获取列表使用foreach在javascript里面php codeigniter [英] getting list using foreach in javascript inside php codeigniter

问题描述

我有一个JS函数在我的PHP视图文件。我想做的是当函数验证输入在数据库中不存在时启用按钮。所以这里是我的函数：

I have a JS function inside my PHP view file. What I want to do is enable a button when the function verifies that the input does not exist in the database. So here's my function:

var name = 0; 
$("#edit-name").on("change", edit_name);

function edit_name() {
    if ($('#edit-name').val()== ""){
        $('#edit-name').addClass('required');
        $('#warning').html('Please fill required input.');
        name = 0;
    }

    else {
        <?php foreach ($name_list as $list) { ?>
            if ($('#edit-name').val() == '<?php echo $list->name ?>') {
                name = 0;
                $('#warning').html('Name already exists');
            }

            else {
                $('#warning').html('');
                name = 1;
            }
        <?php } ?>
    }

    enableButton();
}

function enableButton(){
    if (name == 1)
        document.getElementById('edit-btn').disabled = false;
    else
        document.getElementById('edit-btn').disabled = true;
}

我不知道有什么问题，正确，我的代码不能正常工作：它检查是否有输入时工作。但是即使我输入一个新的名字，按钮也不会发生什么。在输入现有名称时，不会出现警告。

I don't know what's wrong but even if the inputs are correct, my code is not working properly: It works when it checks if there is an input or not. But nothing happens to the button even if I input a new name. When I input an existing name, the warning doesn't appear.

推荐答案

查看您生成的HTML代码看你的错误。

Look at your HTML-Code that is generated than you see your mistake.

如果你有一个Array [name=>test]，[name=>test2生成以下HTML：

If you have for example a Array ["name" => "test"], ["name" => "test2"] than you view generates the following HTML:

        if ($('#edit-name').val() == 'test') {
            name = 0;
            $('#warning').html('Name already exists');
        }

        else {
            $('#warning').html('');
            name = 1;
        }


        if ($('#edit-name').val() == 'test1') {
            name = 0;
            $('#warning').html('Name already exists');
        }

        else {
            $('#warning').html('');
            name = 1;
        }

您看到else总是为真。

You see "else" is always true.

您需要写：

 <? 
 $stringarray = "";

 foreach($name_list as $list){
   $stringarray .= '"'.$list->name.'",';
 }

 // Del last ,
 $stringarray = substr($stringarray,0,-1);
 ?>

 var names = [<?php echo $stringarray;?>];
 if (names.indexOf($('#edit-name').val()) != -1) {
            name = 0;
            $('#warning').html('Name already exists');
        }else {
            $('#warning').html('');
            name = 1;
        }

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