3v4l.org

run code in 500+ 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 - 8.2.31, 8.3.0 - 8.3.31, 8.4.1 - 8.4.22, 8.5.0 - 8.5.8
"James said hello\n Test\n Test two\n" --- "James\r\n said\n hello\n Test\n Test two\n"
preferences:
91.48 ms | 1280 KiB | 4 Q