在 onClick HTML 事件之后调用 PHP 函数 [英] Call a PHP function after onClick HTML event
问题描述
目的:调用 PHP 函数从文件中读取数据并重写它.我仅将 PHP 用于此目的 - FileIO - 我是 PHP 新手.
Purpose: Call a PHP function to read data from a file and rewrite it. I used PHP only for this purpose - FileIO - and I'm new to PHP.
解决方案?我尝试了很多论坛，知道我们无法正常实现:onClick事件>调用函数.我们该怎么做，还有其他方法吗，尤其是在我的情况下?我的 HTML 代码和 PHP 代码在同一页面上:Admin.php.这是 HTML 部分:
Solution? I tried through many forums and knew that we cannot achieve it normal way: onClick event > call function. How can we do it, are there other ways, particularly in my case? My HTML code and PHP code is on the same page: Admin.php. This is HTML part:
<form>
<fieldset>
<legend>Add New Contact</legend>
<input type="text" name="fullname" placeholder="First name and last name" required /> <br />
<input type="email" name="email" placeholder="etc@company.com" required /> <br />
<input type="text" name="phone" placeholder="Personal phone number: mobile, home phone etc." required /> <br />
<input type="submit" name="submit" class="button" value="Add Contact" onClick="" />
<input type="button" name="cancel" class="button" value="Reset" />
</fieldset>
</form>
这是 PHP 部分:
function saveContact()
{
$datafile = fopen ("data/data.json", "a+");
if(!$datafile){
echo "<script>alert('Data not existed!')</script>";
}
else{
...
$contact_list = $contact_list . addNewContact();
...
file_put_contents("data/data.json", $contact_list);
}
fclose($datafile);
}
function addNewContact()
{
$new = '{';
$new = $new . '"fullname":"' . $_GET['fullname'] . '",';
$new = $new . '"email":"' . $_GET['email'] . '",';
$new = $new . '"phone":"' . $_GET['phone'] . '",';
$new = $new . '}';
return $new;
}
看看这些代码，当人们点击添加联系人按钮时，我想调用 saveContact.如果需要，我们可以重新加载页面.仅供参考，我也在页面中使用 JQuery、HTML5.谢谢，
Have a look at these code, I want to call saveContact when people click on Add Contact button. We can reload page if need so. FYI, I use JQuery, HTML5 in page as well. Thanks,
推荐答案
有两种方法.第一种是使用典型的表单提交来完全刷新页面
There are two ways. the first is to completely refresh the page using typical form submission
//your_page.php
<?php
$saveSuccess = null;
$saveMessage = null;
if($_SERVER['REQUEST_METHOD'] == 'POST') {
// if form has been posted process data
// you dont need the addContact function you jsut need to put it in a new array
// and it doesnt make sense in this context so jsut do it here
// then used json_decode and json_decode to read/save your json in
// saveContact()
$data = array(
'fullname' = $_POST['fullname'],
'email' => $_POST['email'],
'phone' => $_POST['phone']
);
// always return true if you save the contact data ok or false if it fails
if(($saveSuccess = saveContact($data)) {
$saveMessage = 'Your submission has been saved!';
} else {
$saveMessage = 'There was a problem saving your submission.';
}
}
?>
<!-- your other html -->
<?php if($saveSuccess !== null): ?>
<p class="flash_message"><?php echo $saveMessage ?></p>
<?php endif; ?>
<form action="your_page.php" method="post">
<fieldset>
<legend>Add New Contact</legend>
<input type="text" name="fullname" placeholder="First name and last name" required /> <br />
<input type="email" name="email" placeholder="etc@company.com" required /> <br />
<input type="text" name="phone" placeholder="Personal phone number: mobile, home phone etc." required /> <br />
<input type="submit" name="submit" class="button" value="Add Contact" onClick="" />
<input type="button" name="cancel" class="button" value="Reset" />
</fieldset>
</form>
<!-- the rest of your HTML -->
第二种方法是使用 AJAX.为此，您需要将表单处理完全分离到一个单独的文件中:
The second way would be to use AJAX. to do that youll want to completely seprate the form processing into a separate file:
//进程.php
$response = array();
if($_SERVER['REQUEST_METHOD'] == 'POST') {
// if form has been posted process data
// you dont need the addContact function you jsut need to put it in a new array
// and it doesnt make sense in this context so jsut do it here
// then used json_decode and json_decode to read/save your json in
// saveContact()
$data = array(
'fullname' => $_POST['fullname'],
'email' => $_POST['email'],
'phone' => $_POST['phone']
);
// always return true if you save the contact data ok or false if it fails
$response['status'] = saveContact($data) ? 'success' : 'error';
$response['message'] = $response['status']
? 'Your submission has been saved!'
: 'There was a problem saving your submission.';
header('Content-type: application/json');
echo json_encode($response);
exit;
}
?>
然后在你的 html/js 中
And then in your html/js
<form id="add_contact" action="process.php" method="post">
<fieldset>
<legend>Add New Contact</legend>
<input type="text" name="fullname" placeholder="First name and last name" required /> <br />
<input type="email" name="email" placeholder="etc@company.com" required /> <br />
<input type="text" name="phone" placeholder="Personal phone number: mobile, home phone etc." required /> <br />
<input id="add_contact_submit" type="submit" name="submit" class="button" value="Add Contact" onClick="" />
<input type="button" name="cancel" class="button" value="Reset" />
</fieldset>
</form>
<script type="text/javascript">
$(function(){
$('#add_contact_submit').click(function(e){
e.preventDefault();
$form = $(this).closest('form');
// if you need to then wrap this ajax call in conditional logic
$.ajax({
url: $form.attr('action'),
type: $form.attr('method'),
dataType: 'json',
success: function(responseJson) {
$form.before("<p>"+responseJson.message+"</p>");
},
error: function() {
$form.before("<p>There was an error processing your request.</p>");
}
});
});
});
</script>
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