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Functions of a paginal conclusion in PHP

Hello dear readers, today it would be desirable will discuss a problem of a paginal conclusion in PHP and to result possible{probable} ways of the decision. In this clause{article} I shall result rather unique function from the point of view of its{her} opportunities.

Often at creation of dynamic sites (there are no pages as such) on a database or on files there is a question on a paginal conclusion of the information be - that clauses{articles}, archive of news or that nibud` another containing dovl`no a plenty of pages.

Therefore we begin (if we shall not think or somebody will not help) to ransack on the Internet in searches of the necessary code, but a decent paginal conclusion to find hardly. So we shall try to make today that nibud` good, and the main thing working.

Below the code of the elementary function of a paginal conclusion will be resulted, this function can be used on small sites. All comments will be resulted in the function, I think you will understand.

/*Prostejshaja Function of a paginal conclusion, nazavjom her it is simple PagePrint*/

function PagePrint ($start, $count) {

$HrefPage = "; //----we Create a variable which will contain a paginal conclusion

$number=10; //----Quantity{Amount} of recordings on page

/*Podschityvaem Quantity{Amount} of pages, where $count - total of recordings, $number - quantity{amount} of recordings on stranice*/

$CountPage = (int) (($count + $ number-1) / $number);

/*Perebiraem In a cycle all stranicy*/

for ($link=1; $link <= $CountPage; $link ++):

$PageStart = ($ link - 1) * $number; //----we Consider a point of sample of a database

$HrefPage = $ HrefPage. " <a href = ".getenv (' PHP_SELF '). "? start = ". $ PageStart. " target = _ parent> ". $link. " </a> "; // - we Form links

endfor;

return $HrefPage;

}

You see, that function has two entrance parameters $start - a point of sample of a database and $count - quantity{amount} of the data, in a file or in a database. This function the most simple so on it{her} there is not enough hope at use on large sites where a lot of information.

Let's consider more complex function, but having there is more than functionality.

function PagePrint ($variable) {

global $beginPage, $endPage; //------It is declared the global variables responsible for the link to first and last page

$href = "; //-----Peremmennaja containing in itself a paginal conclusion

$separator = ' '; //-----the Variable specifying a separator between links, by default a blank

$style ='style = "text-decoration:none" style = "color:orange" style = "font-weight:bold" '; //-------Sets style of the current page

$stylePage ='style = "text-decoration:none" style = "color:blue" style = "font-weight:bold" '; //------Sets style of the link to first and last page

if (is_array ($variable)): //------we Check type array

*ESUSn¿UbS¼ the file also is appropriated{given} $number - quantity{amount} of recordings, $start - a point of extraction, $pageCount - quantity{amount} of recordings, $andere - other properties of the link, $class - style for links, $showLink - quantity{amount} of links on page

list ($number, $start, $pageCount, $andere, $class, $showLink) = $variable;

*DnUbnbFHHub¼ $start

if (empty ($start) **! is_int ($start) **! is_numeric ($start)) $start=0;

else $start = $ start;

*DnUbnbFHHubS¼ $number

if (empty ($number) **! is_int ($number) **! is_numeric ($number)) $number=10;

else $number = $ number;

$page = (($start/10) +1); //-------Rasschityvavem number{room} of page

$count=ceil ($pageCount / $ number); //------Quantity{Amount} of pages

*jHHu«s sslyki on first and last pages

if ($count! == 1):

$beginPage = " <a href = "".getenv (' PHP_SELF '). "? start=0 ". $andere. "" ". $stylePage. "> perv </a> "; //--------the First page

$endPage = " <a href = "".getenv (' PHP_SELF '). "? start = ". (($count-1) *10). $andere. "" ". $stylePage. "> posl </a> "; //-----Last page

else: FALSE;

endif;

if ($pageCount == 10): return False;

else:

*E«JAFUb¡¿ju¡HH® a conclusion

$begin = $ page - intval ($showLink/2); //------Defines{Determines} number{room} of page with which to deduce{remove}

for ($j=0; $j <= $showLink; $j ++):

$i = $ begin + $ j; //------Number{Room} of page

*zb``¿``bSF the script if $ <0, will increase until then while $showPage=1

if ($i <1):

$showLink ++;

continue;

endif;

*E«JAFUb¡¿ju¡HH® a conclusion

if ($i> $count) break; //-----Protection if quantity{amount} $i> possible{probable} recordings

if ($i == $page) $href = $ href. " <a ". $style. ">". $i. " </a> "; //------the Conclusion of the current page

else $href = $ href. " <a href = "".getenv (' PHP_SELF '). "? start = ". (($i - 1) *10). $andere. "" ". $class. ">". $ i. " </a> "; //------the Conclusion of the following pages

endfor;

return $href;

endif;

}

Entrance parameter of function is the file from six elements:

? $number - quantity{amount} of displayed messages on page

? $start - a point of extraction from a database, t.e number{room} of the message with which begins zivlechenie the data

? $pageCount - total of recordings, t.e how much all is contained with base of recordings

? $andere - other parameters of the link, whether it be new variables or something else

? $class - the given parameter sets appearance of links, t.e links to pages

? $showLink - quantity{amount} of links on page

The first parameter can be transferred{handed} through a method $ _GET [' number '], only in the event that you want that the user could change quantity{amount} of messages on page.

The second parameter is necessarily passed in a file by a method $ _GET [' start '] as parameter $start all time varies when the user clicks under the link to page.

If, you suddenly do not want, to pass the first, third, fourth, fifth element of a file instead of them it is necessary to pass emptiness - ", without a blank between inverted commas.

As you can see function strongly expands opportunities at creation of a paginal conclusion. Now you can place the paginal conclusion to a small site of page, adjusting quantity{amount} of displayed links in parameter $showLink. All this is convenient at creation gallerej, search under the catalogue of a site or something else.

Below examples of a call of function will be resulted:

PagePrint (", $ _GET [' start '], 90, ", ", 10) - All recordings in base 90, the paginal conclusion will display on ten links

PagePrint ($ _GET [' number '], $ _GET [' start '], 90, ", ", 10) - All recordings in base 90, the paginal conclusion will display on ten links and there is an opportunity to change quantity{amount} of displayed recordings on page

PagePrint ($ _GET [' number '], $ _GET [' start '], 90, ' *category=1 ', ", 10) - All recordings in base 90, a paginal conclusion will display on ten links, is an opportunity to change quantity{amount} of displayed recordings on page and the link passes an additional variable category with value 1

PagePrint ($ _GET [' number '], $ _GET [' start '], 90, ' *category=1 ',' style = "color:black" ', 10) - All recordings in base 90, a paginal conclusion will display on ten links, is an opportunity to change quantity{amount} of displayed recordings on page, the link passes an additional variable category with value 1 and links to page will be black color.

I hope the explanations resulted below and comments inside function will help to understand to you with a principle of job of function.

For those who wants to see a code, instead of page in interente swing PagePrint. Success in studying!