <input placeholder="70" type="text" name="degree" size="20" required/> </label>
    <br /><br />
    <label style="color: #01ACEE; font: bold 14px Tahoma;">Website <input placeholder="www.sheffield.ac.uk/" type="text" size="25" name="website"/> </label>
    <br /><br />
    <label style="color: #01ACEE; font: bold 14px Tahoma;">Start Date</label>
        <select name="start_date">
        <option value="January">January</option>
        <option value="February">February</option>
        <option value="March">March</option>
        <option value="April">April</option>
        <option value="May">May</option>
        <option value="June">June</option>
        <option value="July">July</option>
        <option value="August">August</option>
        <option value="September">September</option>
        <option value="October">October</option>
        <option value="November">Noember</option>
        <option value="December">December</option>
        </select>
    <br /><br />
    <label style="color: #01ACEE; font: bold 14px Tahoma;">End Date</label>
        <select name="end_date">
        <option value="January">January</option>
        <option value="February">February</option>
        <option value="March">March</option>
        <option value="April">April</option>
        <option value="May">May</option>
        <option value="June">June</option>
        <option value="July">July</option>
        <option value="August">August</option>
        <option value="September">September</option>
        <option value="October">October</option>
        <option value="November">Noember</option>
        <option value="December">December</option>
        </select>
    <br /><br />
        <label style="color: #01ACEE; font: bold 14px Tahoma;"> Start Year</label>
        <select name="start_year" >
        <option value="1979">1979</option>
        .
        .
        .
        .
        <option value="2021">2021</option>
        <option value="2022">2022</option>

        </select>
        <label style="color: #01ACEE; font: bold 14px Tahoma;">End Year</label>
        <select name="end_year">
        <option value="1979">1979</option>
        .
        .
        .
        .
        <option value="2021">2021</option>
        <option value="2022">2022</option>
        </select>      
    <br /><br />
<label style="color: #01ACEE; font: bold 14px Tahoma;">Degree Description</label>
    <br />
    <textarea rows="4" cols="40" name="degree_description"></textarea> </label>

<br />
<input type="submit" value="Next" name="submit_next" style="border: 1px solid #006; color:#F87F25; font: bold 16px Tahoma; border-radius:7px; padding:4px;"/>

<input type="submit" value="Add New & Save" name="submit_new" style="border: 1px solid #006; color:#F87F25; font: bold 16px Tahoma; border-radius:7px; padding:4px;"/>

<input type=button onClick="location.href='personal_information.php'" value='Previous' style="border: 1px solid #006; color:#F87F25; font: bold 16px Tahoma; border-radius:7px; padding:4px;">

<input type=button onClick="location.href='work_history.php'" value='Skip' style="border: 1px solid #006; color:#F87F25; font: bold 16px Tahoma; border-radius:7px; padding:4px;">

</form>

2 个答案:

答案 0 :(得分：0)

我个人只是使​​用javascript来检查字段并显示错误，然后在处理数据之前仅使用PHP进行双重检查。

查看javascript表单验证。

答案 1 :(得分：0)

试试这个 - 它具有以下优点：

  • 它为您节省了大量代码循环，而不是每年硬编码选项
  • 表单保留以前选择的任何值

  • 它会在选择

    之后输入您想要的任何错误消息 
    <label style="color: #01ACEE; font: bold 14px Tahoma;"> Start Year</label>
<select name="start_year" >
<?php 
for ($i = 1979; $i < 2022; $i++) {
    if ($i == $start_year) 
        $sel = 'selected="selected"';
    else 
        $sel = '';
    echo "<option value=\"$i\" $sel >$i</option>\n";
}
?>
</select>
<?php
if (!$good) echo "<span>yada, yada error message</span>\n";
?>
<label style="color: #01ACEE; font: bold 14px Tahoma;">End Year</label>
<select name="end_year">
<?php 
for ($i = 1979; $i < 2022; $i++) {
    if ($i == $end_year) 
        $sel = 'selected="selected"';
    else 
        $sel = '';
    echo "<option value=\"$i\" $sel >$i</option>\n";
}
?>
</select>      
<?php
if (!$good) echo "<span>yada, yada error message</span>\n";
?>
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