使用 php 获取多个复选框名称/id [英] getting multiple checkboxes names/id's with php
问题描述
如何使用 PHP 在提交时获取多个选定复选框的名称或 ID?以下是示例表格.谢谢.
How can i get the names or id's of the multiple selected checkboxes on submit, using the PHP? Following is example form. Thanks.
<form action="<?php echo $_SERVER['PHP_SELF']; ?>" method="post">
<input type="checkbox" name="orange" id="orange">
<input type="checkbox" name="apple" id="apple">
<input type="checkbox" name="sky" id="sky">
<input type="checkbox" name="sea" id="sea">
<br>
<br>
<input type="submit" name="Submit" value="Submit">
</form>
推荐答案
只有在选择复选框时,才会从表单提交复选框.更重要的是,重要的是名称属性,而不是 ID.
Checkbox values are submitted from a form only if the checkbox is selected. What's more, it's the name attribute that counts, not the ID.
PHP 中有几种处理复选框的方法:
There are several ways of handling checkboxes in PHP:
- 为所有复选框提供相同的名称,后跟一对方括号,因此整个集合被视为一个数组.在这种情况下,为每个复选框指定一个值.
- 为每个复选框指定不同的名称和值.
- 为每个复选框指定不同的名称,但没有值.
在每种情况下,您都需要检查 $_POST 数组中是否存在复选框名称.
In each case, you need to check for the existence of the checkbox name in the $_POST array.
例如:
<input type="checkbox" name="color[]" id="orange" value="orange">
<input type="checkbox" name="color[]" id="apple" value="apple">
要获取这些复选框的值:
To get the values for these checkboxes:
if (isset($_POST['color'])) {
$colors = $_POST['color'];
// $colors is an array of selected values
}
但是,如果每个复选框都有不同的名称和明确的值,如下所示:
However, if each checkbox has a different name and an explicit value like this:
<input type="checkbox" name="orange" id="orange" value="orange">
<input type="checkbox" name="apple" id="apple" value="apple">
你仍然需要使用isset():
You still need to use isset():
if (isset($_POST['orange'])) {
// orange has been set and its value is "orange"
}
如果不设置值,默认值为"on",但除非被选中,否则不会出现在$_POST数组中,所以还是需要使用isset().
If you don't set a value, the default value is "on", but it won't be in the $_POST array unless it has been selected, so you still need to use isset().
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