How does the PHP comment reply to infinite pole nesting be implemented? Have written the basic code, look forward to expert doubts

Problem:

Here are 3 layers of nested comments, parent=0 for a first-level comment, parent=3 to indicate that the parent comment has an ID of 3

$comments = Array (    ' id ' = '        3 ',        ' parent ' = ' 0 '    ),    array (        ' id ' = ' 9 ',        ' PA Rent ' = ' 0 '    ),    array (        ' id ' = ' 1 ',        ' parent ' = ' 3 '    ),    array (        ' id ' = ' 2 ', '        Parent ' = ' 3 '    ),    array (        ' id ' = ' 5 ',        ' parent ' = ' 1 '    )    ,    Array ( c22/> ' id ' = ' 7 ',        ' parent ' = ' 1 '    );

The stupidest way to achieve the effect I want

$sub = Array (), foreach ($comments as $a) {    if ($a [' parent '] = = 0) {        foreach ($comments as $b) {            if ($b [' Paren T '] = = $a [' id ']) {                foreach ($comments as $c) {                    if ($c [' parent '] = = $b [' id ']) {                        $b [' Children '] [] = $c;                    }                }                $a [' children '] [] = $b;            }        }        $sub [] = $a;    }} Echo ' <pre> ';p rint_r ($sub);

The print is the effect I want, the sub-comment as a sub-array of the parent comment, but as I write this can not be nested multi-layered comments, infinite pole nesting to do so?
Thank you for asking for help!

Solution:

Is it possible to understand the problem of infinite classification?

Infinite class Classification $list = Array (' ID ' =>1, ' fid ' =>0, ' title ' = ' China '), array (' ID ' =>2, ' fid ' = 1, ' title ' = ' Jiangsu '), array (' ID ' =>3, ' fid ' =>1, ' title ' = ' Anhui '), array (' ID ' =>4, ' fid ' =>8, ' Title ' = ' Jiangyin '), array (' ID ' =>5, ' fid ' =>3, ' title ' = ' Wuhu '), array (' ID ' =>6, ' fid ' =>3, ' titl     E ' = ' + ' Hefei '), array (' ID ' =>7, ' fid ' =>3, ' title ' = ' Bengbu '),);    $new = Array ();    foreach ($list as $v) {$new [$v [' fid ']][] = $v;    } $i = 0;    $j = 0;    $a = true;    $p [$i] = 0;    $q [$j] = $i;        while ($a) {$next = false;        $i = $q [$j];        $var = $new [$i];        if (!isset ($p [$i])) {$p [$i] = 0;        if ($p [$i] = = count ($var)) {echo ' </ul> ';                 }else{for ($k = $p [$i]; $k <count ($var); $k + +) {if ($k = = 0) echo ' <ul> ';                Echo ' <li> ' $var [$k] [title ']; $p [$i]++;                    if (Isset ($new [$var [$k] [' ID ']]) {$i = $var [$k] [' id '];                    $j + +;                    $q [$j] = $i;                    $next = true;                Break                } echo ' </li> ';                if ($k = = count ($var)-1) {echo ' </ul> ';        }}} if ($next) {continue;        } $j--;        if ($j < 0) {break; }} exit;

Related articles:

PHP Comment Reply Solution

Use the PHP wireless level to implement the comment reply function in categories

Using JS to achieve the perfect imitation QQ space comment reply effect

