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<?php $arr = Array ( Array ( 'record_num' => 18152, 'title' => 'Title of post ' ), Array ( 'record_num' => 18150, 'title' => 'Title of post 2' ), Array ( 'record_num' => 18134, 'title' => 'Title of post 3' ), Array ( 'record_num' => 18134, 'title' => 'Title of post 3' ) ); $arr = array_values(array_column($arr, null, 'record_num')); Var_dump($arr);
Output for git.master, git.master_jit, rfc.property-hooks
array(3) { [0]=> array(2) { ["record_num"]=> int(18152) ["title"]=> string(14) "Title of post " } [1]=> array(2) { ["record_num"]=> int(18150) ["title"]=> string(15) "Title of post 2" } [2]=> array(2) { ["record_num"]=> int(18134) ["title"]=> string(15) "Title of post 3" } }

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