De PHPhulp kroeg
Resultaat door een selectbox
Code (php)
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<html>
<head>
<script src=
"https://code.jquery.com/jquery-3.2.1.min.js">
</script>
<script src=
"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"
type="text/javascript">
</script>
<link rel="stylesheet" href=
"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
</script>
</head>
<body>
<div class="container">
<h1>GeeksForGeeks</h1>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label>User Id</label>
<input type='text' name="user_id"
id='user_id' class='form-control'
placeholder='Enter user id'
onkeyup="GetDetail(this.value)" value="">
</div>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label>First Name:</label>
<input type="text" name="first_name"
id="first_name" class="form-control"
placeholder='First Name'
value="">
</div>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label>Last Name:</label>
<input type="text" name="last_name"
id="last_name" class="form-control"
placeholder='Last Name'
value="">
</div>
</div>
</div>
</div>
<script>
// onkeyup event will occur when the user
// release the key and calls the function
// assigned to this event
function GetDetail(str) {
if (str.length == 0) {
document.getElementById("first_name").value = "";
document.getElementById("last_name").value = "";
return;
}
else {
// Creates a new XMLHttpRequest object
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
// Defines a function to be called when
// the readyState property changes
if (this.readyState == 4 &&
this.status == 200) {
// Typical action to be performed
// when the document is ready
var myObj = JSON.parse(this.responseText);
// Returns the response data as a
// string and store this array in
// a variable assign the value
// received to first name input field
document.getElementById
("first_name").value = myObj[0];
// Assign the value received to
// last name input field
document.getElementById(
"last_name").value = myObj[1];
}
};
// xhttp.open("GET", "filename", true);
xmlhttp.open("GET", "gfg.php?user_id=" + str, true);
// Sends the request to the server
xmlhttp.send();
}
}
</script>
</body>
</html>
<head>
<script src=
"https://code.jquery.com/jquery-3.2.1.min.js">
</script>
<script src=
"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/js/bootstrap.min.js"
type="text/javascript">
</script>
<link rel="stylesheet" href=
"https://maxcdn.bootstrapcdn.com/bootstrap/3.3.7/css/bootstrap.min.css">
<script src=
"https://ajax.googleapis.com/ajax/libs/jquery/3.4.1/jquery.min.js">
</script>
</head>
<body>
<div class="container">
<h1>GeeksForGeeks</h1>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label>User Id</label>
<input type='text' name="user_id"
id='user_id' class='form-control'
placeholder='Enter user id'
onkeyup="GetDetail(this.value)" value="">
</div>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label>First Name:</label>
<input type="text" name="first_name"
id="first_name" class="form-control"
placeholder='First Name'
value="">
</div>
</div>
</div>
<div class="row">
<div class="col-lg-6">
<div class="form-group">
<label>Last Name:</label>
<input type="text" name="last_name"
id="last_name" class="form-control"
placeholder='Last Name'
value="">
</div>
</div>
</div>
</div>
<script>
// onkeyup event will occur when the user
// release the key and calls the function
// assigned to this event
function GetDetail(str) {
if (str.length == 0) {
document.getElementById("first_name").value = "";
document.getElementById("last_name").value = "";
return;
}
else {
// Creates a new XMLHttpRequest object
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
// Defines a function to be called when
// the readyState property changes
if (this.readyState == 4 &&
this.status == 200) {
// Typical action to be performed
// when the document is ready
var myObj = JSON.parse(this.responseText);
// Returns the response data as a
// string and store this array in
// a variable assign the value
// received to first name input field
document.getElementById
("first_name").value = myObj[0];
// Assign the value received to
// last name input field
document.getElementById(
"last_name").value = myObj[1];
}
};
// xhttp.open("GET", "filename", true);
xmlhttp.open("GET", "gfg.php?user_id=" + str, true);
// Sends the request to the server
xmlhttp.send();
}
}
</script>
</body>
</html>
En dan het ophalen:
Code (php)
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<?php
// Get the user id
$user_id = $_REQUEST['user_id'];
// Database connection
$con = mysqli_connect("localhost", "root", "", "gfg");
if ($user_id !== "") {
// Get corresponding first name and
// last name for that user id
$query = mysqli_query($con, "SELECT first_name,
last_name FROM userdata WHERE user_id='$user_id'");
$row = mysqli_fetch_array($query);
// Get the first name
$first_name = $row["first_name"];
// Get the first name
$last_name = $row["last_name"];
}
// Store it in a array
$result = array("$first_name", "$last_name");
// Send in JSON encoded form
$myJSON = json_encode($result);
echo $myJSON;
?>
// Get the user id
$user_id = $_REQUEST['user_id'];
// Database connection
$con = mysqli_connect("localhost", "root", "", "gfg");
if ($user_id !== "") {
// Get corresponding first name and
// last name for that user id
$query = mysqli_query($con, "SELECT first_name,
last_name FROM userdata WHERE user_id='$user_id'");
$row = mysqli_fetch_array($query);
// Get the first name
$first_name = $row["first_name"];
// Get the first name
$last_name = $row["last_name"];
}
// Store it in a array
$result = array("$first_name", "$last_name");
// Send in JSON encoded form
$myJSON = json_encode($result);
echo $myJSON;
?>
De selectbox zou dan er moeten uitzien als:
Code (php)
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<select class="form-control" name="user_id" id="user_id">
<option value="1">Piet</option>
<option value="2">Kees</option>
<option value="3">Jan</option>
<option value="4">Wouter</option>
<option value="5">Willem</option>
</select>
<option value="1">Piet</option>
<option value="2">Kees</option>
<option value="3">Jan</option>
<option value="4">Wouter</option>
<option value="5">Willem</option>
</select>
Gewijzigd op 14/03/2022 11:47:22 door Kees Mulder
Heb je al je $_POST array in beeld gebracht met print_r() ?
PS: Hopelijk ben je je bewust van SQL-injection.
Code (php)
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<select class="form-control" name="user_id" id="user_id">
<option>Kies een naam</option>
<option value="1">Piet</option>
<option value="2">Kees</option>
<option value="3">Jan</option>
<option value="4">Wouter</option>
<option value="5">Willem</option>
</select>
<option>Kies een naam</option>
<option value="1">Piet</option>
<option value="2">Kees</option>
<option value="3">Jan</option>
<option value="4">Wouter</option>
<option value="5">Willem</option>
</select>
En het script door dit :
Code (php)
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<script>
$(document).ready(function(){
$('#user_id').on('change',function(){
var user_id = $(this).val();
if(user_id){
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
if (this.readyState == 4 && this.status == 200) {
var myObj = JSON.parse(this.responseText);
document.getElementById("first_name").value = myObj[0];
document.getElementById("last_name").value = myObj[1];
}
}
};
xmlhttp.open("GET", "gfg.php?user_id=" + user_id, true);
xmlhttp.send();
});
});
</script>
$(document).ready(function(){
$('#user_id').on('change',function(){
var user_id = $(this).val();
if(user_id){
var xmlhttp = new XMLHttpRequest();
xmlhttp.onreadystatechange = function () {
if (this.readyState == 4 && this.status == 200) {
var myObj = JSON.parse(this.responseText);
document.getElementById("first_name").value = myObj[0];
document.getElementById("last_name").value = myObj[1];
}
}
};
xmlhttp.open("GET", "gfg.php?user_id=" + user_id, true);
xmlhttp.send();
});
});
</script>
Kwam het voorbeeld hier tegen :
https://www.codexworld.com/dynamic-dependent-select-box-using-jquery-ajax-php/