Warning: Undefined variable $conexion in /home/ostandarditspero/public_html/informatica_ingles.php on line 4

Fatal error: Uncaught TypeError: mysqli_query(): Argument #1 ($mysql) must be of type mysqli, null given in /home/ostandarditspero/public_html/informatica_ingles.php:4 Stack trace: #0 /home/ostandarditspero/public_html/informatica_ingles.php(4): mysqli_query(NULL, 'SELECT * FROM t...') #1 {main} thrown in /home/ostandarditspero/public_html/informatica_ingles.php on line 4