3v4l.org

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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) );

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