I currently have code which will pull the first element from a database record and print it in an output box.
What is the easiest way to print the rest of the elements of that record to the other relevant output boxes?
My PHP file takes an 'id' specified by the user.
$id = $_POST['id'];
$query = "SELECT * FROM Customers WHERE ID = $id";
$result= mysql_query($query);
if (mysql_num_rows($result) > 0) {
while($row = mysql_fetch_row($result)) {
echo $row[1];
}
}
And this is the code in the HTML file
jQuery(document).ready(function(){
jQuery("input.myid").keyup(function(e){
e.preventDefault();
ajax_search();
});
});
function ajax_search(){
var search_val=jQuery("input.myid").val();
jQuery.post("find.php", {id : search_val}, function(data){
if (data.length>0){
jQuery("input.fname").val(data);
}
});
}
The code takes the id ('myid') and prints to a text box named 'fname'.
I find it easier to json_encode the whole thing (record I mean) and use something like jquery.populate which basically takes an object and fills a form with it (all fields it can find which names' match properties from the object).
I hope this makes sense.
Related
I am running a POST + json code to collect data from database, all results come with only one value (this is correct), however there is only one column which should show more than one value but shows only the first one. What I need to change in my code to get this list instead of the first row result?
I've run one MYSQL query linking three databases those share the same id PCRNo, the first two databases tPCR and tcomplement should only have one result and the third one should receive more results due to we can have more lines with the same id.
This is my JavaScript
<script>
$(document).ready(function(){
$('#table').on('click', '.fetch_data', function(){
var pcr_number = $(this).attr('id');
$.ajax({
url:'fetch.php',
method:'post',
data:{pcr_number:pcr_number},
dataType:"json",
success:function(data){
$('#PCR').val(data.PCRNo);
$('#PCC').val(data.PCC);
$('#PCR_Creation').val(data.Creation_Date);
$('#PCR_Status').val(data.Stage);
$('#Required_Completion').val(data.Required_Completion);
$('#description').val(data.Name);
$('#Comments').val(data.Comments);
$('#originator').val(data.Creator);
$('#change_type').val(data.Category);
$('#product_type').val(data.Product);
$('#req_dept').val(data.Department);
$('#flow').val(data.Flow_Start_Date);
$('#own').val(data.Owning_Site);
$('#impacted').val(data.Impacted_Site);
$('#approval').val(data.Meeting_Status);
$('#review').val(data.Review_Date);
$('#cat').val(data.Cat);
$('#cost').val(data.Cost);
$('#labor').val(data.Labour);
$('#volume').val(data.Volume);
$('#request').val(data.Request);
$('#justification').val(data.Justification);
$('#PCNlist').val(data.PCNNo);
$('#monitor').val(data.Monitor);
$('#env').val(data.Environment);
$('#trial').val(data.Trial);
$('#resp').val(data.Responsible);
$('#deadline').val(data.Deadline);
$('#dataModal').modal('show');
}
});
});
$(document).on('click', '#update', function(){
var pcr_number = document.getElementById("PCR").value;
var Comments= document.getElementById("Comments").value;
var approval= document.getElementById("approval").value;
var review= document.getElementById("review").value;
var cat= document.getElementById("cat").value;
var monitor= document.getElementById("monitor").value;
var env= document.getElementById("env").value;
var trial= document.getElementById("trial").value;
var resp= document.getElementById("resp").value;
var deadline= document.getElementById("deadline").value;
var PCC = document.getElementById("PCC").value;
$.ajax({
url:"edit.php",
method:"POST",
data:{pcr_number:pcr_number, Comments:Comments, PCC:PCC, approval:approval, review:review, cat:cat, monitor:monitor, env:env, trial:trial, resp:resp, deadline:deadline},
dataType:"text",
success:function(data)
{
alert('PCR Information Updated');
}
});
});
});
</script>
this is my fetch.php
<?php
$SelectedPCRNo = $_POST['pcr_number'];
if(isset($_POST['pcr_number']))
{
$output = '';
$hostname = "localhost";
$username = "root";
$password = "";
$databaseName = "change_management";
$dbConnected = #mysqli_connect($hostname, $username, $password);
$dbSelected = #mysqli_select_db($databaseName,$dbConnected);
$dbSuccess = true;
if ($dbConnected) {
if ($dbSelected) {
echo "DB connection FAILED<br /><br />";
$dbSuccess = false;
}
} else {
echo "MySQL connection FAILED<br /><br />";
$dbSuccess = false;
}
$sql = mysqli_query($dbConnected, "SELECT * FROM change_management.tPCR INNER JOIN change_management.tcomplement ON change_management.tPCR.PCRNo = change_management.tcomplement.PCRNo INNER JOIN change_management.tPCN ON change_management.tPCR.PCRNo = change_management.tPCN.PCRNo WHERE tPCR.PCRNo = '".$_POST['pcr_number']."'");
$row = mysqli_fetch_array($sql);
echo json_encode($row);
}
?>
I have no problems with the results and the table is filled OK, only the #PCNlist should be filled with the values of all rows it is related and now just is just coming one value, the first row only. Is there any way to bring the whole PCNlist only changing some code at the fetch.php?
