/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

-1 vote404 views1 answer
Laravel edit form select don't repeat a selected value
PHP Laravel
8 votes321 views2 answers
Php string search in array
PHP
4 votes339 views2 answers
Pretty php
PHP
1 vote351 views1 answer
Wordpress if is in categroy
PHP
2 votes367 views2 answers
Laravel get column field name
PHP Laravel
0 vote420 views2 answers
Load session in codeigniter
PHP CodeIgniter
23 votes325 views2 answers
Take 10 character from string using php
PHP
0 vote372 views1 answer
Send parameter to function in php can null
PHP
10 votes350 views3 answers
Php artisan see last migration
PHP
0 vote404 views1 answer
Laravel deploy without moving public directory
PHP Laravel