c: %c
d: %df: %f', 80,80, 80, 80); echo '
'; printf('%0.2f
%+d
%0.2f
', 8, 8, 1235.456); printf('the cost of %d %s at $%0.2f each is $%0.2f.', 4, 'brooms', 8.50, (4*8.50)); echo '
'; $tax = 30; printf('The tax rate is %0.2f%%', $tax);
sprint可以把查询和数据很好的分开代码
Sorting Multidimensional Arrays
1])) {
$parent_id = $_POST['parent_id'];
}
$q = sprintf("INSERT INTO tasks (parent_id, task) VALUES (%d, '%s')", $parent_id, mysqli_real_escape_string($db, strip_tags($_POST['task'])));
$r = mysqli_query($db, $q);
if(mysqli_affected_rows($db) == 1) {
echo '任务添加成功
';
} else {
echo '任务添加失败
';
}
}
?>
$y['parent_id']);
}
usort($tasks, 'parent_sort');
echo '
当前的任务列表
- ';
foreach ($tasks as $task) {
echo "
- {$task['task']} \n"; } echo '