If I understood you correctly, the table tPCN can contain multiple rows associated with each PCR number. And you want to fetch all these rows and return them in your JSON.
If you want to achieve that, but also make sure the other two tables only return one row, then I think simply you should remove the JOIN to tPCN in your first query, and then create a second query to fetch the tPCN rows specifically.
$output = [];
$stmt = $dbConnected->prepare("SELECT * FROM change_management.tPCR INNER JOIN change_management.tcomplement ON change_management.tPCR.PCRNo = change_management.tcomplement.PCRNo WHERE tPCR.PCRNo = ?");
$stmt->bind_param('s', $_POST['pcr_number']);
$stmt->execute();
$result = $stmt->get_result();
//select a single row from the result and assign it as the output variable
if ($row = $result->fetch_assoc()) {
$output = $row;
}
$stmt2 = $dbConnected->prepare("SELECT * FROM change_management.tPCN WHERE PCRNo = ?");
$stmt2->bind_param('s', $_POST['pcr_number']);
$stmt2->execute();
$result2 = $stmt2->get_result();
$output["tPCN"] = array(); //create a new property to put the tPCN rows in
//loop through all the tPCN rows and append them to the output
while ($row2 = $result2->fetch_assoc()) {
$output["tPCN"][] = $row2;
}
echo json_encode($output);
This will produce some JSON with this kind of structure:
{
"PCRNo": "ABC",
"CreationDate": "2019-08-07",
"Name": "A N Other",
//...and all your other properties, until the new one:
"tPCN": [
{
"SomeProperty": "SomeValue",
"SomeOtherProperty": "SomeOtherValue",
},
{
"SomeProperty": "SomeSecondValue",
"SomeOtherProperty": "SomeOtherSecondValue",
}
]
}
You will then need to amend your JavaScript code to be able to deal with the new structure. Since I don't know exactly which fields come from the tPCN table, I can't give you an example for that, but hopefully it's clear that you will need to loop through the array and output the same HTML for each entry you find.
N.B. As you can see I re-wrote the query code to use prepared statements and parameterised queries, so you can see how to write your code in a secure way in future.
P.S. You have a lot of code there in the "success" function just to set the values of individual fields. You might want to consider using a simple JS templating engine to make this less verbose and cumbersome, and generate the HTML you need with the values automatically added into it in the right place. But that's a separate issue, just for the maintainability of your code
I've added this code into my ajax function to bring only what I needed and it works + what #ADyson has posted.
var PCN = data.tPCN;
var i;
var PCNList = '';
for (i = 0; i < PCN.length; i++){
var PCNList = PCNList + PCN[i]['PCNNo'] + ' - ' + PCN[i]['Stage'];
}
$('#PCNlist').val(PCNList);
I've been trying to use AJAX and JSON to show the contents of individual items from my database through the following codes below. What I'm trying to achieve is that whenever an individual item is opened or clicked, it will show up its unique content on the next page.
