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This time I will bring you a detailed explanation of the steps for cutting and merging large files with PHP. What are the precautions for cutting and merging large files with PHP? The following is a practical case, let's take a look.
Split code
split.php<?php $i = 0; //分割的块编号 $fp = fopen("hadoop.sql","rb"); //要分割的文件 $file = fopen("split_hash.txt","a"); //记录分割的信息的文本文件,实际生产环境存在redis更合适 while(!feof($fp)){ $handle = fopen("hadoop.{$i}.sql","wb"); fwrite($handle,fread($fp,5242880));//切割的块大小 5m fwrite($file,"hadoop.{$i}.sql\r\n"); fclose($handle); unset($handle); $i++; } fclose ($fp); fclose ($file); echo "ok";
Merge code
merge.php<?php $hash = file_get_contents("split_hash.txt"); //读取分割文件的信息 $list = explode("\r\n",$hash); $fp = fopen("hadoop2.sql","ab"); //合并后的文件名 foreach($list as $value){ if(!empty($value)) { $handle = fopen($value,"rb"); fwrite($fp,fread($handle,filesize($value))); fclose($handle); unset($handle); } } fclose($fp); echo "ok";I believe you have mastered the method after reading the case in this article. For more exciting information, please pay attention to other related articles on the php Chinese website! Recommended reading:
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