我有这样的代码:
$values = array('1A', '2B', '3C', '4D', '5E');
$checked = array('1A_check', '2B_check', '3C_check', '4D_check', '5E_check');
$description = array('Description1', 'Description2', 'Description3', 'Description4', 'Description5');
for ($i=0; $i<count($values); $i++) {
$$checked[$i] = ""; //Setting this to null since this variable will be set to checked or not in the later step
$checkbox_form[] = '<input type="checkbox" name="checkbox[]" value="'. $values[$i] .'"'. $$checked[$i] .'>
'. $description[$i] .' <br />';
}
foreach ($checkbox_form as $value) { //Rending the Form
echo $value;
}
此代码呈现如下形式:
<input type="checkbox" name="checkbox[]" value="1A">
Description1 <br />
<input type="checkbox" name="checkbox[]" value="2B">
Description2 <br />
<input type="checkbox" name="checkbox[]" value="3C">
Description3 <br />
<input type="checkbox" name="checkbox[]" value="4D">
Description4 <br />
<input type="checkbox" name="checkbox[]" value="5E">
Description5 <br />
到目前为止一切顺利。我接下来要做的是,当用户从框中选择一些复选框并单击“预览”时,我希望他们转到一个页面,该页面预览了所选复选框“已选中”的表单。所以我有这样的代码来做到这一点:
//After checking what values were posted in the previous screen
$checkbox_posted = array('1A_check', '2B_check'); //Storing the posted checkboxes to this array
if (count($checkbox_posted) != 0) {
foreach ($checkbox_posted as $item) {
$$item = ' checked';
}
}
我认为以上variable variable
代码会将“已检查”值添加到表单第1行和第2行中的$1A_check
和$2B_check
变量,但它不会和复选框未检查。我认为表单应该输出如下:
<input type="checkbox" name="checkbox[]" value="1A" checked>
Description1 <br />
<input type="checkbox" name="checkbox[]" value="2B" checked>
Description2 <br />
<input type="checkbox" name="checkbox[]" value="3C">
Description3 <br />
<input type="checkbox" name="checkbox[]" value="4D">
Description4 <br />
<input type="checkbox" name="checkbox[]" value="5E">
Description5 <br />
但是它输出而不传递检查值。所以它不起作用。我做错了什么?
答案 0 :(得分:1)
做到:
index.php(例如):
<form action="page_with_previews.php" id="form_preview" method="post" >
<?php
// there render list
?>
</form>
<a id="preview" >Preview</a>
// by jQuery
<script>
$("#preview").click(function(){
e.preventDefault();
var cnt = $("#form_preview input[type=checkbox]:checked").size();
if ( count > 0 )
$("#form_preview").submit();
});
</script>
page_with_previews.php(例如):
if ( isset($_POST['checkbox']) {
foreach (array_filter($_POST['checkbox']) as $item) {
echo $item;
}
}
<强> 修改 强> 没有JS脚本
index.php(例如):
<?php
if (strtolower($_SERVER["REQUEST_METHOD"]) == "post"){
if ( isset ($_POST['checkbox']) ){
$url_data = http_build_query($_POST['checkbox']);
header('Location:page_with_previews.php?'.$url_data);
die;
}
}
?>
<form action="" id="form_preview" method="post" >
<?php
// there render list
?>
<input type="submit" value="View previews"/>
</form>
page_with_previews.php(例如):
if ( isset($_GET['checkbox']) {
foreach ($_GET['checkbox'] as $item) {
echo $item;
}
}