However, succeeding items just show the details of the initial item which has the ID '1'. I have more than 10 items in my DB and I want these to reflect their corresponding data.
//productpage_endpoint.php
require "connection.php";
$id = $_POST['id'];
$sql = "SELECT * FROM items WHERE id = $id";
$result = mysqli_query($conn,$sql);
$result = mysqli_fetch_assoc($result);
echo json_encode($result);
<script type="text/javascript">
$.post('productpage_endpoint.php',**{id: 1}**,
function(data){
var item = JSON.parse(data)
$('input[name=name]').val(item.name)
$('input[name=description]').val(item.description)
$('input[name=price]').val(item.price)
$('#item_image').attr('src',item.image)
}
)
</script>
If you'd like to request all items in the table:
$sql = "SELECT * FROM items";
In JS you'll need to create new elements for all of the values. Otherwise you'll overwrite the existing form values.
$.post('productpage_endpoint.php',
function(data){
for (var item in data) {
$('<input>')
.attr('name', 'name')
.attr('type', 'text')
.val(item.name);
// ...
// Add to your form...
}
}
)
Im trying to use a dojo ajax function to call a PHP file that then returns the contents of a DB table in JSON format.
My function:
var _getWeatherInfo = function(){
dojo.xhrget({
url: "PHP/weather.php?ntown=" + _ntown,
handleAs: "json",
timeout: 5000,
load: function(responce, details) {
_updateWeathertData
},
error: function(error_msg, details) {
_handleError(error_msg);
}
});
}
My PHP:
<?php include('configHome.php'); ?>
<?php
$ntown = $_GET['ntown'];
$weather = array();
$query="SELECT * FROM `weather` WHERE `town` = '$ntown'";
$result=mysql_query($query);
while($row = mysql_fetch_row($result)) {
$weather[] = $row[0];
}
echo json_encode($weather);
mysql_close();
?>
When using this code I am getting an error message saying that "$ntown = $_GET['ntown'];" is an undefined index. I have tried removing the index all together and using an actual value in the select statement (i.e. SELECT * FROM weather WHERE town = 'Auckland') but all I get back is the value i enter ["Auckland"], and not the 3 other values that are meant to be returned, ["Auckland", "Sunny", "8", "14"].
Any ideas? I can try add more info if needed. Thanks!
There are some other issues with your code, but to get to the one you are asking the question about. You have this:
while($row = mysql_fetch_row($result)) {
$weather[] = $row[0];
}
What you are doing is just taking the first value of the row (of which there is probably only one, and just sending that back. This is what you need:
$weather = mysql_fetch_row($result);
I have two autocomplete fields in my form. I populate the first field's list by using the following code...
$result = mysql_query("SELECT * FROM exercise_strength");
$arr_autoCompleteExerciseStr=array();
$s=0;
while($row = mysql_fetch_array($result)){
$autoCompleteExerciseStr = "\"".ucfirst($row['exercise'])."\", ";
$arr_autoCompleteExerciseStr[$s] = $autoCompleteExerciseStr;
$s++;
}
and...
$(function() {
var availableTags = [
<?php for($k=0; $k<sizeof($arr_autoCompleteExerciseStr); $k++) {echo $arr_autoCompleteExerciseStr[$k]; } ?>
];
$( "#inputExercise" ).autocomplete({
source: availableTags,
minLength: 0
});
$( "#inputExercise" ).focus(function(){
$(this).autocomplete("search");
});
});
The same code with a different mysql_query is used for the other field. What I want to do is change the list of the second field based on what's typed in the first. For instance, if the user types Chest in the first field, a list of relevant Exercises is shown in the second field, selected from my sql database.
What is the best way to do this?
I would prefer if I wouldn't have to leave the page, cause then the user have to refill the rest of the form..
Please help! :)
-- UPDATE --
Based on your advice about JSON my code now looks like this.
