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<?php $a = [ 'net_sec1' => 'a', 'net_sec2' => 'b', 'net_sec3' => 'c', 'ss_ks_kw' => 'a', ]; $aa = preg_grep('/^net_sec(\d*)$/', $a); var_dump($aa);
Output for git.master, git.master_jit, rfc.property-hooks
array(0) { }

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