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<?php $var = <<<DATA This is "some data" with some "quoted \"strings" DATA; $expr = '/\s+(?=[^\s]+|"((?:[^"\\\\]|\\\\.)*)")/'; var_dump(preg_split($expr, $var, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE));

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40.9 ms | 402 KiB | 5 Q