Question

我正在编写一个使用HTML选择框的计算器。但是，我的PHP代码没有正确发布选择值。有人能提供可能的见解吗？我不知道出了什么问题。您可以在此处试用计算器：http://macrorevolution.com/calculators/1-rep-max/

当我按提交时，该值被清除，没有给出结果。在我的其他计算器上，例如：http://macrorevolution.com/calculators/total-daily-energy-expenditure/，输入的值在提交后保留。

PHP代码：

<?php
$repsv = "";
$weightliftv = "";
$answer = "";
if(isset($_POST['weightliftv'])) {
    $repsv = $_POST['repsv'];
    $weightliftv = $_POST['weightliftv'];
    if ($repsv=='0');
    else if($repsv=='1v') $repsv=1;
    else if($repsv=='2v') $repsv=1.0285949393;
    else if($repsv=='3v') $repsv=1.0588733587;
    else if($repsv=='4v') $repsv=1.0909884355;
    else if($repsv=='5v') $repsv=1.1251125112;
    else if($repsv=='6v') $repsv=1.1614401858;
    else if($repsv=='7v') $repsv=1.2001920307;
    else if($repsv=='8v') $repsv=1.2416190713;
    else if($repsv=='9v') $repsv=1.2860082305;
    else if($repsv=='10v') {$repsv=1.3333333333; echo "10";}
    else echo "error";
    $answer = $weightliftv * $repsv;
}
?>

以下是同一文件中的html代码：

<form method='post' action=''>
<table width='80%' style="margin: 0 auto;">


    <tr class="spaceUnder">
        <td>Weight Lifted:</td>
        <td><input type='text' name='agev' value="<?php echo $agev; ?>"/>lbs</td>
    </tr>
    <tr class="spaceUnder">
    <td>Reps Done</td>
    <td colspan="2">
        <select name="repsv">
  <option name='repsv' selected='selected' value=''>Select</option>
  <option name='repsv' value='1v'>1 Reps</option>
  <option name='repsv' value='2v'>2 Reps</option>
  <option name='repsv' value='3v'>3 Reps</option>
  <option name='repsv' value='4v'>4 Reps</option>
  <option name='repsv' value='5v'>5 Reps</option>
  <option name='repsv' value='6v'>6 Reps</option>
  <option name='repsv' value='7v'>7 Reps</option>
  <option name='repsv' value='8v'>8 Reps</option>
  <option name='repsv' value='9v'>9 Reps</option>
  <option name='repsv' value='10v'>10 Reps</option>
         </select>
        </td>
        </tr>

    <tr class="spaceUnder">
        <td colspan="2"><input type='submit' class="button highlight small" value='Calculate'/></td>
    </tr>
    <tr class="spaceUnder">
        <td colspan="2"><strong>Your one rep max is </strong><input type='text' style="width: 50px; font-weight:bold;" value='<?php echo round($answer,0); ?>' /><strong>lbs</strong>  </td>
    </tr>

</table>
</form>

如有必要，这是完整的代码：

<?php
/*
Template Name: 1repcalc
*/
?>



<?php get_header(); ?>



<?php $al_options = get_option('al_general_settings');?>



<!-- Title -->

<div class="box pt20">

    <!-- Title -->

    <div class="headertext">

        <?php the_title() ?>

        <?php $headline = get_post_meta($post->ID, "_headline", $single = false);?>

        <?php if(!empty($headline[0]) ):?>

            <span><?php echo $headline[0] ?></span>

        <?php endif?>

    </div>

    <div class="clearsmall"></div>



    <!-- Promo text -->

    <?php $promo = get_post_meta($post->ID, "_promo", $single = false);?>

    <?php if(!empty($promo[0]) ):?>

       <div class="calloutcontainer">

            <div class="container_12">

                <div class="grid_12">            

                    <?php echo do_shortcode($promo[0]);?>

                </div>

            </div>

        </div>    

    <?php endif?>

    <div class="container_12">

        <?php if ( have_posts() ) while ( have_posts() ) : the_post(); ?>

            <?php the_content(); ?>

        <?php endwhile; ?>

    </div>

</div>
<!-- ///////////////////////////////////////////////////////////////////////////////////////////-->
<?php
$repsv = "";
$weightliftv = "";
$answer = "";
if(isset($_POST['weightliftv'])) {
    $repsv = $_POST['repsv'];
    $weightliftv = $_POST['weightliftv'];
    if ($repsv=='0');
    else if($repsv=='1v') $repsv=1;
    else if($repsv=='2v') $repsv=1.0285949393;
    else if($repsv=='3v') $repsv=1.0588733587;
    else if($repsv=='4v') $repsv=1.0909884355;
    else if($repsv=='5v') $repsv=1.1251125112;
    else if($repsv=='6v') $repsv=1.1614401858;
    else if($repsv=='7v') $repsv=1.2001920307;
    else if($repsv=='8v') $repsv=1.2416190713;
    else if($repsv=='9v') $repsv=1.2860082305;
    else if($repsv=='10v') {$repsv=1.3333333333; echo "10";}
    else echo "error";
    $answer = $weightliftv * $repsv;
    echo $answer;
}
?>


