php使用fputcsv()函数csv文件读写数据的方法

本文实例讲述了php使用fputcsv()函数csv文件读写数据的方法。分享给大家供大家参考。具体分析如下：

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,代码如下:

$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,代码如下:

$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!");

希望本文所述对大家的php程序设计有所帮助。