当我将记录从csv文件插入MySQL表时,它还会插入一个空白行,其他行是另一条记录的最后一行。
这是我的代码:
<?php
$connect = mysql_connect('localhost','root','root');
if (!$connect) {
die('Could not connect to MySQL: ' . mysql_error());
}
$cid =mysql_select_db('bizin490_devcredit',$connect);
define('CSV_PATH', '/home/ubc/Documents/');
$csv_file = CSV_PATH . "test.csv";
$csvfile = fopen($csv_file, 'r');
$theData = fgetcsv($csvfile);
$i = 0;
while (!feof($csvfile)) {
$csv_data[] = fgets($csvfile, 1024);
$csv_array = explode(",", $csv_data[$i]);
$insert_csv = array();
$insert_csv['name'] = $csv_array[0];
$insert_csv['email'] = $csv_array[1];
$query = mysql_query("select name from test where name='" . $insert_csv['name'] . "'");
$count = mysql_num_rows($query);
if ($count == 0) {
$query = "INSERT INTO test(name,email)VALUES('" . $insert_csv['name'] . "','" . $insert_csv['email'] ."')";
$n = mysql_query($query, $connect);
} else {
$sql = "update test set email='".$insert_csv['email']."'";
$qu = mysql_query($sql);
}
$i++;
}
fclose($csvfile);
echo "File data successfully imported to database!!";
mysql_close($connect);
?>
效率不是很高,但添加一个条件
if ($insert_csv['name'] !== '' && $insert_csv['email']!=='') //since != '' will return true if you pass is numeric 0 and a few other cases, hence using !==
{
$query = mysql_query("select name from test where name='" . $insert_csv['name'] . "'");
$count = mysql_num_rows($query);
if ($count == 0) {
$query = "INSERT INTO test(name,email)VALUES('" . $insert_csv['name'] . "','" . $insert_csv['email'] ."')";
$n = mysql_query($query, $connect);
} else {
$sql = "update test set email='".$insert_csv['email']."'";
$qu = mysql_query($sql);
}
}
使用 SplFileObject,您可以告诉它忽略空行,并自动将文件作为 CSV 文件处理
$file = new SplFileObject($csv_file);
$file->setFlags(SplFileObject::READ_CSV | SplFileObject::SKIP_EMPTY);
foreach ($file as $csv_array) {
...
}
此代码中可能存在缺陷:
$csvfile = fopen($csv_file, 'r'); // opens the file
$theData = fgetcsv($csvfile); // reads first line
$i = 0;
while (!feof($csvfile)) { // checks for eof
$csv_data[] = fgets($csvfile, 1024); // reads next line
- 如果没有标题,则跳过第一行。
-
feof
在读取最后一行后false
。fgets
不检查上一次'n
背后是否有数据,所以feof
是假的。 然后fgets
读取"空"行,直到错误添加eof
。
改变:
// checks for eof and errors
while ( ($csv_data[] = fgets($csvfile, 1024)) !== false) {
...
}