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      MyPager  >  All threads  >  mypager.class.php  >  (Un) Subscribe thread alerts  
Summary:number of numeric links on the left and right from current
Author:Raffi Hovhannesian
Date:2006-02-10 12:58:58
Update:2006-03-30 23:41:52

  1. mypager.class.php   Reply  
Picture of Raffi Hovhannesian
Raffi Hovhannesian
2006-02-10 12:58:58
The link_range var is not changing anything when it's default value is changed... as I learned from you class this is supposed to have somethign to do with the number of numeric links on the left and right from the current page's number.


  2. Re: mypager.class.php   Reply  
Picture of Vagharshak Tozalakyan
Vagharshak Tozalakyan
2006-02-13 22:23:14 - In reply to message 1 from Raffi Hovhannesian
:) Just write $pager->links_range instead of $this->links_range. Sorry for a little bug in the sample script.

Here is another example:


$test_array = array();
$total_num = 230;
for ($i=0; $i<$total_num; $i++)
$test_array[$i] = 'Item ' . $i;


$pager = new MyPager(20);
$pager->on_first_last = true;
$pager->on_prev_next = true;
$pager->links_range = 5;
$pager->total = $total_num;

for ($i = $pager->offset; $i < ($pager->offset + $pager->limit) && $i < $total_num; $i++)
echo $test_array[$i] . '<br />';

list($r1, $r2) = $pager->GetRange();
echo "<p>Display $r1-$r2 of " . $pager->total . '</p>';



  3. Re: mypager.class.php   Reply  
Picture of Chris Smith
Chris Smith
2006-03-26 19:32:17 - In reply to message 1 from Raffi Hovhannesian
First, thanks for this class too ! It's simple, small, it was exactly what I need. Although I have modified it some place:

- line 14: I have added a new property (to get more professional class feeling :) ):
var $links_html = null;
- and line 21: $this->links_html = '';
- and line 74,80,87,92,99,105: change the echo to this:
$this->links_html .= .......
- and line 107: return $this->links_html;
- so in line 38: change the method name to: GetLinks()

There was a problem in the class, when a user change the value of the offset by hand (at the address bar) to a value that is greater then the total: in this case there were no displayable records, because the query is based upon the offset value. That's why I have changed the constructor to this:
- line 16: function MyPager($_total, $limit = 10)
- line 19: change to this: $this->total = $_total;
- line 22-29: It wasn't really a problem the condition (beside of the missing total condition), but I prefer that the user do as little harm as possible, so I have modified the condition to this:
if ( ! isset($_GET['offset'])
|| ! ( (string)(int)$_GET['offset'] === (string)$_GET['offset'] && $_GET['offset'] >= 0 )
|| $this->total-1 < $_GET['offset'] )
$this->offset = 0;
else $this->offset = $_GET['offset'];
the difference between the two, if the value of the offset is:
val 1st 2nd
x5 -> 0 0
5a -> 5 0
-5a -> 5 0
+5a -> 5 0
05 -> 5 0

- at last line 125: to have all values in 1 array:
return array($this->offset + 1, $upper, $this->total);

The sample file is only changed some place. The most important thing is that the query in line18-19 must have executed before the instance of the class is constructed.

If you like these changes, feel free to modify your class. If not, no problem :)

With best regards

  4. Re: mypager.class.php   Reply  
Picture of Chris Smith
Chris Smith
2006-03-26 19:37:32 - In reply to message 3 from Chris Smith
In the above message at the "- line 16" row, the correct is:
function MyPager($_total = 0, $limit = 10)

  5. Re: mypager.class.php   Reply  
Picture of Chris Smith
Chris Smith
2006-03-30 23:41:52 - In reply to message 4 from Chris Smith
I have made some modifications again (I think it's now perfect for me):

- line 61-69: I have replaced the url rewriting with preg_replace to this (I think it's faster):
$url = 'http://'.$_SERVER['HTTP_HOST'].$_SERVER['PHP_SELF'] . '?' . preg_replace( '/(&offset)=(\w*)/', '', $_SERVER['QUERY_STRING'] ) . '&amp;';

- in those lines, where you have created the links, I have added a 'title' property to the 'a' tag, which shows the number of page and the number of items on it (for this I have created a variable from the offset count, that you have done), eg at the case of the prev link:
if ($current_page != 1 && $this->on_prev_next) {
$_offset = ($current_page - 2) * $this->limit;
$href = $url . 'offset=' . $_offset;
$this->links_html .= "<li><a href=\"$href\" title=\"Prev page: ".($_offset+1)."-".($_offset+$this->limit)."\">&lt;</a></li> \n";

- and last I have added a new simple method called GetOffset():
* Returns the offset based upon the rank of the element
* @param int $rank the rank of the element
* @return int returns the offset number
function GetOffset(&$rank)
return floor($rank / $this->limit) * $this->limit;

It can be used to reference to an element by id:
In the main script I have selected the rank value of the desired id (of course, after the examination, that the id is still exist), and this method returns the offset, so I can reference a news item by id from the web (or after editing, or when a news item has deleted I have selected the next available id):
eg. the referece-link:
- http://www.filter.lan/index.php?page=news&p=12
and the main script generated link, with the help of this method, is:
- http://www.filter.lan/index.php?page=news&offset=10#p12

Once again: thanks for this great class too, it has many good ideas !