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<?php $str = 'fdfqsdfqsdf%A%2%B%4%C%D%7sddsdfsdf'; $res = preg_replace_callback(',%.?,', function (array $matches) { if (preg_match(',%\d+,', $matches[0])) { return 'FOO'; } }, $str); echo $res; $res = preg_replace_callback(',%\d+?,', function (array $matches) { return 'FOO'; }, $str); echo $res;
Output for git.master, git.master_jit, rfc.property-hooks
fdfqsdfqsdfFOOFOOFOOsddsdfsdffdfqsdfqsdf%AFOO%BFOO%C%DFOOsddsdfsdf

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