/PHP/How to check user already exists in php

How to check user already exists in php

How to check if username already exists in php

$firstname = $_POST["firstname"];
$lastname = $_POST["lastname"];
$email = $_POST["email"];
$pass = $_POST["password"];

$check_email = mysqli_query($conn, "SELECT Email FROM crud where Email = '$email' ");
if(mysqli_num_rows($check_email) > 0){
    echo('Email Already exists');
}
else{
    if ($_SERVER["REQUEST_METHOD"] == "POST") {
    $result = mysqli_query($conn, "INSERT INTO crud (Firstname, Lastname, Email, Password) VALUES ('$firstname', '$lastname', '$email', '$pass')");
}
    echo('Record Entered Successfully');
}

Source: stackoverflow.com

How to check user already exists in php

$sql = "SELECT username FROM table_name WHERE username='{$username}'";
$result = mysqli_query($con,$sql) or die("Query unsuccessful") ;
      if (mysqli_num_rows($result) > 0) {
        echo "Username is already exist";
      } else {
             ...............   
      }

Similar codes

53 votes245 views6 answers
Laravel run seed
PHP Laravel
0 vote187 views1 answer
Php reload after env
PHP
2 votes171 views1 answer
Read global laravel request()
PHP
2 votes185 views1 answer
Php send when user log in discord webhook
PHP
1 vote200 views2 answers
Laravel generate unique db token
PHP Laravel
0 vote175 views1 answer
Php botman
PHP
0 vote179 views1 answer
Buddy group hide notice join
PHP
15 votes194 views2 answers
Update column value laravel
PHP
2 votes179 views2 answers
Open php.ini in ubuntu
PHP
0 vote168 views1 answer
Laravel load models by id array
PHP