PHP paging (imitating google)-interview question answering _ php skills

I went to XX for an interview today, and it was not ideal. Because ZendFramework has been deepened for a while, and common functions and methods have not been practiced. The answer to the written test is not very good, especially for the JS part, which is why I haven't reviewed it for a long time.
On the machine, the question is to write a class similar to google paging. when we want to take the maximum integer similar to 9/2, we can't remember the name of the function ceil, and we have been dizzy for a long time.
Finally, the test program is not wrong, but it cannot be displayed normally. later (after going home), I checked the statement: for ($ I = 0; $ I ++; $ I <9) was wrong, so I decided to write it again, so I had the following code:

The code is as follows:

/*
The display style is as follows:
[1] 2 3 4 5 6 7 8 9 10... 100 Last Page
Home Page 1... 12 13 14 15 [16] 17 18 19 20... 100 at the end of the next page
Home Page 1 .. 92 93 94 95 96 97 98 [99] 100

Usage:
$ CurrentPage = $ _ GET ['Page']? $ _ GET ['Page']: 1;
$ Pagep = new pagep (500, 10, 11, $ currentPage, 'Test. php? Page = ');
$ Pagep-> show ();

*/
Class pagep
{
Public $ part1;
Public $ part2;
Public $ part3;
Public $ part4;
Public $ part5;

/*
Split the following page display:
Home Page 1... 12 13 14 15 [16] 17 18 19 20... 100 at the end of the next page
$ Part1: Homepage
$ Part2: 1 ..
$ Part3: 12 13 14 15 [16] 17 18 19 20
$ Part4: .. 100
$ Part5: Next page
*/

Public $ allPage; // The total number of pages.
Public $ allRocords; // The total number of records.
Public $ perPage; // number of records per page
Public $ showPagesNo; // displays the total number of page numbers in the pagination bar. There are a total of 11 display styles.
Public $ currentPage; // current page
Public $ urlModel; // Url link style

Public $ startHidden; // when the page number of 1... appears, the middle page is hidden.
Public $ endHidden; // hide the middle page at the end of the page when... 100 is displayed

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 ++;
}
// No alternative plan for ceil
Return $ _ int;
}

Public function getPart1 (){
$ Content = 'geturl (1). '"> homepage getUrl ('Pre').'"> previous page ';
If ($ this-> currentPage <= $ this-> startHidden ){
$ Content = '';
}
Return $ content;
}

Public function getPart2 (){
$ Content = 'geturl (1). '"> 1 ';
$ Add = '';
If ($ this-> currentPage> $ this-> startHidden ){
$ Add = '...';
}
If ($ this-> currentPage = 1 ){
$ Content = '[1]';
$ Add = '';
}
$ Part2 = $ content. $ add;
Return $ part2;
}

Public function getPart3 (){
$ Content = '';
If ($ this-> currentPage <= $ this-> startHidden ){
// [1] 2 3 4 5 6 7 8 9 10... 100 Last Page
$ Long = $ this-> showPagesNo-2;
For ($ I = 0; $ I <$ long; $ I ++ ){
$ J = $ I + 2;
If ($ j = $ this-> currentPage ){
$ Content. = '['. $ this-> currentPage. ']';
} Else {
$ Content. = 'geturl ($ j). '">'. $ j .'';
}

}

} Elseif ($ this-> currentPage >=$ this-> endHidden ){
// On the homepage, 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. = 'geturl ($ j). '">'. $ j .'';
}
}
} Else {
// The last page of the home page 1... 12 13 14 15 [16] 17 18 19 20... 100
$ 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. = 'geturl ($ j). '">'. $ j .'';
}
}
}
$ Part3 = $ content;
Return $ part3;
}

Public function getPart4 (){
$ Content = 'geturl (). '">'. $ this-> allPage .'';
$ Add = '';
If ($ this-> currentPage <$ this-> endHidden ){
$ Add = '...';
}
If ($ this-> currentPage ==$ this-> allPage ){
$ Content = '['. $ this-> allPage. ']';
$ Add = '';
}
$ Part4 = $ add. $ content;
Return $ part4;

}

Public function getPart5 (){
$ Content = 'geturl ('next'). '"> getUrl ().'"> last page ';
If ($ this-> currentPage >=$ this-> endHidden ){
$ Content = '';
}
Return $ content;
}

Public function show (){
// Illegal judgment
If (! Is_numeric ($ this-> currentPage) | $ this-> currentPage <0 | $ this-> currentPage> $ this-> allPage ){
Print 'Error: pageNo is flase ';
Return;
}
// If the total number of pages does not reach the total number of pages displayed on the page bar, all are displayed.
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. = 'geturl ($ j). '">'. $ j .'';
}

}
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;
}
}
?>