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<?php $re = '/\\\\o\{([^}]+)\}/m'; $str = 'hello \\o{test} how are you?'; $subst = '<span>$1</span>'; echo preg_replace($re, $subst, $str); ?>
Output for git.master, git.master_jit, rfc.property-hooks
hello <span>test</span> how are you?

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