如何解决PHP分页问题
| 因此出于某种原因，我试图找出为什么我的分页无法正常工作的原因。我将其从第1页移至第2页，但由于某种原因它不会转到第3页。我检查了看数据库中的查询是否正确，因此不确定我要去哪里。$per_page = \'4\';
$tenure_sql = \'SELECT COUNT(id) as count
FROM people.bywu
WHERE type <> 0
AND status = \"approved\"\';
$tenure_query = mysql_query( $tenure_sql,DB );
$tenure_count = mysql_fetch_object( $tenure_query );
$tenure_count = $tenure_count -> count;
$tenure_pages = ceil( $tenure_count / $per_page );
<div class=\"pagination\" id=\"tenure_pages\">
<a href=\"\" class=\"lt grayed\"><</a>
Stories <span id=\"tenure_low\" class=\"current_low\"><?= $tenure_count ? \'1\':\'0\' ?></span>-<span id=\"tenure_high\" class=\"current_high\"><?= $tenure_count > 4 ? $per_page : $tenure_count ?></span> of <span class=\"total\"><?= $tenure_count ?></span>
<a href=\"\" class=\"gt<?= $tenure_count < 5 ? \' grayed\':\'\' ?>\">></a>
<span class=\"pages\" style=\"display:none;\"><?= $tenure_pages ?></span>
<?
for( $i = 1; $i < $tenure_pages + 1; $i++ )
{
echo \'<a href=\"\">\' . $i . \'</a> \';
} // for
?>
解决方法
放弃了kohana分页类，如果您了解有关php类的任何基础知识，我认为您会发现它很有用。
用法：
$pager = Pagination::factory(array(\'current_page\' => $_GET[\'page\'],\'total_items\' => $total_items,\'items_per_page\' => 20));
if ($pager->next_page) { /* etc.......*/ }
<?php
class Pagination {
protected $config = array(
\'current_page\' => 1,\'total_items\' => 0,\'items_per_page\' => 10
);
// Current page number
protected $current_page;
// Total item count
protected $total_items;
// How many items to show per page
protected $items_per_page;
// Total page count
protected $total_pages;
// Item offset for the first item displayed on the current page
protected $current_first_item;
// Item offset for the last item displayed on the current page
protected $current_last_item;
// Previous page number; FALSE if the current page is the first one
protected $previous_page;
// Next page number; FALSE if the current page is the last one
protected $next_page;
// First page number; FALSE if the current page is the first one
protected $first_page;
// Last page number; FALSE if the current page is the last one
protected $last_page;
// Query offset
protected $offset;
/**
* Creates a new Pagination object.
*
* @param array configuration
* @return Pagination
*/
public static function factory(array $config = array())
{
return new Pagination($config);
}
/**
* Creates a new Pagination object.
*
* @param array configuration
* @return void
*/
public function __construct(array $config = array())
{
// Pagination setup
$this->setup($config);
}
/**
* Loads configuration settings into the object and (re)calculates pagination if needed.
* Allows you to update config settings after a Pagination object has been constructed.
*
* @param array configuration
* @return object Pagination
*/
public function setup(array $config = array())
{
// Only (re)calculate pagination when needed
if ($this->current_page === NULL
OR isset($config[\'current_page\'])
OR isset($config[\'total_items\'])
OR isset($config[\'items_per_page\']))
{
// Calculate and clean all pagination variables
$this->current_page = (int) $this->config[\'current_page\'];
$this->total_items = (int) max(0,$this->config[\'total_items\']);
$this->items_per_page = (int) max(1,$this->config[\'items_per_page\']);
$this->total_pages = (int) ceil($this->total_items / $this->items_per_page);
$this->current_page = (int) min(max(1,$this->current_page),max(1,$this->total_pages));
$this->current_first_item = (int) min((($this->current_page - 1) * $this->items_per_page) + 1,$this->total_items);
$this->current_last_item = (int) min($this->current_first_item + $this->items_per_page - 1,$this->total_items);
$this->previous_page = ($this->current_page > 1) ? $this->current_page - 1 : FALSE;
$this->next_page = ($this->current_page < $this->total_pages) ? $this->current_page + 1 : FALSE;
$this->first_page = ($this->current_page === 1) ? FALSE : 1;
$this->last_page = ($this->current_page >= $this->total_pages) ? FALSE : $this->total_pages;
$this->offset = (int) (($this->current_page - 1) * $this->items_per_page);
}
// Chainable method
return $this;
}
/**
* Returns a Pagination property.
*
* @param string property name
* @return mixed Pagination property; NULL if not found
*/
public function __get($key)
{
return isset($this->$key) ? $this->$key : NULL;
}
/**
* Updates a single config setting,and recalculates pagination if needed.
*
* @param string config key
* @param mixed config value
* @return void
*/
public function __set($key,$value)
{
$this->setup(array($key => $value));
}
} // End Pagination
?>
count()
9
3
ceil(0/4) -> 0
...
ceil(8/4) -> 2
ceil(9/4) -> 3
$total_pages = 8;
$current_page = $_GET[\'curPage\'];
for ($i = 1; $i <= $total_pages; $i++) {
$class = ($i == $current_page) ? \' class=\"current\"\' : \'\';
echo <<<EOL
<a href=\"page.php?curPage=$i\"$class>$i</a>
EOL;
}
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