php - PHP 脚本中的 MySQL_Query 错误

Question

我的目标是循环遍历目录中的所有 .CSV 文件并为每个文件运行此脚本，以便将数据附加到数据库中。问题源于我在下面插入循环时。我已经编译了一个 PHP 脚本，在将单个 .CSV 文件读入我的 MySQL 数据库时，该脚本可以完美运行。尽管如此，在将导入脚本插入循环后调用 mysql_query 函数时出现以下错误:无法通过套接字“/tmp/mysql.sock”连接到本地 MySQL 服务器 (2)

$con = @mysql_connect($databasehost,$databaseusername,$databasepassword) or die(mysql_error());
@mysql_select_db($databasename) or die(mysql_error());

//CLEAR old contents from table
$queryDelete = "delete from $databasetable;";
$resultDelete = @mysql_query($queryDelete) or die("Error clearing table of old data: $query<br />" . mysql_error());

//READ directory for CSV files
//path to directory to scan IF NOT IN SAME FOLDER
$directory = "../data/";
//get all files IN CURRENT DIRECTORY with a .csv extension OTHERWISE add $csvfiles = glob($directory . "*.csv");
$csvfiles = glob("*.csv");
$numCSVFiles = count($csvfiles);

//Grab each CSV file and import to DB
for ($i = 0; $i < $numCSVFiles; $i++) {

    $csvfile = $csvfiles[$i];

    //TEST FILES
    if(!file_exists($csvfile)) {
        echo "File (" . $csvfile . ") not found. Make sure you specified the correct path.\n";
        exit;
    }
    $file = fopen($csvfile,"r");

    if(!$file) {
        echo "Error opening data file.\n";
        exit;
    }
    $size = filesize($csvfile);

    if(!$size) {
        echo "File is empty.\n";
        exit;
    }
    $csvcontent = fread($file,$size);
    fclose($file);

    $lines = 0;
    $queries = "";
    $linearray = array();

    foreach(split($lineseparator,$csvcontent) as $line) {

        $lines++;
        $line = trim($line," \t");
        $line = str_replace("\r","",$line);

        /************************************
        This line escapes the special character. remove it if entries are already escaped in the csv file
        ************************************/
        //$line = str_replace("'","\'",$line);
        /*************************************/

        $linearray = explode($fieldseparator,$line);
        $linemysql = implode("','",$linearray);

        if($addauto == 1)
            $query = "insert into $databasetable values('','$linemysql');";
        else
            $query = "insert into $databasetable values('$linemysql');";

        $queries .= $query . "\n<br />";
        //THIS IS WHERE THE ERROR OCCURS WHILE RUNNING INSIDE THE LOOP
        $result = @mysql_query($query) or die("Error 1: " . mysql_error() . "<br />Query Attempted: " . $query);

        if(!$result) { $resultText = "Failure to execute MySQL queries. Please try again later."; } else { $resultText = "Successfully executed queries."; }
    }

    @mysql_close($con) or die("Error 2: " . mysql_error());

    //LOG mysql queries
    if($save) {
        if(!is_writable($outputfile)) {
            echo "File is not writable, check permissions.\n";
        }
        else {
            $file2 = fopen($outputfile,"w");
            if(!$file2) {
                echo "Error writing to the output file.\n";
            }
            else {
                fwrite($file2,$queries);
                fclose($file2);
            }
        }
    }
}

Answer 1

您正在循环中执行 mysql_close()，因此在插入第一个文件后，您会终止数据库连接，然后尝试插入下一个文件。

如果您的代码缩进正确，您就会遇到这个问题。