PHP Registration form error on 13th line [duplicate] - php

Question

This question already has answers here:
PHP parse/syntax errors; and how to solve them
(20 answers)
Closed 4 years ago.
i've been trying to fix this error past 4 hours now, and i lost my hopes to do it on my own, so i've getting this error:
Parse error: syntax error, unexpected '||' (T_BOOLEAN_OR) in D:\xampp\htdocs\Login system\includes\signup.inc.php on line 13
How to get it fixed? I overlooked everywhere cuz i knew somewhere could be some left unclosed brackets.
And heres my php code, HELP ALLERT :<
<?php
if (isset($_POST['submit'])) {
include_once 'dbh.inc.php';
$uid = mysqli_real_escape_string($conn, $_POST['uid']);
$pwd = mysqli_real_escape_string($conn, $_POST['pwd']);
$email = mysqli_real_escape_string($conn, $_POST['email']);
//Error Handlers
//check for empty fields
if (empty($uid) || empty(email) || empty($pwd)) {
header("Location: ../signup.php?signup=empty");
exit();
} else {
//Check if input characters are valid
if (!preg_match("/^[a-zA-Z*$/]", $uid)) {
header("Location: ../signup.php?signup=empty");
exit();
} else {
//Check if email is valid
if (!filter_var($email, FILTER_VALIDATE_EMAIL))
header("Location: ../signup.php?signup=empty");
exit();
} else {
$sql = "SELECT * FROM users WHERE user_uid='$uid'";
$result = mysql_query($conn, $sql);
$resultCheck = mysqli_num_rows($result);
if($resultCheck > 0) {
header("Location: ../signup.php?signup=usertaken");
exit();
} else {
//Haching the password
$hashedPwd = password_hash($pwd, PASSWORD_DEFAULT);
//Insert the user into the database
$sql = "INSERT INTO users (user_email, user_uid, user_pwd)
VALUES ('$uid', '$email', '$hashedPwd' );";
$result = mysqli_query($conn, $sql);
header("Location: ../signup.php?signup=success");
exit();
}
}
}
} else {
header("Location: ../signup.php");
exit();
}

Answer 1

You're writing the if-else statements the wrong way, the error you're getting is from the if statement with no opening and closing curly brackets, same goes for the other ones.
try this one:
<?php
include_once 'dbh.inc.php';
if (!isset($_POST['submit'])) {
header("Location: ../signup.php");
exit();
}
$uid = mysqli_real_escape_string($conn, $_POST['uid']);
$pwd = mysqli_real_escape_string($conn, $_POST['pwd']);
$email = mysqli_real_escape_string($conn, $_POST['email']);
//Error Handlers
//check for empty fields
if (empty($uid) || empty(email) || empty($pwd)) {
header("Location: ../signup.php?signup=empty");
exit();
}
if (!preg_match("/^[a-zA-Z*$/]", $uid)) {
header("Location: ../signup.php?signup=empty");
exit();
}
if (!filter_var($email, FILTER_VALIDATE_EMAIL)){
header("Location: ../signup.php?signup=empty");
exit();
}
if($resultCheck > 0) {
header("Location: ../signup.php?signup=usertaken");
exit();
}
$sql = "SELECT * FROM users WHERE user_uid='$uid'";
$result = mysql_query($conn, $sql);
$resultCheck = mysqli_num_rows($result);
if($resultCheck > 0) {
header("Location: ../signup.php?signup=usertaken");
exit();
}
//Haching the password
$hashedPwd = password_hash($pwd, PASSWORD_DEFAULT);
//Insert the user into the database
$sql = "INSERT INTO users (user_email, user_uid, user_pwd) VALUES ('$uid', '$email', '$hashedPwd' );";
$result = mysqli_query($conn, $sql);
header("Location: ../signup.php?signup=success");
exit();