$facebookErr = "Dia chi Facebook khong dung dinh dang"; } } if (empty($_POST['gender'])) { $genderErr = "Ban phai chon gioi tinh"; } else { $gender = kiemtra($_POST['gender']); } if ($_POST['trinhdo'] == 0) { $trinhdoErr = "Ban hay chon trinh do cua Ban"; } else { $trinhdo = kiemtra($_POST['trinhdo']); } // xu ly ngay thang sinh if (!empty($_POST['ngaysinh'])) { $ngaysinh = kiemtra($_POST['ngaysinh']); $tam = explode('/', $ngaysinh); if (count($tam) != 3) { $ngaysinhErr = "Ban nhap vao chua dung dinh dang ngay thang"; } else { if (is_numeric($tam[2]) && is_numeric($tam[1]) && is_numeric($tam[0])) { if ($tam[1] > 12 || $tam[1] < 1) { $ngaysinhErr = "Thang phai nho hon 12"; } else { if ($tam[0] > 31 && $tam[0] < 1) { $ngaysinhErr = 'Ngay phai nho hon 31'; } } } else { $ngaysinhErr = "Ban phai nhap ngay thang nam la kieu so"; }
<?php $name = $email = $website = $age = $facebook = $gender = $trinhdo = $ngaysinh = ''; $nameErr = $emailErr = $websiteErr = $ageErr = $trinhdoErr = $facebookErr = $genderErr = $ngaysinhErr = ""; if ($_SERVER['REQUEST_METHOD'] == 'POST') { if (empty($_POST['name'])) { $nameErr = "Ban phai nhap ten"; } else { $name = kiemtra($_POST['name']); // kiem tra name if (!preg_match("/^[a-zA-Z ]*\$/", $name)) { $nameErr = "Ten chi duoc chua chu cai va dau cach"; } } } function kiemtra($dulieu) { $dulieu = trim($dulieu); $dulieu = stripslashes($dulieu); $dulieu = htmlspecialchars($dulieu); return $dulieu; } ?> <form method="POST" action="<?php echo htmlspecialchars($_SERVER['PHP_SELF']); ?> "> Ho Ten : <input type="text" name="name" value="<?php echo $name;