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<?php $words = array( 'John Doe', 'Jane Adams', 'Michael McDonald', 'Jim' ); $initials = implode('/', array_map(function ($name) { return preg_replace('/(?<=\w)./', '', $name); }, $words)); echo $initials;
Output for git.master, git.master_jit, rfc.property-hooks
JD/JA/MM/J

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