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<?php // more than 18 is sufficient $json = '12345123451234512345'; var_dump(json_decode($json)); // a float var_dump(json_decode($json, flags: JSON_BIGINT_AS_STRING)); // a string var_dump(json_encode(json_decode($json, flags: JSON_BIGINT_AS_STRING))); // string(22) ""12345123451234512345"" // with extra ""
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