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<?php $attribute = ''; $split = preg_split('#(.*)\s?(<=>|<=|>=|<>|<|>|!=|=)#Ui', $attribute, -1, PREG_SPLIT_NO_EMPTY | PREG_SPLIT_DELIM_CAPTURE); print_r($split);

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39.04 ms | 402 KiB | 5 Q