3v4l.org

run code in 150+ php & hhvm versions
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<?php echo preg_replace('|\R|', '<$0>', "aa\rbb\r\ncc\nddd\n\r");
based on 8SEbK
Output for 4.4.6 - 4.4.9, 5.2.2 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
aa< >bb< >cc< >ddd< >< >
Output for 4.3.0 - 4.4.5, 5.0.0 - 5.2.1
aa bb cc ddd