PHP CSV - MYSQL 超时

Question

首先，我搜索了相关答案，有一些 - 但找不到任何与我正在寻找的内容非常具体的答案。我相信有更好的方法!

基本上，我正在寻找一些建议，我有一个脚本可以将服务器上的 CSV 文件转换为 MYSQL 数据库。但是，CSV 文件是 20mb，脚本刚刚超时。我已经修改了我的 php.ini 所以它不应该超时，而是导致 500 内部服务器错误。有没有办法让页面保持事件状态而不超时(jquery 会做这样的事情) - 如果没有，我知道我过去对大型 SQL 文件使用过 shell 执行，是否有替代方法来使用类似的东西这？建议真的很感激。我的编程知识不太好，所以请耐心等待

这是我正在使用的脚本:

<?php 
$databasehost = "localhost";
$databasename = "test";
$databasetable = "sample";
$databaseusername ="test";
$databasepassword = "";
$fieldseparator = ",";
$lineseparator = "\n";
$csvfile = "filename.csv";
/********************************/
/* Would you like to add an ampty field at the beginning of these records?
/* This is useful if you have a table with the first field being an auto_increment integer
/* and the csv file does not have such as empty field before the records.
/* Set 1 for yes and 0 for no. ATTENTION: don't set to 1 if you are not sure.
/* This can dump data in the wrong fields if this extra field does not exist in the table
/********************************/
$addauto = 0;
/********************************/
/* Would you like to save the mysql queries in a file? If yes set $save to 1.
/* Permission on the file should be set to 777. Either upload a sample file through ftp and
/* change the permissions, or execute at the prompt: touch output.sql && chmod 777 output.sql
/********************************/
$save = 1;
$outputfile = "output.sql";
/********************************/


if(!file_exists($csvfile)) {
      echo "File 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);

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

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

      $queries .= $query . "\n";

      @mysql_query($query);
}

@mysql_close($con);

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);
            }
      }

}

echo "Found a total of $lines records in this csv file.\n";


?>

Answer 1

与其手动处理 csv，不如使用 LOAD DATA INFILE 在一条 MySQL 命令中完成。 .这会将处理转移到 MySQL，并且应该意味着 PHP 不会超时。如果仍然超时，您始终可以从 shell 运行相同的命令。