Verificar se Login e E-mail existe. Deu um pequeno erro, alguém poderi

<?php

//Cadastro Usuário

function Register($name, $email, $username, $password, $status = true){

 

$password = CryptPassword($password);

$userkey = KeyGenerator();

$register = time();

 

$query = "INSERT INTO clientes (name, email, username, password, userkey, register, status)";

$query .= "VALUES ('$name', '$email', '$username', '$password', '$userkey', $register, $status,)";

$result = mysql_query($query) or die(mysql_error());

return $result;

}

//Verifica se Existe Login

function UserNameExists($username){

$query = "SELECT username FROM clientes WHERE username = '$username'";

$result = mysql_query($query) or die (mysql_error());

if(mysql_num_rows($result) <= 0)

return true;

else

return false;

}

//Verifica se Existe E-mail

function EmailExists($email){

$query = "SELECT email FROM clientes WHERE email = '$email'";

$result = mysqli_query($connect, $query) or die (mysql_error()); // LINHA ESTÁ DANDO ERRO

if(mysql_num_rows($result) <= 0)

return true;

else

return false;

}

8

//ABRE conexão com MysSQLI

function Connect(){

$link = @mysqli_connect(HOSTNAME, USERNAME, PASSWORD, DATABASE) or die(mysqli_connect_error());

mysqli_set_charset($link, CHARSET) or die(mysqli_error($link));

 

return $link;

}

//"FECHA conexão com MysSQLI"

function Close($link){

@mysqli_close($link) or die (mysqli_error($link));

}

//"PROTEGE contra SQL Injection"

function Escape($dados){

$link = Connect();

if(!is_array($dados))

$dados = mysqli_real_escape_string($link, $dados);

else{

$arr = $dados;

 

foreach ($arr as $key => $value){

$key = mysqli_real_escape_string($link, $key);

$value = mysqli_real_escape_string($link, $value);

 

$dados[$key] = $value;

}

}

Close($link);

return $dados;

}

//"EXECUTA Querys"

function Execute($query){

$link = Connect();

$result = @mysqli_query($link, $query) or die(mysqli_error($link));

 

Close($link);

return $result;

}

//"LER Registros"

function Read($table, $params = null, $fields = '*'){

$params = ($params) ? " {$params}" : null;

 

$query = "SELECT {$fields} FROM {$table}{$params}";

$result = Execute($query);

if(!mysqli_num_rows($result))

return false;

else {

while ($res = mysqli_fetch_assoc($result)) {

$data[] = $res;

}

 

return $data;

}

}

//"GRAVAR Registros"

function Create($table, array $data){

$table = PREFIX.'_'.$table;

//return $table;

$data = Escape($data);

//return $data;

 

$fields = implode(', ', array_keys($data));

$values = "'".implode("', '", $data)."'";

 

$query = "INSERT INTO {$table} ( {$fields} ) VALUES ({$values})";

return Execute($query);

 

}

?>