/PHP/Php check if user exists in database

Php check if user exists in database

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

Php check if user exists in database

$q = mysql_query("SELECT username FROM User WHERE username=$username", $cnn); if (mysql_num_rows($q) != 0) { echo "Username exists"; } else { echo "Write your code here"; }

Similar codes

4 votes279 views4 answers
How to add an array into an associative array in php
PHP
1 vote299 views2 answers
Get database name laravel
PHP Laravel
6 votes240 views4 answers
Laravel force delete
PHP
0 vote279 views1 answer
Snactum laravel
PHP Laravel
9 votes242 views3 answers
Php string ends with
PHP
6 votes215 views6 answers
Access json object in php
PHP
1 vote249 views1 answer
Php single quote vs double quote
PHP
0 vote228 views1 answer
Yen to php
PHP
2 votes241 views1 answer
Php.ini settings
PHP
21 votes278 views6 answers
Php print array
PHP