Script:
$(document).ready(function(){
$.post('json_exercise.php', { /**/ }, showExercise, "text");
});
function showExercise(res){
var list = JSON.parse(res);
$("#inputExercise").autocomplete({
source: list,
minLength: 0
});
$( "#inputExercise" ).focus(function(){
$(this).autocomplete("search");
});
}
PHP file:
$con = mysql_connect(***);
if (!$con) {die('Could not connect: ' . mysql_error());}
mysql_select_db("test", $con);
$result = mysql_query("SELECT * FROM exercise_strength");
$i = 0;
while($row = mysql_fetch_array($result, MYSQL_ASSOC))
{
//add the row to the $chat array at specific index of $i
$exercise[$i] = $row['exercise'];
$i += 1;
}
echo json_encode($exercise);
Now I just need to change the php filed based on whats selected in the first autocomplete field.
If you want to autocomplete based on results from a SQL query without having to leave the page, you might want to look into AJAX and JSON.
Also, please use PDO instead of the mysql_* functions for interfacing with DBMS's with PHP.
Using Javascript I need to get some rows from a DB table, and then loop through each row and use different fields from each row.
For example, if I get the rows like this:
var coordinatesArray = '<?php
global $wpdb;
echo $wpdb->get_var("SELECT * FROM users_coordinates WHERE lat>20 and lat<40 and long>-10 and long<40);
?>';
How should I write the following code:
// for each row do: {
// alert the id field
// alert the lat field
// alert the long field
// }
JSON is the way to put the output in, that ensures that the result will be valid JavaScript and protects you from arbitrary code execution in JS.
var coordinatesArray = <?php
global $wpdb;
// replace * by id, lat and long since you don't need other fields
$sql = "SELECT id, lat, long FROM users_coordinates WHERE lat>20 and lat<40 and long>-10 and long<40";
$rows = $wpdb->get_results($sql);
// if the function fails (?), make valid JS syntax
if (is_array($rows)) {
echo json_encode($rows);
} else {
echo '[]';
}
?>;
for (var i=0; i<coordinatesArray; i++) {
alert(coordinatesArray[i].id);
alert(coordinatesArray[i].lat);
alert(coordinatesArray[i]["long"]);
}
The other way would be creating a JS object with the id field as key of the JS object:
var coordinatesMap = <?php
global $wpdb;
// replace * by id, lat and long since you don't need other fields
$sql = "SELECT id, lat, long FROM users_coordinates WHERE lat>20 and lat<40 and long>-10 and long<40";
// note: OBJECT_K, the result will be an associative array with the first field of a
// row as key
$rows = $wpdb->get_results($sql, OBJECT_K);
// if the function fails (?), make valid JS syntax
if (is_array($rows)) {
echo json_encode($rows);
} else {
echo '{}';
}
?>;
for (var id in coordinatesMap) {
if (coordinatesMap.hasOwnProperty(id)) {
alert(id);
alert(coordinatesMap[id].lat);
alert(coordinatesMap[id]["long"]);
}
}
Please replace alert by something else, it's not really user-friendly. Remember that PHP != JavaScript and you cannot use PHP functions in JavaScript and vice versa. If you're not sure how the output would look like, use the View source option of a page.
References:
http://codex.wordpress.org/Class_Reference/wpdb#SELECT_Generic_Results
You may have a better time writing your own custom PHP script to fetch these values (rather than depending on WP), loop through them, and build a json object that you return to the javascript.
First, $wpdb->get_var can only get one value. http://codex.wordpress.org/Class_Reference/wpdb#SELECT_a_Variable
Use $wpdb->get_results instead
http://codex.wordpress.org/Class_Reference/wpdb#SELECT_Generic_Results
var coordinatesArray = '<?php
global $wpdb;
echo $wpdb->get_results("SELECT * FROM users_coordinates WHERE lat>20 and lat<40 and long>-10 and long<40);
?>';
for(coord in coordinatesArray) {
alert(coordinatesArray[coord].id);
alert(coordinatesArray[coord].lat);
alert(coordinatesArray[coord].long);
}
I haven't tested, but it should be something like that.