PHP concatenation not working properly - php

Question

So i'm trying to build a pagination for my website without refreshing the page.
I'm using ajax, php and mysql for that purpose.
At the moment i'm stuck with php, specifically with foreach and concatenation.
Here's my foreach loop:
if (isset($_POST['page'])) {
$algus = $_POST['page'];
$loos = '';
$mitu = 5;
$msg = [];
foreach (uritused($conn, $id, $algus, $mitu) as $key => $vals) {
$loos .= "<tr class='tr-data'>";
$loos .= '<td>'.$vals['eventi_nimi'].'<br><span class="owner" data-id="'.$vals['owner-id'].'">'.$vals['owner'].'</span></td>';
$loos .= '<td data-loosiaeg="'.$vals['loosiAeg'].'">'.$vals['loosiAeg'].'</td>';
$loos .= '<td>'.$vals['attendiloos'].'</td>';
$loos .= '<td>';
if (is_array($vals['auhinnad'])) {
foreach($vals['auhinnad'] as $keys => $val){
$loos .= $val['auhind'].'<br>';
}
} else {
$loos .= $vals['auhinnad'];
}
$loos .= '</td>';
$loos .= '<td>Postitus: '.$vals['tingimused']['postitus'].'<br>Osalus: '.$vals['tingimused']['osalus'].'</td>';
$loos .= '<td>';
if (is_array($vals['valista'])) {
foreach($vals['valista'] as $keys => $val){
$loos .= $val['nimi'].'<br>';
}
} else {
$loos .= $vals['valista'];
}
$loos .= '</td>';
$loos .= '<td data-sec='.$vals['sec'].' class="tr-icons">
<i class="material-icons staatus ' . $vals['staatus'] . '" data-staatus="'.$vals['staatus'].'" data-toggle="tooltip" data-placement="bottom" data-class="stopped" data-eltext="radio_button_checked" data-text="radio_button_unchecked" title="Peata loosimine">radio_button_checked</i></td>';
$loos .= "</tr>";
}
$msg['data'] = $loos;
$msg['success'] = true;
echo json_encode($msg);
}
Here's my ajax call
var page = 1;
$.ajax({
type: "POST",
url: "pages/php/loosid_data.php",
cache: false,
dataType: 'json',
data: {'page': page},
success: function(msg){
console.log(msg);
if(msg['success']){
$('.tr-data').remove();
$('.m-loosid table').append(msg['data']);
}
},
error: function(msg){
console.log(msg);
}
});
EDIT: Heres the function
function uritused($conn, $id, $algus, $mitu){
try{
$uritused = $conn->prepare("SELECT COUNT(*) FROM loosid WHERE usr_id='$id'");
$uritused->execute();
}catch(PDOException $e){
echo $e->getMessage();
}
$uritus_arr = [];
$count = $uritused->fetchColumn();
if($count > 0){
try{
$urituseds = $conn->prepare("SELECT * FROM loosid WHERE usr_id='176237127636' ORDER BY loosiAeg DESC LIMIT 1, 5");
$urituseds->execute();
}catch(PDOException $e){
echo $e->getMessage();
}
$uritus = $urituseds->fetchAll();
for ($z=0;$z<$count;$z++) {
$uritus_arr[$z] = array(
'eventi_nimi' => $uritus[$z]['eventi_nimi'],
'loosiAeg' => $uritus[$z]['loosiAeg'],
'tingimused' => array(
'postitus' => $uritus[$z]['post'],
'osalus' => $uritus[$z]['osalus']
),
'sec' => $uritus[$z]['sec'],
'staatus' => $uritus[$z]['staatus'],
'attendiloos' => $uritus[$z]['attendiloos']
);
$auhinnad = explode(',', $uritus[$z]['auhinnad']);
if($uritus[$z]['auhinnad'] != '-'){
foreach ($auhinnad as $key) {
$auhind = explode('-', $key);
$auhinna_arr[] = array(
'auhind' => $auhind[0],
'voitjad' => $auhind[1]
);
}
$uritus_arr[$z]['auhinnad'] = $auhinna_arr;
}else{
$uritus_arr[$z]['auhinnad'] = $uritus[$z]['auhinnad'];
}
$valista = explode(',', $uritus[$z]['valista']);
if($uritus[$z]['valista'] != '-'){
foreach ($valista as $keys) {
$valistad = explode('-', $keys);
$valista_arr[] = array(
'nimi' => $valistad[0],
'id' => $valistad[1]
);
}
$uritus_arr[$z]['valista'] = $valista_arr;
}else{
$uritus_arr[$z]['valista'] = $uritus[$z]['valista'];
}
$valista_arr = [];
$auhinna_arr = [];
}
}
return $uritus_arr;
}
THIS NOW GIVES ME UNDEFINED OFFSET, ALTHOUGH I KNOW THAT THERE'S DATA WITH THAT INFO IN THE DB.
For some reason the data is always empty.
Whenever i try to run this same code inside my page directly without ajax, everything works as it should.
Maybe you guys have any suggestions on how to fix this? I know that there's already same kind of posts out here but i haven't found my answer yet.

Answer 1

#Gino Pane
I'm sorry but thats not the case actually. It seems that i made a rookie mistake with my query. I have only one instance of data in the database but my limit is set to 1, 5 but it should be 0, 5.
Basically my query was looking data from the database starting at 1 when it should've started at 0. Thats why it seemed to me that there is no data in the database.
I also said that when i echo foreach directly on the page it works because i had more than 1 instance of data in the database at that time.
Sorry for wasting your time guys.