javascript - Using Php, mySql, ajax, (xmlhttp) and JS,how can i create a php multidimensional send it to JS and use it?
Get the solution ↓↓↓Solution:
One problem with your PHP is that
while($row = mysqli_fetch_array($result1){
is missing the second brace. It should be:
while($row = mysqli_fetch_array($result1)){
Also the URL in the ajax request should be the full URL, not just getpos.php
Thirdly you have written xrh.responseText (should be xhr).
Basically there's loads of syntax errors in your code - you should use the javascript console to debug the front end ones, and PHP logging or error display for the back end ones. You should only need help here once you've debugged all obvious syntax errors.
EDIT - below is a working example (although I haven't done the MySQL part)
JS + HTML:
<span id='pi'></span>
<select id='nameIti'>
<option value='foo'>foo</option>
<option value='bar'>bar</option>
</select>
<script>
function newMark(lat,lng) {
console.log(lat);
console.log(lng);
}
var selI = document.getElementById("nameIti");
selI.onchange = function(){
var val = this[this.selectedIndex].getAttribute("value");
showMark(val);
}
function showMark(val){
var str=val;
var xhr;
// if(str==""){
// return;
// }
if(window.XMLHttpRequest){
xhr=new XMLHttpRequest();
}
else{
xhr=new ActiveXObject("Microsoft.XMLHTTP");
}
xhr.onreadystatechange=function(){
if(xhr.readyState==4 && xhr.status ==200){
var result = JSON.parse(xhr.responseText);
console.log(result);
for(var a in result){
newMark(result[a]['lat'], result[a]['lng']);
document.getElementById("pi").innerHTML = result[a]['lat'] + ', ' + result[a]['lng'];
}
}
}
// xhr.open("GET", "getpos.php?q="+str, true);
xhr.open("GET", "getpos.php?q="+str, true);
xhr.send();
}
</script>
PHP:
<?php
$nom = $_GET['q'];
$data = array();
if($nom == 'foo') {
$data['lat'] = '5.12';
$data['lng'] = '0.34';
$resp[] = $data;
}
else if($nom == 'bar') {
$data['lat'] = '2.34';
$data['lng'] = '1.34';
$resp[] = $data;
}
echo json_encode($resp);
?>
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