/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

0 vote123 views1 answer
Phplinit config
PHP
40 votes130 views4 answers
Php erase element from array
PHP
0 vote175 views1 answer
Laravel 8 - get values of url query strings in controller
PHP Laravel
0 vote141 views1 answer
Laravel count by date
PHP
0 vote147 views1 answer
Create if not exist laravel
PHP Laravel
3 votes136 views5 answers
Implode and explode in php
PHP
1 vote156 views2 answers
Laravel eloquent multiple join
PHP Laravel
-3 votes125 views2 answers
Unset session key
PHP
0 vote148 views1 answer
How to take last entry in database in laravel Method Two
PHP
0 vote149 views1 answer
Laravel override eloquent all function
PHP Laravel