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<?php $str = "oAA34Ao#\\\\oo+--)o/"; preg_replace_callback( '/([\x00-\x1F\*\(\)\\\\])/', function ($matches) { print_r($matches); $x = "\\".join("", unpack("H2", $matches[1])); echo $x; return $x; }, $str ); $str = " oAA34Ao#\\\\oo+--)o/"; function matches($matches) { print_r($matches); $x = "\\".join("", unpack("H2", $matches[1])); echo $x; return $x; } mb_ereg_replace_callback( '([\x00-\x1F\*\(\)\\\\])', "matches", $str ); ?>
Output for git.master, git.master_jit, rfc.property-hooks
Array ( [0] => \ [1] => \ ) \5cArray ( [0] => \ [1] => \ ) \5cArray ( [0] => ) [1] => ) ) \29Array ( [0] => \ [1] => \ ) \5cArray ( [0] => \ [1] => \ ) \5cArray ( [0] => ) [1] => ) ) \29

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