How to upload file in PHP if not exist - php

Question

I readed all about this in PHP.net but i can't find the solution. I know how to upload files into a new row in Mysql and PHP, but I don't know how to UPDATE a row and not delete the previous uploaded file if I don't upload anything.
For example, I have this form:
LOGO
Name of Business
Image 1
For example: I have this in MYSQL:
LOGO: /img/logo1.png
NAME: business1
IMAGE 1: ""
I want to do if I don't upload anything in LOGO and I'm editing this business (leaving in blank the input file of LOGO), do not upload my logo and SET a blank one ("").
This is the code of PHP:
define("MAX_SIZE", "2000");
function getExtension($str) {
$i = strrpos($str, ".");
if (!$i) {
return "";
}
$l = strlen($str) - $i;
$ext = substr($str, $i + 1, $l);
return $ext;
}
$errors = 0;
$image = $_FILES['foto0']['name'];
$image1 = $_FILES['foto1']['name'];
if ($image) {
$filename = stripslashes($_FILES['foto0']['name']);
$extension = getExtension($filename);
$extension = strtolower($extension);
if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif")) {
$errors = 1;
$falloExtension = true;
} else {
$size = filesize($_FILES['foto0']['tmp_name']);
if ($size > MAX_SIZE * 2024) {
$errors = 1;
$falloLimite = true;
}
$image_name = uniqid() . '.' . $extension;
$newname = "img/detalles/" . $image_name;
$newname2 = "img/detalles/" . $image_name;
$copied = copy($_FILES['foto0']['tmp_name'], $newname2);
if($copied) {
$copiar = "UPDATE negocios SET logo='$newname' WHERE id=$numNegocio";
$resultado = $mysqli->query($copiar);
//header("location: ../anunciate.php");
} else {
//header("location: ../anunciate.php?fallo=true");
}
}
}
if ($image1) {
$filename = stripslashes($_FILES['foto1']['name']);
$extension = getExtension($filename);
$extension = strtolower($extension);
if (($extension != "jpg") && ($extension != "jpeg") && ($extension != "png") && ($extension != "gif")) {
$errors = 1;
$falloExtension = true;
} else {
$size = filesize($_FILES['foto1']['tmp_name']);
if ($size > MAX_SIZE * 2024) {
$errors = 1;
$falloLimite = true;
}
$image_name = uniqid() . '.' . $extension;
$newname = "img/detalles/" . $image_name;
$newname2 = "img/detalles/" . $image_name;
$copied = copy($_FILES['foto1']['tmp_name'], $newname2);
if($copied) {
$copiar = "UPDATE galerias SET imagen1='$newname' WHERE negocios_id=$numNegocio";
$resultado = $mysqli->query($copiar);
//header("location: ../anunciate.php");
} else {
//header("location: ../anunciate.php?fallo=true");
}
}
}
if(isset($_POST['modificanegocio'])) {
$nombrePOST = $_POST['nombre'];
$categoriaPOST = $_POST['categoria'];
$direccionPOST = $_POST['direccion'];
$telefonoPOST = $_POST['telefono'];
$correoPOST = $_POST['correo'];
$descripcionPOST = $_POST['descripcion'];
$horarioPOST = $_POST['horario'];
$paginawebPOST = $_POST['paginaweb'];
$keywordsPOST = $_POST['keywords'];
$latPOST = $_POST['lat'];
$longPOST = $_POST['long'];
$facebookPOST = $_POST['facebook'];
$googlePOST = $_POST['google'];
$twitterPOST = $_POST['twitter'];
$insagramPOST = $_POST['insagram'];
$logoPOST = $_POST['logo'];
if($modificaNegocio = $mysqli->query("UPDATE negocios SET name = '$nombrePOST, logo = '$logoPOST', image1 = $image1POST WHERE id = $id")) {
$modifica = true;
} else {
$modifica = false;
}
}

Answer 1

I solved this spliting the MYSQL code:
$query = "UPDATE negocios SET nombre = '$nombrePOST'";
if($image != "" || $image != null) {
//NOW I WILL UPLOAD THE IMAGE HERE AND UPLOAD THE QUERY
}
$query .= " WHERE id = $id";
if($modificaNegocio = $mysqli->query($query)) {
$modifica = true;
} else {
$modifica = false;
}
}