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<?php $tags = array('Test', 'tests', 'tes', 'abc'); usort($tags, function($a, $b) { return strcasecmp($a, $b); }); var_dump($tags);
Output for git.master, git.master_jit, rfc.property-hooks
array(4) { [0]=> string(3) "abc" [1]=> string(3) "tes" [2]=> string(4) "Test" [3]=> string(5) "tests" }

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