PHP Universal pagination Class code, imitation Goolge page style

/** * * Generic PHP paging class. (Imitation Google style) * * Simply provide two parameters for the total number of records and the number of displays per page. (Detailed usage instructions are attached.) * * No URL is specified and the link is generated by the program. Facilitates the retrieval of results by paging. * * The form is submitted with the Get method, which guarantees that the URL parameters are not lost when operations such as queries, deletions, and so on. **/ Class pager{ IE Address Bar address var $url; Record total number of bars var $countall; Total pages var $page; Pagination Digital Link var $thestr; Home page, Previous link var $backstr; Last page, Next link var $nextstr; Current page number var $pg; Show number of records per page var $countlist; Page Flip Style var $style; constructor, which executes the function automatically when instantiating the class function Pager ($countall, $countlist, $style = "page") { Number of records and the number of display per page can not be a whole, the page after the remainder plus 1 $this->countall = $countall; $this->countlist = $countlist; $this->style= $style; if ($this->countall% $this->countlist!=0) { $this->page=sprintf ("%d", $this->countall/$this->countlist) +1; }else{ $this->page= $this->countall/$this->countlist; } $this->pg=$_get["PG"]; Ensure that the PG starts from page 1th without specifying the case if (!ereg ("^[1-9][0-9]*$", $this->pg) | | empty ($this->PG)) { $this->pg=1; } The page number exceeds the maximum range and takes the maximum value if ($this->pg> $this->page) { $this->pg= $this->page; } Gets the current URL. See the bottom of the function entity for specific implementations $this->url = Pager::geturl (); Replace the wrong format with the correct page number if (Isset ($_get["PG"]) && $_get["PG"]!= $this->PG) { $this->url=str_replace ("? pg=". $_get["PG"], "? pg= $this->pg", $this->url); $this->url=str_replace ("&pg=". $_get["PG"], "&pg= $this->pg", $this->url); } Generates pagination in digital form 12345. if ($this->page<=10) { for ($i =1; $i < $this->page+1; $i +) { $this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this->PG); } }else{ if ($this->pg<=5) { for ($i =1; $i <10; $i + +) { $this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this->PG); } }else{ if (6+ $this->pg<= $this->page) { for ($i = $this->pg-4; $i < $this->pg+6; $i + +) { $this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this->PG); } }else{ for ($i = $this->pg-4; $i < $this->page+1; $i + +) { $this->thestr= $this->thestr. PAGER::MAKEPG ($i, $this->PG); } } } } Generate text links on the next page of the previous page $this->backstr = pager::gotoback ($this->pg); $this->nextstr = Pager::gotonext ($this->pg, $this->page); Echo ("Total". $this->countall. "Bar, per page". $this->countlist. " Bar, Total ". $this->page." Page ". $this->backstr. $this->thestr. $this->nextstr); } Auxiliary functions to generate digital paging function Makepg ($i, $PG) { if ($i = = $PG) { return "style." > ". $i."; }else{ Return "url,5, $i)." class= ". $this->style." >". $i."; } } A function that generates information such as the previous page function Gotoback ($PG) { if ($pg -1>0) { return $this->gotoback= "url,3,0". "class=". $this->style. "' > Home url,2,0). "class=". $this->style. "' > Previous page "; }else{ return $this->gotoback= " first prev"; } } A function to generate information such as the next page function GoToNext ($PG, $page) { if ($pg < $page) { Return "url,1,0". "class=". $this->style. " > next page url,4,0). "class=". $this->style. "' > Last "; }else{ Return " next page last "; } } bbs.it-home.org Handles $PG methods in URLs for automatic generation of pg=x function Replacepg ($url, $flag, $i) { if ($flag = = 1) { $temp _PG = $this->pg; Return Str_replace ("pg=". $temp _pg, "pg=". $this->pg+1), $url); }else if ($flag = = 2) { $temp _PG = $this->pg; Return Str_replace ("pg=". $temp _pg, "pg=". $this->pg-1), $url); }else if ($flag = = 3) { $temp _PG = $this->pg; Return Str_replace ("pg=". $temp _pg, "pg=1", $url); }else if ($flag = = 4) { $temp _PG = $this->pg; Return Str_replace ("pg=". $temp _pg, "pg=". $this->page, $url); }else if ($flag = = 5) { $temp _PG = $this->pg; Return Str_replace ("pg=". $temp _pg, "pg=". $i, $url); }else{ return $url; } } How to get the current URL function GetUrl () { $url = "http://". $_server["Http_host"]; if (Isset ($_server["Request_uri")) { $url. =$_server["Request_uri"]; }else{ $url. =$_server["Php_self"]; if (!empty ($_server["query_string")) { $url. = "?". $_server["Query_string"]; } } Add the Pg=x Word to the current URL if (!ereg ("(pg=| pg=|pg=| pg=) ", $url)) { if (!strpos ($url, "?")) { $url = $url. "? Pg=1 "; }else{ $url = $url. " &pg=1 "; } } return $url; } } ?> Copy Code

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