php method to implement paging of two different tables: 1. Create a PHP sample file; 2. Implement it through "function getPage($a, $b, $page, $page_size){...}" Just paginate across tables.
#php How to realize paging of two different tables?
PHP cross-table pagingIt is more suitable when the data in the two tables is relatively balanced<?php function getPage($a, $b, $page, $page_size){ sort($a); sort($b); $total_a = count($a); $total_b = count($b); $averge = floor($page*$page_size/2); $a_f = array_slice($a, $averge, $page_size); # 升序序列 first $b_f = array_slice($b, $averge, $page_size); # 升序序列 $a_f_len = count($a_f); $b_f_len = count($b_f); $min_a = $a_f[0] ?? null; $min_b = $b_f[0] ?? null; $max_a = $a_f[$a_f_len-1] ?? null; $max_b = $b_f[$b_f_len-1] ?? null; if (empty($a_f)) { $min = $min_b; $a_s = getRangeInfo($a, $min_b, $max_a); $offset = count($a_s)+ ($averge-$total_a); } if (empty($b_f)) { $min = $min_a; $b_s = getRangeInfo($a, $min_a, $max_b); $offset = count($b_s)+ ($averge-$total_b); } if (!empty($a_f) && !empty($b_f)) { $min = min([$min_a, $min_b]); if($min_a > $min_b || empty($b_f)) # b组数据小 重新查询a组 { # 查出偏移量 # 第二次查询 second $a_s = getRangeInfo($a, $min, $max_a); # second 第二次查找 # 求出新查出的数据与最开始查出a数组相差个数 $offset = count($a_s)-$a_f_len; } else { # a组数据小 重新查询b组 # 查出偏移量 $b_s = getRangeInfo($b, $min, $max_b); # 求出新查出的数据与最开始查出a数组相差个数 $offset = count($b_s)-$b_f_len; } } $now_position = $show = (int)($averge*2-$offset); $start_position = $page*$page_size; $end_position = ($page+1)*$page_size-1; // 假如一次查询某数组为空,查询的第二组数据未能涵盖所需全部数据,故重新查询 $a_s = getlimit($a, $min, $start_position-$now_position+$page_size); $b_s = getlimit($b, $min, $start_position-$now_position+$page_size); $total_arr = array_merge($a_s, $b_s) ; sort( $total_arr); # 升序排列 $res = []; foreach ($total_arr as $k=>$v) { if ($now_position > $end_position) { break; } if ($now_position < $start_position){ $now_position = $now_position+1; continue; } $now_position = $now_position+1; $res[] = $v; } // 思路如下: $min_str = $min_a > $min_b ? ' 最小数在b, 重新获取a数据'.json_encode($a_s):'最小数在a, 重新获取b数据'.json_encode($b_s); print_r('数组$a:'.json_encode($a)); echo '<br>'; print_r('数组$b:'.json_encode($b)); echo '<br>'; print_r('平均数floor is '.$averge.', $a 最小值是 '.$min_a.',$b 最小值是 '.$min_b.', 对比之后得出最小值是'.$min.','.$min_str. '此时偏移量'.$offset.', 最小数'.$min.'处于位置'.$show.', 我需要'.$start_position.'到'.$end_position.'的数据, 查出所需数据为'.json_encode($total_arr).', 结果为'.json_encode($res)); return $res;}// 按值范围获取function getRangeInfo ($array, $start_value, $end_value){ sort($array); $res = []; foreach ($array as $k => $v) { if ($v >= $start_value && $v <= $end_value){ $res[] = $v; } } return $res;}// 按起始位置个数获取function getlimit ($array, $start_value, $num){ sort($array); $res = []; foreach ($array as $k => $v) { if ($num<=0) { break; } if ($v >= $start_value){ $res[] = $v; $num --; } } return $res;}$b = [1];$a = [2,3,1,4,5,6,7,8,9,10,12,14];$page = 2; # 第一页$page_size = 5;$list = getPage($a, $b, $page, $page_size);$all = array_merge($a, $b);sort($all);echo '<br>';echo '<br>';echo '<br>';$start_position = $page*$page_size;$real = array_slice($all, $start_position, $page_size);print_r('合并总数据'.json_encode($all).',一页'.$page_size.'条, 第'.(string)($page+1).'页数据为:'.json_encode($real));
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