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function.php
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function.php
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<?php
//membuat koneksi
$conn=mysqli_connect("localhost", "root", "", "phpdatabse");
if(!$conn){
die('Koneksi Error : '.mysqli_connect_errno()
.' - '.mysqli_connect_error());
}
//ambil data dari tabel mahasiswa/query data mahasiswa
$result=mysqli_query($conn,"SELECT * FROM mahasiswa");
//function query akan menerima isi parameter dari string query yang ada pada index2.php (line 3)
function query($query_kedua){
//dikarena $conn diluar function query maka dibutuhkan scope global $$conn
global $conn;
$result = mysqli_query($conn, $query_kedua);
//wadah kosong untuk menampung isi array pada saat looping line 16
$rows = [];
while ($row = mysqli_fetch_assoc($result)){
$rows[] = $row;
}
return $rows;
}
function tambah ($data) {
global $conn;
$Nama = htmlspecialchars($_POST["Nama"]);
$Nim = htmlspecialchars($_POST["Nim"]);
$Email = htmlspecialchars($_POST["Email"]);
$Jurusan = htmlspecialchars($_POST["Jurusan"]);
// $Gambar = htmlspecialchars($_POST["Gambar"]);
$Gambar = upload();
if(!$Gambar){
return false;
}
$query = " INSERT INTO mahasiswa
VALUES
('','$Nama','$Nim','$Email','$Jurusan','$Gambar')";
mysqli_query($conn, $query);
return mysqli_affected_rows($conn);
}
function hapus ($id){
global $conn;
mysqli_query($conn, "DELETE FROM mahasiswa WHERE id =$id");
return mysqli_affected_rows($conn);
}
function edit ($data){
global $conn;
$id = $data["id"];
$Nama = htmlspecialchars($data["Nama"]);
$Nim = htmlspecialchars($data["Nim"]);
$Email = htmlspecialchars($data["Email"]);
$Jurusan = htmlspecialchars($data["Jurusan"]);
$Gambarlama = htmlspecialchars($data["Gambarlama"]);
//cek apakah user menekan button browse
if($_FILES['Gambar'][error] === 4){
$Gambar = $GambarLama;
} else {
$Gambar = upload();
}
$query = " UPDATE mahasiswa SET
Nama = '$Nama',
Nim = '$Nim',
Email = '$Email',
Jurusan = '$Jurusan',
Gambar = '$Gambar'
WHERE id = $id";
mysqli_query($conn, $query);
return mysqli_affected_rows($conn);
}
function cari($keyword){
$sql = "SELECT * FROM mahasiswa
WHERE
Nama LIKE '%$keyword%' OR
Nim LIKE '%$keyword%' OR
Email LIKE '%$keyword%' OR
Jurusan LIKE '%$keyword%'
";
return query($sql);
}
function upload() {
$Nama_file = $_FILES['Gambar']['name'];
$Ukuran_file = $_FILES['Gambar']['size'];
$Error = $_FILES['Gambar']['error'];
$Tmpfile = $_FILES['Gambar']['tmp_name'];
if($Error===4){
//pastikan pada inputan gambar tidak terdapat atribut required
echo "
<script>
alert('Tidak ada gambar diupload');
</script>
";
return false;
}
$Jenis_gambar = ['jpg', 'jpeg', 'gif'];
$Pecah_gambar = explode('.', $Nama_file);
$Pecah_gambar = strtolower(end($Pecah_gambar));
if(!in_array($Pecah_gambar, $Jenis_gambar)){
echo "
<script>
alert('Yang anda upload bukan file gambar');
</script>
";
return false;
}
//cek kapasitass gambar dalam byte, kalau 1000000 byte = 1mb
if($Ukuran_file > 1000000){
echo "
<script>
alert('Ukuran gambar terlalu besar');
</script>
";
return false;
}
//generate id untuk penamaan gambar dengan function uniqid()
$Namafilebaru = uniqid();
$Namafilebaru .= '.';
$Namafilebaru .= $Pecah_gambar;
move_uploaded_file($Tmpfile, 'img/'. $Namafilebaru);
//kita return nama filenya agar dapat masuk ke $Gambar=$upload() pada function tambah
return $Namafilebaru;
}
function registrasi($data){
global $conn;
//stripclashes digunakan untuk enghilangkan blackslashes
$username = strtolower(stripcslashes($data['username']));
$password = mysqli_real_escape_string($conn, $data['password']);
$password2 = mysqli_real_escape_string($conn, $data['password2']);
$result = mysqli_query($conn, "SELECT username FROM user WHERE username = '$username' ");
//cek kondisi jika line 175 nilai true maka cetak echo
if(mysqli_fetch_assoc($result)){
echo "
<script>
alert('Username sudah ada');
</script>
";
return false;
}
//cek konfirmasi pasword
if($password !== $password2){
echo "
<script>
alert('Password anda tidak sama');
</script>
";
return false;
}
$password = md5($password);
// $password = password_hash($password, PASSWORD_DEFAULT);
var_dump($password);
mysqli_query($conn, "INSERT INTO user VALUES ('', '$username', '$password')");
return mysqli_affected_rows($conn);
}
?>