3

如何使用 PHP 按字符数将大文本文件拆分为单独的文件？因此，每 1000 个字符拆分 10,000 个字符的文件将被拆分为 10 个文件。此外，我只能在找到句号后拆分吗？

谢谢。

更新 1：我喜欢 zombats 代码，我删除了一些错误并提出了以下内容，但有谁知道如何只在句号后拆分？

$i = 1;
    $fp = fopen("test.txt", "r");
    while(! feof($fp)) {
        $contents = fread($fp,1000);
        file_put_contents('new_file_'.$i.'.txt', $contents);
        $i++;
    }

更新 2：我接受了 zombats 的建议并将代码修改为下面的代码，它似乎可以工作 -

$i = 1;
    $fp = fopen("test.txt", "r");
    while(! feof($fp)) {
        $contents = fread($fp,20000);
        $contents .= stream_get_line($fp,1000,".");
        $contents .=".";

        file_put_contents("Split/".$tname."/"."new_file_".$i.".txt", $contents);
        $i++;
    }
4

6 回答 6

5

您应该能够使用基本的fread()轻松完成此操作。您可以指定要读取的字节数，因此读取精确数量并将其输出到新文件是微不足道的。

尝试这样的事情：

$i = 1;
$fp = fopen("test.txt",'r');
while(! feof($fp)) {
    $contents = fread($fp,1000);
    file_put_contents('new_file_'.$i.'.txt',$contents);
    $i++;
}

编辑

如果您希望在某个长度或某个字符上停止，那么您可以使用stream_get_line()而不是fread(). 它几乎相同，只是它允许您指定任何您希望的结束分隔符。请注意，它不会将分隔符作为读取的一部分返回。

$contents = stream_get_line($fp,1000,".");
于 2010-01-11T19:41:56.063 回答
4

运行功能存在错误；变量$split未定义。

于 2012-11-20T11:45:42.197 回答
1

最简单的方法是读取文件的内容，拆分内容，然后保存到另外两个文件中。如果您的文件超过几 GB，由于整数大小的限制，您将在 PHP 中遇到问题。

于 2010-01-11T19:21:25.120 回答
1

你也可以写一个类来为你做这件事。

<?php

/**
* filesplit class : Split big text files in multiple files
*
* @package
* @author Ben Yacoub Hatem <hatem@php.net>
* @copyright Copyright (c) 2004
* @version $Id$ - 29/05/2004 09:02:10 - filesplit.class.php
* @access public
**/
class filesplit{
    /**
     * Constructor
     * @access protected
     */
    function filesplit(){

    }

    /**
     * File to split
     * @access private
     * @var string
     **/
    var $_source = 'logs.txt';

    /**
     *
     * @access public
     * @return string
     **/
    function Getsource(){
        return $this->_source;
    }

    /**
     *
     * @access public
     * @return void
     **/
    function Setsource($newValue){
        $this->_source = $newValue;
    }

    /**
     * how much lines per file
     * @access private
     * @var integer
     **/
    var $_lines = 1000;

    /**
     *
     * @access public
     * @return integer
     **/
    function Getlines(){
        return $this->_lines;
    }

    /**
     *
     * @access public
     * @return void
     **/
    function Setlines($newValue){
        $this->_lines = $newValue;
    }

    /**
     * Folder to create splitted files with trail slash at end
     * @access private
     * @var string
     **/
    var $_path = 'logs/';

    /**
     *
     * @access public
     * @return string
     **/
    function Getpath(){
        return $this->_path;
    }

    /**
     *
     * @access public
     * @return void
     **/
    function Setpath($newValue){
        $this->_path = $newValue;
    }

    /**
     * Configure the class
     * @access public
     * @return void
     **/
    function configure($source = "",$path = "",$lines = ""){
        if ($source != "") {
            $this->Setsource($source);
        }
        if ($path!="") {
            $this->Setpath($path);
        }
        if ($lines!="") {
            $this->Setlines($lines);
        }
    }


    /**
     *
     * @access public
     * @return void
     **/
    function run(){
        $i=0;
        $j=1;
        $date = date("m-d-y");
        unset($buffer);

        $handle = @fopen ($this->Getsource(), "r");
        while (!feof ($handle)) {
          $buffer .= @fgets($handle, 4096);
          $i++;
              if ($i >= $split) {
              $fname = $this->Getpath()."part.$date.$j.txt";
               if (!$fhandle = @fopen($fname, 'w')) {
                    print "Cannot open file ($fname)";
                    exit;
               }

               if (!@fwrite($fhandle, $buffer)) {
                   print "Cannot write to file ($fname)";
                   exit;
               }
               fclose($fhandle);
               $j++;
               unset($buffer,$i);
                }
        }
        fclose ($handle);
    }


}
?>


Usage Example
<?php
/**
* Sample usage of the filesplit class
*
* @package filesplit
* @author Ben Yacoub Hatem <hatem@php.net>
* @copyright Copyright (c) 2004
* @version $Id$ - 29/05/2004 09:14:06 - usage.php
* @access public
**/

require_once("filesplit.class.php");

