Php parent class and subclass read data code

The php parent class and subclass read data code is a second-level classification program code. this program can find the child class data based on the parent data. the code is as follows :? Phpfunctiongetsubcomments ($ paren... the php parent class and subclass read data code is a second-level classification program code, which can find the child class data based on the parent data, the code is as follows:

 Setquery ($ SQL); $ rows = $ db-> loadobjectlist (); $ list = array (); // Obtain the record set from the data first, and then add a level to the record, parent level = 0, its lower level = 1, and so on foreach ($ rows as $ row) {$ row-> level = $ level; $ list [] = $ row; $ tmparr = getsubcomments ($ row-> id, $ level + 1); // recursively call if (count ($ tmparr )) {foreach ($ tmparr as $ tmprow) {$ list [] = $ tmprow ;}}return $ list ;}$ list = array (); foreach ($ tmplist as $ row) {$ row-> level = 0; $ list [] = $ row; $ tmplist2 = getsubcomments ($ row-> id, 1 ); foreach ($ tmplist2 as $ row2) {$ list [] = $ row2 ;}// output content hierarchically by level if ($ row-> level) {$ pre = ''; for ($ n = 0; $ n <$ row-> level; $ n ++) $ pre. = '----'; echo $ pre. '|-';} echo strip_tags ($ row-> content );

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