PHP pagination class (imitate Google)-interview topics Answer _php tips

The written answer is not very good, especially the JS part, but also for a long time did not review the reason.
On the machine is to write a copy of Google pagination class, when to take a similar 9/2 of the largest integer, but how can not think of functions Ceil name, dizzy for half a day.
The final test program is not wrong, but is not normal display, later (after going home) a check to know is the statement: for ($i =0; $i + +; $i <9) wrote wrong, so determined to rewrite it, so there is the following code:

Copy Code code as follows:

<?php
/*
The display style is as follows:
[1] 2 3 4 5 6 7 8 9 ... 100 Next Last Page
First prev 1..12 13 14 15 [16] 17 18 19 20 ... 100 Next Last Page
First Prev 1..92 93 94 95 96 97 98 [99] 100

How to use:
$currentPage = $_get[' page ']?$_get[' page ']:1;
$pagediv = new Pagediv (A, $currentPage, ' test.php?page= ');
$pagediv->show ();

*/
Class Pagediv
{
Public $part 1;
Public $part 2;
Public $part 3;
Public $part 4;
Public $part 5;

/*
Split the following paging display:
First prev 1..12 13 14 15 [16] 17 18 19 20 ... 100 Next Last Page
$part 1: Home prev
$part 2:1.
$part 3:12 13 14 15 [16] 17 18 19 20
$part 4:. 100
$part 5: Next Last
*/

Public $allPage; Total pages
Public $allRocords; Total number of records
Public $perPage; Number of records per page
Public $showPagesNo; Displays the total number of pages in the page bar there are 11 display styles
Public $currentPage; Current page
Public $urlModel; URL link Style

Public $startHidden; Appeared 1 ... When the number of pages begins to hide the middle page
Public $endHidden; Appear... Number of pages at 100 End Hide Middle page

Public function __construct ($allRocords, $perPage, $showPagesNo, $currentPage, $urlModel) {
$this->allrocords = $allRocords;
$this->perpage = $perPage;
$this->showpagesno = $showPagesNo;
$this->currentpage = $currentPage;
$this->urlmodel = $urlModel;
$this->allpage = $this->getallpage ();

$this->starthidden = $this->getint ($this->showpagesno)/2); 6
$this->endhidden = $this->allpage-$this->starthidden; 94
}

Public Function getUrl ($_index = ') {
$_current = $_index;
if ($_index = = ' pre ') $_current = $this->currentpage-1;
if ($_index = = ' Next ') $_current = $this->currentpage+1;
if ($_index = = ") $_current = $this->allpage;
return $this->urlmodel.$_current;
}

Public Function Getallpage () {
return $this->getint ($this->allrocords/$this->perpage);
}

Public Function GetInt ($_float) {
$_int = $_float;
if ($_index = Strpos ($_float, '. ') = = True) {
$_int = substr ($_float,0,$_index);
$_int++;
}
I didn't think of Ceil when I was waiting.
return $_int;
}

Public Function GetPart1 () {
$content = ' <a href= '. $this->geturl (1). ' " > Home </a> <a href= "'. $this->geturl (' pre ')." > Prev </a> ';
if ($this->currentpage <= $this->starthidden) {
$content = ';
}
return $content;
}

Public Function GetPart2 () {
$content = ' <a href= '. $this->geturl (1). ' " >1</a> ';
$add = ';
if ($this->currentpage > $this->starthidden) {
$add = ' ... ';
}
if ($this->currentpage = = 1) {
$content = ' [1] ';
$add = ';
}
$part 2 = $content. $add;
return $part 2;
}

Public Function GetPart3 () {
$content = ';
if ($this->currentpage <= $this->starthidden) {
[1] 2 3 4 5 6 7 8 9 ... 100 Next Last Page
$long = $this->showpagesno-2;
for ($i =0; $i < $long; $i + +) {
$j = $i +2;
if ($j = = $this->currentpage) {
$content. = ' ['. $this->currentpage. '] ';
}else{
$content. = ' <a href= '. $this->geturl ($j). ' " > '. $j. ' </a> ';
}

}

}elseif ($this->currentpage >= $this->endhidden) {
First Prev 1..92 93 94 95 96 97 98 [99] 100
$long = $this->showpagesno-2;
$_start = $this->allpage-$long;
for ($i =0; $i < $long; $i + +) {
$j = $_start + $i;
if ($j = = $this->currentpage) {
$content. = ' ['. $this->currentpage. '] ';
}else{
$content. = ' <a href= '. $this->geturl ($j). ' " > '. $j. ' </a> ';
}
}
}else{
First prev 1..12 13 14 15 [16] 17 18 19 20 ... 100 Next Last Page
$long = $this->showpagesno-2;
$offset = $this->getint ($long/2)-1;
$_start = $this->currentpage-$offset;
for ($i =0; $i < $long; $i + +) {
$j = $_start + $i;
if ($j = = $this->currentpage) {
$content. = ' ['. $this->currentpage. '] ';
}else{
$content. = ' <a href= '. $this->geturl ($j). ' " > '. $j. ' </a> ';
}
}
}
$part 3 = $content;
return $part 3;
}

Public Function GetPart4 () {
$content = ' <a href= '. $this->geturl (). ' " > '. $this->allpage. ' </a> ';
$add = ';
if ($this->currentpage < $this->endhidden) {
$add = ' ... ';
}
if ($this->currentpage = = $this->allpage) {
$content = ' [; $this->allpage. '] ';
$add = ';
}
$part 4 = $add. $content;
return $part 4;

}

Public Function GetPart5 () {
$content = ' <a href= '. $this->geturl (' Next '). " > next page </a> <a href= "'. $this->geturl (). '" > Last </a> ';
if ($this->currentpage >= $this->endhidden) {
$content = ';
}
return $content;
}

Public function Show () {
Judged illegal
if (!is_numeric ($this->currentpage) | | $this->currentpage < 0 | | $this->currentpage > $this->allpage) {
print ' Error:pageno is flase ';
Return
}
The total number of pages does not reach the total number of pages that display the page bar, all display
if ($this->allpage < $this->showpagesno) {
$long = $this->allpage;
for ($i =0; $i < $long; $i + +) {
$j = $i +1;
if ($j = = $this->currentpage) {
$content. = ' ['. $this->currentpage. '] ';
}else{
$content. = ' <a href= '. $this->geturl ($j). ' " > '. $j. ' </a> ';
}

}
Print $content;
Return
}
$this->part1 = $this->getpart1 ();
$this->part2 = $this->getpart2 ();
$this->part3 = $this->getpart3 ();
$this->part4 = $this->getpart4 ();
$this->part5 = $this->getpart5 ();

Print $this->part1. $this->part2. $this->part3. $this->part4. $this->part5;
}
}
?>