srcmini给定项目列表, 任务是使用PHP从选择框中检索多个选择的值。
在HTML中使用Multiple属性从下拉列表中选择多个值。在HTML中选择多个值取决于操作系统和浏览器。
- 对于窗口用户–按住+ CTRL键选择多个选项
- 对于Mac用户-按住Command键可选择多个选项
例子：本示例使用HTML创建项目列表。
<html>
<body>
<form method = "post" action = "name.php">
<h4>SELECT SUJECTS</h4>
<!--Using multiple to select multiple value-->
<select name = "subject" multiple size = 6>
<option value = "english">ENGLISH</option>
<option value = "maths">MATHS</option>
<option value = "computer">COMPUTER</option>
<option value = "physics">PHYSICS</option>
<option value = "chemistry">CHEMISTRY</option>
<option value = "hindi">HINDI</option>
</select>
<input type = "submit" name = "submit" value = Submit>
</form>
</body>
</html>现在, 任务是从列表中检索或打印多个选定的值。使用表单方法和循环来检索PHP中的选定值。
例子：
<html>
<body>
<!--name.php to be called on form submission-->
<form method = 'post'>
<h4>SELECT SUJECTS</h4>
<select name = 'subject[]' multiple size = 6>
<option value = 'english'>ENGLISH</option>
<option value = 'maths'>MATHS</option>
<option value = 'computer'>COMPUTER</option>
<option value = 'physics'>PHYSICS</option>
<option value = 'chemistry'>CHEMISTRY</option>
<option value = 'hindi'>HINDI</option>
</select>
<input type = 'submit' name = 'submit' value = Submit>
</form>
</body>
</html>
<?php
//Check if form is submitted successfully
if (isset( $_POST [ "submit" ]))
{
//Check if any option is selected
if (isset( $_POST [ "subject" ]))
{
//Retrieving each selected option
foreach ( $_POST [ 'subject' ] as $subject )
print "You selected $subject<br/>" ;
}
else
echo "Select an option first !!" ;
}
?>输出如下：
注意：该表格可以使用$ _GET方法。这取决于form方法=”?”值。
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