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<?php $array = ['Kale', 'Kaleidoscope', 'Aardvark', 'Apple', 'Leicester', 'Lovely']; usort($array, function($a, $b) { return strcmp($a[0], $b[0]); }); var_dump($array);
Output for git.master, git.master_jit, rfc.property-hooks
array(6) { [0]=> string(8) "Aardvark" [1]=> string(5) "Apple" [2]=> string(4) "Kale" [3]=> string(12) "Kaleidoscope" [4]=> string(9) "Leicester" [5]=> string(6) "Lovely" }

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