$s = new filesplit;

/*
$s->Setsource("logs.txt");
$s->Setpath("logs/");
$s->Setlines(100); //number of lines that each new file will have after the split.
*/

$s->configure("logs.txt", "logs/", 2000);
$s->run();
?>

来源 http://www.weberdev.com/get_example-3894.html

于 2010-01-11T19:41:42.617 回答
1

我有修复类并与 .txt 文件完美配合。

<?php

/**
* filesplit class : Split big text files in multiple files
*
* @package
* @author Ben Yacoub Hatem <hatem@php.net>
* @copyright Copyright (c) 2004
* @version $Id$ - 29/05/2004 09:02:10 - filesplit.class.php
* @access public
**/
class filesplit{
    /**
     * Constructor
     * @access protected
     */
    function filesplit(){

    }

    /**
     * File to split
     * @access private
     * @var string
     **/
    var $_source = 'logs.txt';

    /**
     *
     * @access public
     * @return string
     **/
    function Getsource(){
        return $this->_source;
    }

    /**
     *
     * @access public
     * @return void
     **/
    function Setsource($newValue){
        $this->_source = $newValue;
    }

    /**
     * how much lines per file
     * @access private
     * @var integer
     **/
    var $_lines = 1000;

    /**
     *
     * @access public
     * @return integer
     **/
    function Getlines(){
        return $this->_lines;
    }

    /**
     *
     * @access public
     * @return void
     **/
    function Setlines($newValue){
        $this->_lines = $newValue;
    }

    /**
     * Folder to create splitted files with trail slash at end
     * @access private
     * @var string
     **/
    var $_path = 'logs/';

    /**
     *
     * @access public
     * @return string
     **/
    function Getpath(){
        return $this->_path;
    }

    /**
     *
     * @access public
     * @return void
     **/
    function Setpath($newValue){
        $this->_path = $newValue;
    }

    /**
     * Configure the class
     * @access public
     * @return void
     **/
    function configure($source = "",$path = "",$lines = ""){
        if ($source != "") {
            $this->Setsource($source);
        }
        if ($path!="") {
            $this->Setpath($path);
        }
        if ($lines!="") {
            $this->Setlines($lines);
        }
    }


    /**
     *
     * @access public
     * @return void
     **/
    function run(){

        $buffer = '';
        $i=0;
        $j=1;
        $date = date("m-d-y");
        $handle = @fopen ($this->Getsource(), "r");

        while (!feof ($handle)) {

            $buffer .= @fgets($handle, 4096);
            $i++;

            if ($i >= $this->getLines()) { 

                // set your filename pattern here.
                $fname = $this->Getpath()."split_{$j}.txt";

                if (!$fhandle = @fopen($fname, 'w')) {
                    print "Cannot open file ($fname)";
                    exit;
                }

                if (!@fwrite($fhandle, $buffer)) {
                    print "Cannot write to file ($fname)";
                    exit;
                }
                fclose($fhandle);
                $j++;
                unset($buffer,$i);
            }
        } 
        if ( !empty($buffer) && !empty($i) ) {
            $fname = $this->Getpath()."split_{$j}.txt";

            if (!$fhandle = @fopen($fname, 'w')) {
                print "Cannot open file ($fname)";
                exit;
            }

            if (!@fwrite($fhandle, $buffer)) {
                print "Cannot write to file ($fname)";
                exit;
            }
                fclose($fhandle);
            unset($buffer,$i);  
        }
        fclose ($handle);
    }


}
?>

使用示例

<?php

require_once("filesplit.class.php");

$s = new filesplit;
$s->Setsource("logs.txt");
$s->Setpath("logs/");
$s->Setlines(100); //number of lines that each new file will have after the split.
//$s->configure("logs.txt", "logs/", 2000);
$s->run();
?>
于 2016-12-15T04:09:52.833 回答
0

在运行功能中，我做了以下调整，以修复“未定义拆分”警告。

function run(){

        $buffer='';
        $i=0;
        $j=1;
        $date = date("m-d-y");
        $handle = @fopen ($this->Getsource(), "r");

        while (!feof ($handle)) {

            $buffer .= @fgets($handle, 4096);
            $i++;

            if ($i >= $this->getLines()) { // $split was here, empty value..

                // set your filename pattern here.
                $fname = $this->Getpath()."dma_map_$date.$j.csv";

                if (!$fhandle = @fopen($fname, 'w')) {
                    print "Cannot open file ($fname)";
                    exit;
                }

                if (!@fwrite($fhandle, $buffer)) {
                    print "Cannot write to file ($fname)";
                    exit;
                }
                fclose($fhandle);
                $j++;
                unset($buffer,$i);
            }
        }
        fclose ($handle);
    }

我使用这个类将一个 500,000 行的 CSV 文件拆分为 10 个文件，因此 phpmyadmin 可以使用它而不会出现超时问题。像魅力一样工作。

于 2016-02-18T22:35:46.423 回答