<form action="<?=$_SERVER['PHP_SELF']?>" method="post">
<select name="test[]" multiple="multiple">
<option value="one">one</option>
<option value="two">two</option>
<option value="three">three</option>
<option value="four">four</option>
<option value="five">five</option>
</select>
<input type="submit" value="Send" />
</form>
<?php
$test=$_POST['test'];
if ($test){
foreach ($test as $t){echo 'You selected ',$t,'<br />';}
}
if($t=='one')
$price1=12;
if($t=='two')
$price2=2;
$total = $price1 + $price2;
echo $total;
当同时选择一和二时,我希望结果为 14。进行加法以获得 14 结果的最佳方法是什么?
您应该创建一个包含结果的变量,而不是创建价格 1、价格 2 等。
例如:
<form action="<?=$_SERVER['PHP_SELF']?>" method="post">
<select name="test[]" multiple="multiple">
<option value="one">one</option>
<option value="two">two</option>
<option value="three">three</option>
<option value="four">four</option>
<option value="five">five</option>
</select>
<input type="submit" value="Send" />
</form>
<?php
$test = isset($_POST['test']) ? $_POST['test'] : null; // we also want to check if it's set else we'll get an notice
$total = 0;
if ($test) {
foreach ($test as $t) {
echo 'You selected ',$t,'<br />';
switch ($t) {
case "one" : $total += 2; break;
case "two" : $total += 12; break;
}
}
}
echo 'Total: ' .$total;
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