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<?php $str = "[[1500000000,2823.43,2848,2827.86,2847.68,526.4426911499979]]"; $arr = []; preg_replace_callback('/\[(.*?)\]/', function($m) use (&$arr){ $arr[] = explode(',',preg_replace('/([\w]+)/', "$1", $m[1])); }, $str); $arr2 = []; preg_replace_callback('/\[(.*?)\]/', function($m) use (&$arr2){ $arr2[] = explode(',',preg_replace('/([\w]+)/', "$1", $m[1])); }, $str); print_r($arr2);
Output for 5.6.0 - 5.6.40, 7.0.0 - 7.0.33, 7.1.0 - 7.1.33, 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 - 8.2.18, 8.3.0 - 8.3.7
Array ( [0] => Array ( [0] => [1500000000 [1] => 2823.43 [2] => 2848 [3] => 2827.86 [4] => 2847.68 [5] => 526.4426911499979 ) )

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