php数组排序几个程序实例

function selectSort($arr,$style)
             {
                 $temp=0;
                 for($i=0;$i<count($arr)-1;$i++)
                 {
                     for($j=$i+1;$j<count($arr);$j++)
                     {
                         if($style=='bts') $op=$arr[$i]<$arr[$j];
                         else if($style=='stb') $op=$arr[$i]>$arr[$j];
                         if($op)
                         {
                             $temp=$arr[$i];
                             $arr[$i]=$arr[$j];
                             $arr[$j]=$temp;
                         }
                     }
                 }
                 foreach ($arr as $key => $value)
                 {
                     echo $value.',';   
                 }
             }
             $arr1=array(21.5,33,90,7,-4,5,55,11);
             selectSort($arr1,'stb');

function maoPao($arr,$style)    {
                 $temp=0;
                 for($i=0;$i<count($arr)-1;$i++)
                 {
                     for($j=0;$j<count($arr)-1-$i;$j++)
                     {
                         if($style=='bts') $op=$arr[$j]<$arr[$j+1];
                         else if($style=='stb') $op=$arr[$j]>$arr[$j+1];
                         if($op)
                         {
                             $temp=$arr[$j];
                             $arr[$j]=$arr[$j+1];
                             $arr[$j+1]=$temp;
                         }
                     }
                 }
                 foreach ($arr as $key => $value)
                 {
                     echo $value.',';   
                 }
             }
             $arr1=array(101,101,-9,-8,0,76,1,57,43,90,23,-56);
             maoPao($arr1,'stb');//small to big

function insertSort($arr,$style)
             {
                 $temp=0;
                 for($i=1;$i<count($arr);$i++)
                 {
                     for($j=0;$j<$i;$j++)
                     {
                         if($style=='bts') $op=$arr[$j]<$arr[$i];
                         else if($style=='stb') $op=$arr[$j]>$arr[$i];
                         if($op)
                         {
                             $temp=$arr[$j];
                             $arr[$j]=$arr[$i];
                             $arr[$i]=$temp;
                         }
                     }
                 }
                 foreach ($arr as $key => $value)
                 {
                     echo $value.',';   
                 }
             }
             $arr1=array(4,7,0,-7,1,14,5);
             insertSort($arr1,'bts');

<?php

$file = 'monkey.gif';

if (file_exists($file)) {

header('Content-Description: File Transfer');

header('Content-Type: application/octet-stream');

header('Content-Disposition: attachment; filename='.basename($file));

header('Content-Transfer-Encoding: binary');

header('Expires: 0');

header('Cache-Control: must-revalidate, post-check=0, pre-check=0');

header('Pragma: public');

header('Content-Length: ' . filesize($file));

ob_clean();

flush();

readfile($file);

exit;

}

?>

<?php

public function fddAction()

{

// get attachment location

$attachment_location = $_SERVER["DOCUMENT_ROOT"] . "/pdf/fdd/sample.pdf";

if (file_exists($attachment_location)) {

// attachment exists

// send open pdf dialog to user

header('Cache-Control: public'); // needed for i.e.

header('Content-Type: application/pdf');

header('Content-Disposition: inline; filename="sample.pdf"');

readfile($attachment_location);

die(); // stop execution of further script because we are only outputting the pdf

} else {

die('Error: File not found.');

}

}

?>

array("a","b","c","d","e","f","g")

$arr = array_slice($arr, 0, 3);

<?php
$arr = array("a"=>"a1","b"=>'b1',"c"=>"a2","d"=>"a1");
$arr1 = array_flip($arr);
print_r($arr1);//先反转一次,去掉重复值,输出Array ( [a1] => d [b1] => b [a2] => c )
$arr2 = array_flip($arr);
print_r($arr2);//再反转回来,得到去重后的数组,输出Array ( [a1] => d [b1] => b [a2] => c )
$arr3 = array_unique($arr);
print_r($arr3);//利用php的array_unique函数去重,输出Array ( [a] => a1 [b] => b1 [c] => a2 )
?>

<?php
$arr = array('a','b','c','d');
unset($arr[1]);
print_r($arr);
?>

<?php
include_once('PHPExcel.php');
//read excel file;
$PHPExcel = new PHPExcel();    
$PHPReader = new PHPExcel_Reader_Excel5();
$PHPExcel = $PHPReader->load('/home/yuanjianjun/taobao_cat.xls');
$currentSheet = $PHPExcel->getSheet(0);
$allColumn = $currentSheet->getHighestColumn();
$allRow = $currentSheet->getHighestRow();
for($currentRow = 1; $currentRow<=$allRow; $currentRow++){
   for($currentColumn='A'; $currentColumn<=$allColumn; $currentColumn++){  
    $address = $currentColumn.$currentRow;  
    echo $currentSheet->getCell($address)->getValue()."t";  
   }
   echo "n";
}

//write excel file
$objExcel = new PHPExcel();
$objWriter = new PHPExcel_Writer_Excel5($objExcel);
$objProps = $objExcel->getProperties();  
$objProps->setCreator("yuan");
$objProps->setLastModifiedBy("yuan");
$objProps->setTitle("excel test");  
$objProps->setSubject("my excel test");
$objProps->setDescription("hello world.");  
$objProps->setKeywords("PHPExcel");
$objProps->setCategory("EXCEL");
$objExcel->setActiveSheetIndex(0);
$objActSheet = $objExcel->getActiveSheet();
$objActSheet->setTitle('TEST1');
$objActSheet->setCellValue('A1', '字符串内容');
$objActSheet->setCellValue('A2', 26);
$objActSheet->setCellValue('A3', true);
$objActSheet->setCellValue('A4', '=A2+A2');
$objWriter->save('/home/yuanjianjun/helloworld.xls');  

//copy excel format
$objReader = PHPExcel_IOFactory::createReader('Excel5');
$objPHPExcel = $objReader->load('/home/yuanjianjun/20100301.xls');
$objWriter = PHPExcel_IOFactory::createWriter($objPHPExcel, 'Excel5');
$objWriter->_phpExcel->setActiveSheetIndex(0);
$objWriter->_phpExcel->getActiveSheet()->setCellValue('A1', 'FESDF');
$objWriter->_phpExcel->getActiveSheet()->setCellValue('B1', 'S');
$objWriter->_phpExcel->getActiveSheet()->setCellValue('C1', 'FEFSD');
$objWriter->_phpExcel->getActiveSheet()->setCellValue('D1', 'SDFD');
$objWriter->_phpExcel->getActiveSheet()->setCellValue('E1', '淘宝CPS');
$objWriter->save('/home/yuanjianjun/copy.xls');