Javascript 如何将动态添加的输入字段与父元素/id关联?
我使用bootstrap和jquery设计了一个用户数据库系统。问题是,无论何时按下按钮,它都会附加一个附加字段供用户输入 假设字段的第一个数组的数组名为Javascript 如何将动态添加的输入字段与父元素/id关联?,javascript,php,arrays,Javascript,Php,Arrays,我使用bootstrap和jquery设计了一个用户数据库系统。问题是,无论何时按下按钮,它都会附加一个附加字段供用户输入 假设字段的第一个数组的数组名为ref\u title[0] <pre><?php var_export($_POST); ?></pre> name="foo[a]" name="foo[b]" name="foo[bar][]" name="foo[bar][]" name="foo[bar][]" 按下“追加”按钮后,另一个具有相
ref\u title[0]
<pre><?php var_export($_POST); ?></pre>
name="foo[a]"
name="foo[b]"
name="foo[bar][]"
name="foo[bar][]"
name="foo[bar][]"
按下“追加”按钮后,另一个具有相同属性的文本字段将出现,但数组值将为ref\u title[1]
但是,在代码本身上,它将只显示ref\u title[]
。这是可以的,因为任何新字段都将继续添加到数组ref\u title[]
。我说得对吗
接下来,当单击SaveChanges按钮时,我将使用onclick=“newdata(“”)”
'drugh\u id'
是一个唯一的数字,例如1、2或3
当我检查第一个框的输入字段时
<input class="form-control" id="ref_title3" name="ref_title[]" placeholder="Reference Title" type="text">
JS:
<input type="text" class="form-control" id="ref_title<?php echo $row['drug_id'];?>" name="ref_title[]" placeholder="Reference Title">
<button type="button" onclick="newdata('<?php echo $row['drug_id']; ?>')" class="btn btn-primary" data-dismiss="modal">Save changes</button>
$(document).ready(function() {
var max_fields = 10; //maximum input boxes allowed
var wrapper = $(".input_fields_wrap"); //Fields wrapper
var add_button = $(".add_field_button"); //Add button ID
var x = 1; //initlal text box count
$(add_button).click(function(e){ //on add input button click
e.preventDefault();
if(x < max_fields){ //max input box allowed
x++; //text box increment
$(wrapper).append('<div><input type="text" class="form-control" id="ref_title<?php echo $row['drug_id'];?>" name="ref_title[]" placeholder="Reference Title"/></div>"><a href="#" class="remove_field">Remove</a></div>'); //add input box
}
});
$(wrapper).on("click",".remove_field", function(e){ //user click on remove text
e.preventDefault(); $(this).parent('div').remove(); x--;
})
});
这不完全是对你问题的回答,而是关于你能做什么的建议 先决条件:test.php test.php的输出将是 导致php构建_POST数组,如
drugs[145][add][]=drug145.1&drugs[145][add][]=drug145.2&drugs[22][add][]=drug22.1
现在,我建议您为输入控件创建如下名称:
_POST==$_POST = array(
'drugs' = >array(
'145' => array(
'add' => array(
'drug145.1',
'drug145.2'
),
'22' => array(
'add' => 'drug22.1'
)
)
);
告诉hte php脚本它应该用于药品项目,哪一个(145),它应该添加一些东西加上[],这样你就可以添加(实际上)任意数量的项目。那么一个像
<!DOCTYPE html>
<html>
<head>
<title>...</title>
<meta charset="utf-8" />
<style type="text/css">
.adddrugdesc {
margin-left: 1em;
cursor: pointer;
background-color: Cornsilk;
border: 1px solid silver;
}
</style>
</head>
<body>
<form method="post" action="test.php">
<div class="druglist">
<!-- note the drugid as an data-* attribute, see e.g. https://developer.mozilla.org/en/docs/Web/Guide/HTML/Using_data_attributes
Your php script is supposed to output this id when serving the html document
-->
<fieldset><legend data-drugid="3">Drug A</legend></fieldset>
<fieldset><legend data-drugid="7">Drug B</legend></fieldset>
<fieldset><legend data-drugid="145">Drug C</legend></fieldset>
<fieldset><legend data-drugid="22">Drug D</legend></fieldset>
</div>
<input type="submit" />
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script>
$(document).ready(function() {
var dl = $(".druglist");
// add some kind of edit/add button to each fieldset/legend
dl.find("fieldset legend").each(function(x) {
$(this).append('<span class="adddrugdesc">add description</span>');
});
// add an event handler for all edit/add buttons
dl.on('click', '.adddrugdesc', function(e) {
var me = $(this); // this will be the span element the usr clicked on
var legend = me.parent('legend'); // this will be the legend element in which the span is located
var fset = legend.parent('fieldset'); // same as with legend
var drugid = legend.data()['drugid']; // access the data-* attribute of the element via data() and pick the element "drugid"
var newinput = $('<input type="text" />');
newinput.attr("name", "drugs["+drugid+"][add][]");
fset.append(newinput);
});
});
</script>
</body>
</html>
(是的,是的,编码关闭了……)
会导致
告诉您的php脚本在项目145中添加/附加两个描述drug145.1
和drug145.2
,在项目22中添加/附加这两个描述
下面是一个使用html/javascript/jquery的示例
...