<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" >
<title>One Rep Max Calculator</title>
<style>
  table {
    font-size:15px;
    font-family: 'PT Sans', sans-serif;
    background-color:#FFFFFF;
  }
tr.spaceUnder > td
{
  padding:0em 1em 1em 0em;

}
p.ss {
    font-size:30px; 
    text-align:center
}
input {
margin-right:5px;
margin-left:5px;
}

</style>
</head>
<body>
<div class="box pt20">
<p class="ss">MacroRevolution One Rep Max Calculator</p><br>
<table width='80%' style="margin: 0 auto;">
    <tr class="spaceUnder">
    <td colspan="4">

All weight training and resistance training programs are always based off of your 1 rep max. If you are uncertain of your 1 rep max you can use the 1 rep max calculator below to help get you pretty close to that number.
In many cases we find that the 1 rep max calculator is accurate within 5%. The closer you can get to completing 1 rep at maximum effort, the more accurate it will be!
    </td>
    </tr>
</table>

<form method='post' action=''>
<table width='80%' style="margin: 0 auto;">


    <tr class="spaceUnder">
        <td>Weight Lifted:</td>
        <td><input type='text' name='agev' value="<?php echo $agev; ?>"/>lbs</td>
    </tr>
    <tr class="spaceUnder">
    <td>Reps Done</td>
    <td colspan="2">
        <select name="repsv">
  <option name='repsv' selected='selected' value=''>Select</option>
  <option name='repsv' value='1v'>1 Reps</option>
  <option name='repsv' value='2v'>2 Reps</option>
  <option name='repsv' value='3v'>3 Reps</option>
  <option name='repsv' value='4v'>4 Reps</option>
  <option name='repsv' value='5v'>5 Reps</option>
  <option name='repsv' value='6v'>6 Reps</option>
  <option name='repsv' value='7v'>7 Reps</option>
  <option name='repsv' value='8v'>8 Reps</option>
  <option name='repsv' value='9v'>9 Reps</option>
  <option name='repsv' value='10v'>10 Reps</option>
         </select>
        </td>
        </tr>

    <tr class="spaceUnder">
        <td colspan="2"><input type='submit' class="button highlight small" value='Calculate'/></td>
    </tr>
    <tr class="spaceUnder">
        <td colspan="2"><strong>Your one rep max is </strong><input type='text' style="width: 50px; font-weight:bold;" value='<?php echo round($answer,0); ?>' /><strong>lbs</strong>  </td>
    </tr>

</table>
</form>


<table border='0' width='80%' style="margin: 0 auto;">
    <td colspan="4">

      <br>
If you want to calculate your formula....
 <br><br><br>
    </td>
</table>
</div>

</body>
</html>

<!-- ///////////////////////////////////////////////////////////////////////////////////////////-->


<?php get_footer(); ?>

Answer 1

我没有看到weightliftv的输入。如果有，那么它可能是;在if之后（$ repsv =='0'）;删除它，它应该工作。

虽然有几点注意。不需要isset。 if（$ _ POST ['weightliftv']）{做同样的事情。您不需要为每个选项命名，只需命名它们所属的选项。不要忘记过滤帖子，以便它们更安全（filter_var（））。

<?php echo $var; ?> can be shortened to <?=$var;?>

否则if（$ repsv =='10v'）{$ repsv = 1.3333333333; echo“10”;}在不需要时有花括号。它们不会伤害任何东西，但它会使您的代码更加统一，更易于阅读。

可以将许多选择选项放入循环中。

for($i=1;$i<11;$i++) {
  <option name='repsv' value='1v'>1 Reps</option>
}

<?php
    $repsv = "";
    $weightliftv = "";
    $answer = "";
    if(isset($_POST['weightliftv'])) {
        $repsv = $_POST['repsv'];
        $weightliftv = $_POST['weightliftv'];
        if ($repsv=='0');
        else if($repsv=='1v') $repsv=1;
        else if($repsv=='2v') $repsv=1.0285949393;
        else if($repsv=='3v') $repsv=1.0588733587;
        else if($repsv=='4v') $repsv=1.0909884355;
        else if($repsv=='5v') $repsv=1.1251125112;
        else if($repsv=='6v') $repsv=1.1614401858;
        else if($repsv=='7v') $repsv=1.2001920307;
        else if($repsv=='8v') $repsv=1.2416190713;
        else if($repsv=='9v') $repsv=1.2860082305;
        else if($repsv=='10v') {$repsv=1.3333333333; echo "10";}
        else echo "error";
        $answer = $weightliftv * $repsv;
    }
    ?>

HTML选择无法正常工作

1 个答案: