<meta charset="utf-8">Current To-Do List <body><?php function make_list($parent) { global $tasks; echo ''; foreach($parent as $task_id => $todo) { echo "
'; } $db = mysqli_connect('192.168.31.172' ,'root', 'root', 'phpadvanced'); mysqli_query($db, "set names utf8"); $q = 'SELECT task_id, parent_id, task FROM tasks WHERE date_completed="0000-00-00 00:00:00" ORDER BY parent_id, date_added ASC'; $r = mysqli_query($db, $q); $tasks = array();while (list($task_id, $parent_id, $task) = mysqli_fetch_array($r, MYSQLI_NUM)) { $tasks[$parent_id][$task_id] = $task;}//echo '- $todo"; if (isset($tasks[$task_id])) { // 如果当前id有子任务则递归创建菜单 make_list($tasks[$task_id]); } echo "
"; } echo ''.print_r($tasks,1).'';make_list($tasks[0]); //把包含顶级任务的数组发送给它, 最顶级的parent_id是0?>
<?php// create the array.// Array structs// StudentId = > ["name" => "Name", "grade" => xx.x];$students = [ 256 => ['name' => 'Jon', 'grade' => '98.5'], 2 => ['name' => 'Vance', 'grade' => '85.1'], 9 => ['name' => 'Stephen', 'grade' => '94.0'], 364 => ['name' => 'Steve', 'grade' => '85.1'], 68 => ['name' => 'Rob', 'grade' => '74.6'],];function name_sort($x, $y) { static $count = 1; echo "Iteration $count: {$x['name']} vs. {$y['name']}
\n"; $count ++; return strcasecmp($x['name'], $y['name']);}function grade_sort($x, $y) { static $count = 1; echo "Iteration $count: {$x['grade']} vs. {$y['grade']}
\n"; $count++; return $x['grade']<?php// create the array.// Array structs// StudentId = > ["name" => "Name", "grade" => xx.x];$students = [ 256 => ['name' => 'Jon', 'grade' => '98.5'], 2 => ['name' => 'Vance', 'grade' => '85.1'], 9 => ['name' => 'Step%本文@来源gao@!dai!ma.com搞$$代^@码!网搞代gaodaima码hen', 'grade' => '94.0'], 364 => ['name' => 'Steve', 'grade' => '85.1'], 68 => ['name' => 'Rob', 'grade' => '74.6'],];echo print_r($students, 1);uasort($students, function($x, $y){ return strcasecmp($x['name'], $y['name']);}); //保持键并使用自定义排序echo print_r($students, 1);uasort($students, function($x, $y){ return $x['grade']<?phpfunction increment(&$i) { $i++;}$num = 2;increment($num);echo $num;?>以上就介绍了php递归,静态变量,匿名函数使用，包括了方面的内容，希望对PHP教程有兴趣的朋友有所帮助。
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