php array数组生成csv文件

<?php  
$data = array(  
    array( 'row_1_col_1', 'row_1_col_2', 'row_1_col_3' ),  
    array( 'row_2_col_1', 'row_2_col_2', 'row_2_col_3' ),  
    array( 'row_3_col_1', 'row_3_col_2', 'row_3_col_3' ),  
);  
$filename = "example";  
header("Content-type: text/csv");  
header("Content-Disposition: attachment; filename={$filename}.csv");  
header("Pragma: no-cache");  
header("Expires: 0"); 
outputCSV($data);

function outputCSV($data) {  
    $outputBuffer = fopen("php://output", 'w');  
    foreach($data as $val) {  
    foreach ($val as $key => $val2) {  
     $val[$key] = iconv('utf-8', 'gbk', $val2);// CSV的Excel支持GBK编码，一定要转换，否则乱码  
     }  
        fputcsv($outputBuffer, $val);  
    }  
    fclose($outputBuffer);  
}

<?php 
/** by www.phprm.com */ 
$row = 1; 
$handle = fopen("file.csv","r"); 
//fgetcsv() 解析读入的行并找出 CSV格式的字段然后返回一个包含这些字段的数组。  
while ($data = fgetcsv($handle, 1000, ",")) { 
$num = count($data); 
echo "<p> $num fields in line $row: <br>\n"; 
$row++; 
for ($c=0; $c < $num; $c++) { 
    //注意中文乱码问题 
    $data[$c]=iconv("gbk", "utf-8//IGNORE",$data[$c]);   
        echo $data[$c] . "<br>\n"; 
    } 
} 
fclose($handle);