connect form page on wordpress with php file - php

Question

I created form on one page in my wordpress:
<form action="scores_send.php" method="post">
<strong>Date: </strong><input type="date" name="date" /><br />
<strong>TEAM 1:</strong>
Player 1.: <input type="text" name="team1_player1" /><br />
Player 2.: <input type="text" name="team1_player2" /><br />
<strong>TEAM 2:</strong>
Player 1.: <input type="text" name="team2_player1" /><br />
Player 2.: <input type="text" name="team2_player2" /><br />
<strong>SCORE:</strong>
Team 1. <input type="number" name="score_team1" min="0" max="5"/> : <input type="number" name="score_team2" min="0" max="5"/> Team 2.<br />
<input type="submit" value="Add" />
</form>
And also I wrote php code which connect to my external (no-wordpress) postgres database (connection parameters in code are not true) and insert information from form to one table:
<?php
$date = $_POST['date'];
$t1p1 = $_POST['team1_player1'];
$t1p2 = $_POST['team1_player2'];
$t2p1 = $_POST['team2_player1'];
$t2p2 = $_POST['team2_player2'];
$score1 = $_POST['score_team1'];
$score2 = $_POST['score_team2'];
if($date and $t1p1 and $t1p2 and $t2p1 and $t2p2 and $score1 and $score2) {
$connection = pg_connect("host=127.0.0.1 port=5432 dbname=scores user=user password=pass")
or die('Brak polaczenia z serwerem PostgreSQL');
$db = #pg_select_db('scores', $connection)
or die('Nie moge polaczyc sie z baza danych');
$team1 = #pg_query("INSERT INTO scores.games (score_team1, score_team2, datetime, team1_player1, team1_player2, team2_player1, team2_player2) VALUES ('$score1', '$score2', '$date', '$t1p1', '$t1p2', '$t2p1', '$t2p2'");
if($team1) echo "Scores added.";
else echo "ERROR! Scores not added";
pg_close($connection);
}
?>
I tried 2 ways:
1. to create template php file in folder of my theme and
2. to paste this code to content editor in wordpress (using this plugin: https://wordpress.org/plugins/insert-php/)
and both ways is not working. I changed part "action" in , but maybe wrong.

Answer 1

Just change your action of your form to : http://yoursite.com/scores_send.php
make sure that your scores_send.php is on the root of your installation.
So, your form look like :
<form action="http://yoursite.com/scores_send.php" method="post">

Answer 2

You should use http://example.com/page-slug/ in form action
Where page-slug is the slug of another page create by make scores_send.php as template.It will post all form value to score_send.php.From where you can proceed further to insert into external DB.
<form action="http://example.com/page-slug/" method="post">