3v4l.org

run code in 300+ PHP versions simultaneously
<?php $tempoutput = "abc\r\nxyz"; var_dump( $tempoutput, bin2hex($tempoutput), str_replace("\r\n","\\x0d\\x0a",$tempoutput) );
Output for 7.1.25 - 7.1.28, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.18, 8.3.0 - 8.3.7
string(8) "abc xyz" string(16) "6162630d0a78797a" string(14) "abc\x0d\x0axyz"
preferences:
159.14 ms | 403 KiB | 164 Q