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<?php echo( preg_replace_callback( '~\[admin(.+?)\[/admin\]~is', function($m) { return '[admin' . strtr($m[1], array("\n" => '&#13;', ' ' => ' &#32;')) . '[/admin]'; }, '[admin]test[/admin]' ) );
Output for git.master, git.master_jit, rfc.property-hooks
[admin]test[/admin]

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