php - No PostgreSQL link opened yet -

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i completly new databases , trying make simple query postgresql database. problem don't understand how things work. in index.php 

$dbconn = pg_connect("host=myhost port=5432 dbname=mydbname user=myuser password=mypass sslmode=require options='--client_encoding=utf8'") or die('could not connect: ' . pg_last_error());

and connected database. when try query myphp.php 

$query = "insert public.account_recover_users values ($mykey,$email,$name)"; $result = pg_query($query);

i error in title description. proper way connect database can access other files index.php well?

p.s. $mykey,$email,$name 3 variables containing key (randomly-generated), email , name.


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