3v4l.org

run code in 300+ PHP versions simultaneously
<?php $string = "James said hello\n\n\n\n Test\n Test two\n\n"; echo json_encode( preg_replace("/\n{2,}/", "\n", $string) ); echo "\n---\n"; $string = "James\r\n said\n\r\n hello\r\n\r\n\r\n Test\n Test two\n\n"; echo json_encode( preg_replace("/\R{2,}/", PHP_EOL, $string) );
Output for 7.4.0 - 7.4.33, 8.0.1 - 8.0.30, 8.1.0 - 8.1.34, 8.2.0 - 8.2.30, 8.3.0 - 8.3.30, 8.4.1 - 8.4.18, 8.5.0 - 8.5.3
"James said hello\n Test\n Test two\n" --- "James\r\n said\n hello\n Test\n Test two\n"
preferences:
104.75 ms | 1254 KiB | 4 Q