SQL can't found any values - mysql

Question

i'm having trouble returning values of sql rows, my SQL request work well on console but can't return a row of it with my code, any help ? thanks !
<?php
require_once 'sql.php';
$sqlConnexion = new mysqli($hn,$un,$pw,$db);
if($sqlConnexion->connect_error){
die ('Soucis de connexion SQL');}
$date = date("d/m/y G:i:s");
if(isset($_POST['zoneDeText'])){
$area = $_POST['zoneDeText'];
$queryone= "SELECT SortieTraitée FROM entry WHERE entréesUtilisateurs=?";
$instruction = $sqlConnexion->prepare($queryone);
if(!$instruction->prepare($queryone)){
echo "$instruction->errno";
}else{
$instruction->bind_param('s', $area);
$instruction->execute();
$result = $instruction->get_result();
while ($row = $result->fetch_array(MYSQLI_NUM)){
foreach ($row as $out){
if($out == $area){
echo $out;
}elseif($out != $area){
echo 'Still not found';
}
}
}
$instruction->close();
}
?>

Answer 1

You don't actually print anything, you just return the value, which makes no sense unless your code is inside a function.
if($out == $area){
return $out;
}
The documentation http://php.net/return says:
If return is called from within the main script file, then script execution ends.
Unless the code you show above has been included in another PHP script, that means it will just end the script and output nothing.
There are several other confusing things your script, but the above is probably the one directly responsible for the problem you're asking about.
Here's how I might write this code:
if (isset($_POST['zoneDeText'])) {
$area = $_POST['zoneDeText'];
$queryone = "SELECT SortieTraitée FROM entry WHERE entréesUtilisateurs=?";
$instruction = $sqlConnexion->prepare($queryone);
// if the prepare fails, it is false
if ($instruction === false) {
// false is not an object, it has no error attribute
// the error is an attribute of the connection
die($sqlConnexion->error);
}
$instruction->bind_param('s', $area);
$instruction->execute();
$result = $instruction->get_result();
// if there are zero rows in the result, the while loop
// will finish before it starts, so there will be no output
// so first check for a result of zero rows in the result
if ($result->num_rows == 0) {
echo("Found zero rows");
} else {
while ($row = $result->fetch_assoc()) {
echo $row["SortieTraitée"];
}
}
$instruction->close();
}