CVS文件的导入和导出php类代码

CVS文件的导入和导出php类代码，通过这个自定义的php类可以实现数据库的数据和CVS文件的转换

1. /**
2. * CSV 文件处理类
3. */
4. class Csv{
5. public $csv_array; //csv数组数据
6. public $csv_str; //csv文件数据
8. public function __construct($param_arr, $column){
9. $this->csv_array = $param_arr;
10. $this->path = $path;
11. $this->column = $column;
12. }
14. /**
15. * 导出
16. * */
17. public function export(){
18. if(empty($this->csv_array) || empty($this->column)){
19. return false;
20. }
21. $param_arr = $this->csv_array;
22. unset($this->csv_array);
23. $export_str = implode(',',$param_arr['nav'])."n";
24. unset($param_arr['nav']);
25. //组装数据
26. foreach($param_arr as $k=>$v){
27. foreach($v as $k1=>$v1){
28. $export_str .= implode(',',$v1)."n";
29. }
30. }
31. //将$export_str导出
32. header( "Cache-Control: public" );
33. header( "Pragma: public" );
34. header("Content-type:application/vnd.ms-excel");
35. header("Content-Disposition:attachment;filename=txxx.csv");
36. header('Content-Type:APPLICATION/OCTET-STREAM');
37. ob_start();
38. // $file_str= iconv("utf-8",'gbk',$export_str);
39. ob_end_clean();
40. echo $export_str;
41. }
43. /**
44. * 导入
45. * */
46. public function import($path,$column = 3){
47. $flag = flase;
48. $code = 0;
49. $msg = '未处理';
50. $filesize = 1; //1MB
51. $maxsize = $filesize * 1024 * 1024;
52. $max_column = 1000;
54. //检测文件是否存在
55. if($flag === flase){
56. if(!file_exists($path)){
57. $msg = '文件不存在';
58. $flag = true;
59. }
60. }
61. //检测文件格式
62. if($flag === flase){
63. $ext = preg_replace("/.*.([^.]+)/","$1",$path);
64. if($ext != 'csv'){
65. $msg = '只能导入CSV格式文件';
66. $flag = true;
67. }
68. }
70. //检测文件大小
71. if($flag === flase){
72. if(filesize($path)>$maxsize){
73. $msg = '导入的文件不得超过'.$maxsize.'B文件';
74. $flag = true;
75. }
76. }
78. //读取文件
79. if($flag == flase){
80. $row = 0;
81. $handle = fopen($path,'r');
82. $dataArray = array();
83. while($data = fgetcsv($handle,$max_column,",")){
84. $num = count($data);
85. if($num < $column){
86. $msg = '文件不符合规格真实有：'.$num.'列数据';
87. $flag = true;
88. break;
89. }
91. if($flag === flase){
92. for($i=0;$i<3;$i++){
93. if($row == 0){
94. break;
95. }
96. //组建数据
97. $dataArray[$row][$i] = $data[$i];
98. }
99. }
100. $row++;
101. }
102. }
104. return $dataArray;
105. }
106. }
108. $param_arr = array(
109. 'nav'=>array('用户名','密码','邮箱'),
110. array(0=>array('xiaohai1','123456','xiaohai1@zhongsou.com'),
111. 1=>array('xiaohai2','213456','xiaohai2@zhongsou.com'),
112. 2=>array('xiaohai3','123456','xiaohai3@zhongsou.com')
113. ));
115. $column = 3;
116. $csv = new Csv($param_arr, $column);
117. //$csv->export();
118. $path = 'C:Documents and SettingsAdministratorLocal SettingsTemptxxx.csv';
119. $import_arr = $csv->import($path,3);
120. var_dump($import_arr);
122. ?>