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THIS SECTION INCLUDE IN EVERY PAGES
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include "dataaccessclassphp";
include "config.inc.php";
$var = new DataAccessLayer(DB_SERVER, DB_USER, DB_PASS, DB_DATABASE);

$var->connect();

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SELECT
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$select = $var->select('table name');
$rr = $var->fetch_array($select);

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INSERT
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$parameters = array("Field_name"=>"Field value","Field_name"=>"Field value","Field_name"=>"Field value");
$var->$insert('table_name',$parameters);

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UPDATE
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$parameters = array("Field_name"=>"Field value","Field_name"=>"Field value","Field_name"=>"Field value");
$var->updateById('table_name',$parameters,'id_name','id_value');

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DELETE
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$var->deleteById('table_name','id_name','id_value');