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PHP 分頁(yè)類(模仿google)-面試題目解答

更新時(shí)間：2009年09月13日 22:08:26 作者：

今天去XX公司面試了，感覺(jué)很不理想。因?yàn)檫@一段時(shí)間都在加深Zend Framework，都沒(méi)練習(xí)常用函數(shù)和方法了。

筆試回答的不太好，特別是JS部分，也是許久都沒(méi)復(fù)習(xí)的原因。
上機(jī)題目是要寫(xiě)一個(gè)仿google分頁(yè)的類，當(dāng)要取類似9/2的最大整數(shù)，卻怎么也想不起函數(shù)ceil的名字，暈了半天。
最后測(cè)試程序沒(méi)錯(cuò)誤，但是就是不能正常顯示，后來(lái)（回家后）一查才知道是語(yǔ)句：for($i=0;$i++;$i<9)寫(xiě)錯(cuò)了，于是下決心重新寫(xiě)一遍，于是就有了下面的代碼了：

復(fù)制代碼代碼如下:

 
<?php 
/* 
顯示樣式如下： 
[1] 2 3 4 5 6 7 8 9 10 ...100 下頁(yè) 尾頁(yè) 
首頁(yè) 上頁(yè) 1..12 13 14 15 [16] 17 18 19 20 ...100 下頁(yè) 尾頁(yè) 
首頁(yè) 上頁(yè) 1..92 93 94 95 96 97 98 [99] 100 

使用方法： 
$currentPage = $_GET['page']?$_GET['page']:1; 
$pagediv = new pagediv(500, 10, 11, $currentPage, 'test.php?page='); 
$pagediv->show(); 

*/ 
class pagediv 
{ 
public $part1; 
public $part2; 
public $part3; 
public $part4; 
public $part5; 

/* 
對(duì)下面的分頁(yè)顯示進(jìn)行分割: 
首頁(yè) 上頁(yè) 1..12 13 14 15 [16] 17 18 19 20 ...100 下頁(yè) 尾頁(yè) 
$part1 : 首頁(yè) 上頁(yè) 
$part2 : 1.. 
$part3 : 12 13 14 15 [16] 17 18 19 20 
$part4 : ...100 
$part5 : 下頁(yè) 尾頁(yè) 
*/ 

public $allPage; //總頁(yè)數(shù) 
public $allRocords; //總記錄數(shù) 
public $perPage; //每頁(yè)記錄數(shù) 
public $showPagesNo; //顯示分頁(yè)欄的總頁(yè)碼數(shù) 顯示樣式里共有11個(gè) 
public $currentPage; //當(dāng)前頁(yè) 
public $urlModel; //Url鏈接樣式 

public $startHidden; //出現(xiàn) 1... 時(shí)的頁(yè)數(shù) 開(kāi)始隱藏中間頁(yè) 
public $endHidden; //出現(xiàn) ...100 時(shí)的頁(yè)數(shù) 結(jié)束隱藏中間頁(yè) 

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++; 
} 
//沒(méi)有想起ceil時(shí)的候補(bǔ)方案 
return $_int; 
} 

public function getPart1(){ 
$content = '<a href="'.$this->getUrl(1).'">首頁(yè)</a>&nbsp;<a href="'.$this->getUrl('pre').'">上頁(yè)</a>&nbsp;'; 
if($this->currentPage <= $this->startHidden){ 
$content = ''; 
} 
return $content; 
} 

public function getPart2(){ 
$content = '<a href="'.$this->getUrl(1).'">1</a>&nbsp;'; 
$add = ''; 
if($this->currentPage > $this->startHidden){ 
$add = '...'; 
} 
if($this->currentPage == 1){ 
$content = '[1]&nbsp;'; 
$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 下頁(yè) 尾頁(yè) 
$long = $this->showPagesNo - 2; 
for($i=0;$i<$long;$i++){ 
$j = $i+2; 
if($j == $this->currentPage){ 
$content .= '['.$this->currentPage.']&nbsp;'; 
}else{ 
$content .= '<a href="'.$this->getUrl($j).'">'.$j.'</a>&nbsp;'; 
} 

} 

}elseif( $this->currentPage >= $this->endHidden ){ 
//首頁(yè) 上頁(yè) 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.']&nbsp;'; 
}else{ 
$content .= '<a href="'.$this->getUrl($j).'">'.$j.'</a>&nbsp;'; 
} 
} 
}else{ 
//首頁(yè) 上頁(yè) 1..12 13 14 15 [16] 17 18 19 20 ...100 下頁(yè) 尾頁(yè) 
$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.']&nbsp;'; 
}else{ 
$content .= '<a href="'.$this->getUrl($j).'">'.$j.'</a>&nbsp;'; 
} 
} 
} 
$part3 = $content; 
return $part3; 
} 

public function getPart4(){ 
$content = '<a href="'.$this->getUrl().'">'.$this->allPage.'</a>&nbsp;'; 
$add = ''; 
if($this->currentPage < $this->endHidden){ 
$add = '...'; 
} 
if($this->currentPage == $this->allPage){ 
$content = '['.$this->allPage.']'; 
$add = ''; 
} 
$part4 = $add.$content; 
return $part4; 

} 

public function getPart5(){ 
$content = '<a href="'.$this->getUrl('next').'">下頁(yè)</a>&nbsp;<a href="'.$this->getUrl().'">尾頁(yè)</a>'; 
if($this->currentPage >= $this->endHidden){ 
$content = ''; 
} 
return $content; 
} 

public function show(){ 
//判斷非法 
if(!is_numeric($this->currentPage) || $this->currentPage < 0 || $this->currentPage > $this->allPage){ 
print 'error:pageNo is flase'; 
return; 
} 
//總頁(yè)數(shù)沒(méi)有達(dá)到顯示分頁(yè)欄的總頁(yè)碼數(shù)，則全部顯示 
if($this->allPage < $this->showPagesNo){ 
$long = $this->allPage; 
for($i=0;$i<$long;$i++){ 
$j = $i+1; 
if($j == $this->currentPage){ 
$content .= '['.$this->currentPage.']&nbsp;'; 
}else{ 
$content .= '<a href="'.$this->getUrl($j).'">'.$j.'</a>&nbsp;'; 
} 

} 
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; 
} 
} 
?> 