如何使用PHP通过字符计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，我是否可以在找到完整停止后拆分？
感谢。
更新1：我喜欢zombats代码而且我删除了一些错误并提出了以下内容，但有没有人知道如何只在完全停止后拆分？
$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： 我拿了zombats建议并将代码修改为下面的代码，它似乎有效 -
$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);
$i++;
}
答案 0 :(得分：4)
运行功能有一个错误;变量$split未定义。
答案 1 :(得分：3)
您应该可以使用基本fread()轻松完成此操作。您可以指定要读取的字节数，因此以精确的数量读取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++;
}
修改
如果您希望在特定字符长度或后停止，则可以使用stream_get_line()代替fread()。它几乎完全相同，只是它允许您指定任何结束分隔符。请注意，不会将分隔符作为读取的一部分返回。
$contents = stream_get_line($fp,1000,".");
答案 2 :(得分：1)
最简单的方法是读取文件内容，拆分内容，然后保存到另外两个文件。如果你的文件超过几千兆字节，由于整数大小的限制，你将在PHP中遇到问题。
答案 3 :(得分：1)
你也可以写一个课来为你做这个。
<?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();
?>
答案 4 :(得分：1)
我已经修复了课程，并且完善了.txt文件。
<?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);
}
}
?>
用法示例
<?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();
?>
答案 5 :(得分：0)
在运行功能中，我进行了以下调整，以修复＆＃34;拆分未定义＆＃34;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);
}
我使用此类将500,000行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。工作就像一个魅力。