Warning: file(x.txt): failed to open stream: No such file or directory in G:\PleskVhosts\thaiabc.com\httpdocs\php\test03.php on line 5

Fatal error: Uncaught Error: Call to undefined function x() in G:\PleskVhosts\thaiabc.com\httpdocs\php\test03.php:6 Stack trace: #0 {main} thrown in G:\PleskVhosts\thaiabc.com\httpdocs\php\test03.php on line 6