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<?php $s = '\0025cf'; print $s; var_dump($s); $s = '\\0025cf'; print $s; var_dump($s);
Output for 4.3.0 - 5.6.28, hhvm-3.10.0 - 3.12.0, 7.0.0 - 7.1.0
\0025cfstring(7) "\0025cf" \0025cfstring(7) "\0025cf"