cannot connect to MySQL from webpage

I began hosting my website through a service that uses cpanel... I found creating a database, tables etc a headache, and all the worse using phpAdmin. Coding I used when hosting my site on my own machine (Apache2.4, MySQL5.7, PHP7) that worked fine will not work now and I have spent MANY hours trying to figure this out... 2 scripts: someform.html:

A:

B:

C:

D:

E:

F:

G:

someform.php: connect_errno) { echo "Failed to connect to MySQL: " . $mysqli -> connect_error; } else { echo "Here are the results for:
"; } echo $_POST['A'> . ", ", $_POST['B'> . ", ", $_POST['C'> . ", ", $_POST['D'> . ", ", $_POST['E'> . ", ", $_POST['F'> . ", ", $_POST['G'> . "."; $A = $_POST['A'>; $B = $_POST['B'>; $C = $_POST['C'>; $D = $_POST['D'>; $E = $_POST['E'>; $F = $_POST['F'>; $G = $_POST['G'>; /*This is important because... what if there is no combination of AB pairs that exists, your loop will execute infinite*/ $limitNumber = 800; $notFound = true; for($i = 0; ($i < $limitNumber && $notFound); $i++){ for($j = 0; ($j < $limitNumber && $notFound); $j++){ for($k = 0; ($k < $limitNumber && $notFound); $k++){ $sql = "SELECT * FROM numbers where (A=$A AND B=$B AND C=$C) OR ( A=$A AND B=$B AND D=$D) OR ( A=$A AND B=$B AND E=$E) OR ( A=$A AND B=$B AND F=$F) OR ( A=$A AND B=$B AND G=$G) OR ( A=$A AND C=$C AND D=$D) OR ( A=$A AND C=$C AND E=$E) OR ( A=$A AND C=$C AND F=$F) OR ( A=$A AND C=$C AND G=$G) OR ( A=$A AND D=$D AND E=$E) OR ( A=$A AND D=$D AND F=$F) OR ( A=$A AND D=$D AND G=$G) OR ( A=$A AND E=$E AND F=$F) OR ( A=$A AND E=$E AND G=$G) OR ( A=$A AND F=$F AND G=$G) OR ( B=$B AND C=$C AND D=$D) OR ( B=$B AND C=$C AND E=$E) OR ( B=$B AND C=$C AND F=$F) OR ( B=$B AND C=$C AND G=$G) OR ( B=$B AND D=$D AND E=$E) OR ( B=$B AND D=$D AND F=$F) OR ( B=$B AND D=$D AND G=$G) OR ( B=$B AND E=$E AND F=$F) OR ( B=$B AND E=$E AND G=$G) OR ( B=$B AND F=$F AND G=$G) OR ( C=$C AND D=$D AND E=$E) OR ( C=$C AND D=$D AND F=$F) OR ( C=$C AND D=$D AND G=$G) OR ( C=$C AND E=$E AND F=$F) OR ( C=$C AND E=$E AND G=$G) OR ( C=$C AND F=$F AND G=$G) OR ( D=$D AND E=$E AND F=$F) OR ( D=$D AND E=$E AND G=$G) OR ( D=$D AND F=$F AND G=$G) OR ( E=$E AND F=$F AND G=$G)"; if ($result = $mysqli -> query($sql)) { while ($row = $result -> fetch_row()) { echo ""; $notFound = false; break; } } $C++; } $B++; } $A++; } $mysqli -> close(); ?>

A
($row[0])