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<?php $array = [ "value.inside.array", "val-2.of.array", ".var2.in.arr", "dot.notation.", "value. dot", "consecutive....dots", "a.b.c.d.e.f" ]; var_export( preg_grep('~^[^.\s]+(?:\.[^.\s]+)+$~', $array) );
Output for git.master_jit, git.master, rfc.property-hooks
array ( 0 => 'value.inside.array', 1 => 'val-2.of.array', 6 => 'a.b.c.d.e.f', )

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