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<?php $string = '("one","two","three,subthree","four")'; $string = str_replace(['(', ')'], ['[', ']'], $string); $array = json_decode($string, true); print_r($array);
Output for 7.1.25 - 7.1.32, 7.2.0 - 7.2.33, 7.3.0 - 7.3.33, 7.4.0 - 7.4.33, 8.0.0 - 8.0.30, 8.1.0 - 8.1.28, 8.2.0 - 8.2.19, 8.3.0 - 8.3.7
Array ( [0] => one [1] => two [2] => three,subthree [3] => four )

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