Description:
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there is no class method of mysqli_report, actually the only way with OOP it's with mysql_driver class :

$driver = new mysqli_driver();
$driver->report_mode = MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_STRICT;

maybe make a static version is a good way :
mysqli_driver::report(MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_STRICT);

or :
$mysqli = new mysqli('...');
$mysqli->report(MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_STRICT);


or get mysqli driver instance :
$mysqli = new mysqli('...');
$mysqli->driver->report_mode = MYSQLI_REPORT_ALL & ~MYSQLI_REPORT_STRICT;