adddrugdesc{
左边距:1米;
光标:指针;
背景颜色:玉米丝;
边框:1px纯银;
}
药物A
药物B
药物C
药物D
$(文档).ready(函数(){
var dl=$(“.druglist”);
//向每个字段集/图例添加某种编辑/添加按钮
dl.find(“字段集图例”)。每个(函数(x){
$(this.append('adddescription');
});
//为所有编辑/添加按钮添加事件处理程序
dl.on('click','adddrugdesc',函数(e){
var me=$(this);//这将是usr单击的span元素
var legend=me.parent('legend');//这将是跨度所在的legend元素
var fset=legend.parent('fieldset');//与legend相同
var drugid=legend.data()['drugid'];//通过data()访问元素的data-*属性并选择元素“drugid”
var newinput=$('');
newinput.attr(“名称”、“药物[”+药物ID+“][add][]”);
fset.append(newinput);
});
});
(为了让它“可以理解”,这有点冗长。而且……这只是一个例子。有些东西可能更漂亮、更健壮等等)我如何阅读数组部分?var ref=$('#ref_title'+str).val();?在“PHP”下有一个文本,它可能是html输入元素的一部分,但不是PHP。请详细说明。确定其html sry。如果您添加一个提交按钮以允许提交表单,则条目将在PHP中作为数组
$\u POST['ref\u title']
提供。确定按钮将
name="foo[a]"
name="foo[b]"
name="foo[bar][]"
name="foo[bar][]"
name="foo[bar][]"
$_POST = array();
$_POST['foo']['a'] = 'a';
$_POST['foo']['b'] = 'b';
// $_POST['foo'][bar] = array()
$_POST['foo']['bar'][] = 'bar1';
$_POST['foo']['bar'][] = 'bar2';
$_POST['foo']['bar'][] = 'bar3';
[drugs][145][add][]
drugs[145][add][]=drug145.1&drugs[145][add][]=drug145.2&drugs[22][add][]=drug22.1
_POST==$_POST = array(
'drugs' = >array(
'145' => array(
'add' => array(
'drug145.1',
'drug145.2'
),
'22' => array(
'add' => 'drug22.1'
)
)
);
<!DOCTYPE html>
<html>
<head>
<title>...</title>
<meta charset="utf-8" />
<style type="text/css">
.adddrugdesc {
margin-left: 1em;
cursor: pointer;
background-color: Cornsilk;
border: 1px solid silver;
}
</style>
</head>
<body>
<form method="post" action="test.php">
<div class="druglist">
<!-- note the drugid as an data-* attribute, see e.g. https://developer.mozilla.org/en/docs/Web/Guide/HTML/Using_data_attributes
Your php script is supposed to output this id when serving the html document
-->
<fieldset><legend data-drugid="3">Drug A</legend></fieldset>
<fieldset><legend data-drugid="7">Drug B</legend></fieldset>
<fieldset><legend data-drugid="145">Drug C</legend></fieldset>
<fieldset><legend data-drugid="22">Drug D</legend></fieldset>
</div>
<input type="submit" />
</form>
<script src="https://ajax.googleapis.com/ajax/libs/jquery/2.2.0/jquery.min.js"></script>
<script>
$(document).ready(function() {
var dl = $(".druglist");
// add some kind of edit/add button to each fieldset/legend
dl.find("fieldset legend").each(function(x) {
$(this).append('<span class="adddrugdesc">add description</span>');
});
// add an event handler for all edit/add buttons
dl.on('click', '.adddrugdesc', function(e) {
var me = $(this); // this will be the span element the usr clicked on
var legend = me.parent('legend'); // this will be the legend element in which the span is located
var fset = legend.parent('fieldset'); // same as with legend
var drugid = legend.data()['drugid']; // access the data-* attribute of the element via data() and pick the element "drugid"
var newinput = $('<input type="text" />');
newinput.attr("name", "drugs["+drugid+"][add][]");
fset.append(newinput);
});
});
</script>
</body>
</html>