populating multidimensional array from timestamp - php

Question

I have a list of mysql timestamps.
I want to produce an html menu, which has got years as first LI and months as nested LI.
for example:
2012 ->
december,
may,
april.
2011 ->
november,
january.
2010 ->
april,
march,
february.
as you see, I want the menu to be an array of years and within months, just the months (and years) which I have in my database.
It's simple for sure, but I can't realize how to perform this.
I'm querying all my timestamps and cycling them, but then when I have to fill the array I can't manage.

Answer 1

The SQL you want is probably something like this:
SELECT YEAR(date) AS year, MONTH(date) AS month, COUNT(*) AS entries FROM my_table
GROUP BY year,month ORDER BY year ASC, month ASC;
And the code would be:
$previous_year = null;
foreach ($result_rows as $row) {
if ($previous_year == null || $row['year'] != $previous_year) {
if ($previous_year != null) {
echo '</ul>/li>';
}
echo '<li><span class="year">'.$row['year'].'</span><ul>';
$previous_year = $row['year'];
}
echo '<li>'.$row['month'].' ('.$row['entries'].')</li>';
}
if ($previous_year != null) {
echo '</ul></li>';
}
Edit:
Alternative PHP based on another answer, this is tidier:
$grouped = array();
foreach ($result_rows as $row) {
$grouped[$row['year']][$row['month']] = $row;
}
foreach ($grouped as $year => $months) {
echo "<li>$year";
echo "<ul>";
foreach ($months as $month => $row) {
echo "<li>$month (".$row['entries'].")</li>";
}
echo "</ul></li>";
}

Answer 2

Have you tried something like this?
<?php
// this would've been pulled from mysql
$data = array(
array('date' => "2010-11-12 12:34:56", 'some' => 'data'),
array('date' => "2010-12-12 12:34:56", 'some' => 'data'),
array('date' => "2010-12-13 12:34:56", 'some' => 'data'),
array('date' => "2011-01-01 12:34:56", 'some' => 'data'),
);
$grouped = array();
foreach ($data as $row) {
$year = substr($row['date'], 0, 4);
$month = substr($row['date'], 6, 2);
$grouped[$year][$month][] = $row;
}
var_dump($grouped);

Answer 3

You must group your queries using GROUP BY , and use loop in PHP which create suitable structure.

Answer 4

In slight peusdo code.
$r = query(SELECT * FROM TBL_WHATEVER ORDER BY TS ASC);
$last_year = null;
while($row as mysql_fetch_assoc($r)){
$year = date('Y', $r['ts']);
if($year != $last_year){
echo $year;
$last_year = $year;
}else{
$month = 1;
while($month < 12){
echo date('F', $r['ts']);
}
}
}
There are many posts about it like this one:
PHP: Loop through all months in a date range?