php fputcsv() 函数csv数据读写数据库文件代码

php教程 fputcsv() 函数csv数据读写数据库教程文件代码

fputcsv() 函数用于将数据格式为csv格式，以便写入文件或者数据库。

1.将字符串写入csv文件中

    $test_array = array(
        array("111","sdfsd","sdds","43344","rrrr"),
        array("sssssssss","gdfgfd","232323","wwewe","dsfds"),
        array("fgfg","e4343","dsfds","w2332","xcvxc"),
        array("11212","2323","344343","344343","rerreer"),
        array("fds","43344444","33333333","ttttttt","gggggggggggg"),
        array("kdfs","dsfdsfds","wewewe","sdsdddddddd","wwwwwwwwwww")
    );
   
    $file = fopen("test.csv","w") or die("Can't Open test.csv");
    foreach($test_array as $line_array)
    {
        $isSuccess = fputcsv($file,$line_array);
        print $isSuccess."<br>";

　　　　　if($isSuccess===false)
        {
            die("Can't write csv line".$line_array);
        }
    }
    fclose($file) or die("Can't close file test.csv.");

fputcsv()函数返回所写入行的字符的个数或者false，当写入失败时返回false。

2.将格式化的csv字符串保存到字符串中。

$test_array = array(
        array("111","sdfsd","sdds","43344","rrrr"),
        array("sssssssss","gdfgfd","232323","wwewe","dsfds"),
        array("fgfg","e4343","dsfds","w2332","xcvxc"),
        array("11212","2323","344343","344343","rerreer"),
        array("fds","43344444","33333333","ttttttt","gggggggggggg"),
        array("kdfs","dsfdsfds","wewewe","sdsdddddddd","wwwwwwwwwww")
    );
    ob_start();
    $file = fopen("php://output","w") or die("Can't Open php://output");
    foreach($test_array as $line_array)
    {
        $isSuccess = fputcsv($file,$line_array);
        if($isSuccess===false)
        {
            die("Can't write csv line".$line_array);
        }
    }
   
    fclose($file) or die("Can't close file test.csv.");
    $result = ob_get_contents();
    ob_end_clean();

以用fgetcsv(file,length,separator,enclosure)函数读取csv文件。

fgetcsv的参数说明如下：

file：需要读取的csv文件，此参数是必需的。

length：表示大于csv文件中最长的行的长度的值。php5之前是必需参数。在php5中是可选参数，如果不设置此参数或者将其设为0，php将会读取

一整行的数据。如果行的长度超过8192个字节时，应该将length值设定一个数，而不是让php自动去计算行的长度。

separator：指定数据的分隔符，默认是逗号，如果指定为“；”，那么fgetcsv函数将按照“；”来解析行数据。

fgetcsv的返回值：

根据file的一行数据，返回一个数组。如果读取文件出错，则返回false。到达文件尾部时，也返回false。

下面是一个读取test.csv文件的例子。

$file = fopen('test.csv','r') or die("Can't open file test.csv");
    $color="#ff0000";
    print '<table border=0>';
    while($csv_line=fgetcsv($file))
    {
        print "<tr>";
        $len = count($csv_line);
        for($i=0;$i<$len;$i++)
        {
            if($i%2==0)$color="#cccccc";
            else $color="#999999";
            print '<td bgcolor='.$color.'>'.htmlentities($csv_line[$i]).'</td>';
        }
        print "</tr>";
    }
    print '</table>';
    fclose($file) or die("Can't close file test.csv!");