[英]How can I save a DropDown into a Database with AJAX
我已经非常努力地研究了这个问题,但是我无法理解使用PHP的AJAX。
这就是我所拥有的,当用户单击下拉列表时,我希望将其保存到数据库中
<select>
<?php $taskStatus = "SELECT * FROM task_status WHERE used = 1 ORDER BY id ASC ";
$taskresults = $conn->query($taskStatus) or die(mysqli_error($conn));
while($taskStatusRow = mysqli_fetch_assoc($taskresults)) {
echo " <option value= ". $taskStatusRow['name'] ." >". $taskStatusRow['name'] ." </option>";
}
?>
</select>
这是我想运行的查询:
INSERT INTO snagging (taskstatus, updated_at)
WHERE ID = 1234
VALUES taskStatusRow['name'], $now);
在这里,我将为您提供AJAX的总体流程。 我试图提供评论以显示控制流。
<select id="selectOption"> //******* Assign an ID
<?php $taskStatus = "SELECT * FROM task_status WHERE used = 1 ORDER BY id ASC ";
$taskresults = $conn->query($taskStatus) or die(mysqli_error($conn));
while($taskStatusRow = mysqli_fetch_assoc($taskresults)) {
echo " <option value= ". $taskStatusRow['name'] ." >". $taskStatusRow['name'] ." </option>";
}
?>
</select>
jQuery + AJAX
$(document).ready(function() {
$("#selectOption").change(function(){ //** on selecting an option based on ID you assigned
var optionVal = $("#selectOption option:selected").val(); //** get the selected option's value
$.ajax({
type: "POST", //**how data is send
url: "MYPROCESSPAGE.php", //** where to send the option data so that it can be saved in DB
data: {optionVal: optionVal }, //** send the selected option's value to above page
dataType: "json",
success: function(data){
//** what should do after value is saved to DB and returned from above URL page.
}
});
});
});
在MYPROCESSPAGE.php
,您可以访问通过AJAX传递的数据,例如:
<?php
$selectedOptionVal = $_POST['optionVal'];
//DB CONNECTION STEPS
.
.
.
// You are trying to "UPDATE" a table data based on some ID and not inserting. Included both operations
// If you are INSERTING A new table entry, use below code.
//INSERT INTO snagging (taskstatus, updated_at) VALUES ('$selectedOptionVal', 'Now()');
// If you are UPDATING an existing table entry, use below code.
//UPDATE snagging SET taskstatus = '$selectedOptionVal', updated_at = 'Now()' WHERE ID = 1234;
?>
希望对您有所帮助。
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