如何使用PHP创建.gz文件？ [英] How do you create a .gz file using PHP?

问题描述

我想使用PHP在我的服务器上压缩一个文件。有没有人有输入文件并输出压缩文件的示例？

I would like to gzip compress a file on my server using PHP. Does anyone have an example that would input a file and output a compressed file?

推荐答案

内存，这将导致大文件上的'内存不足错误。

The other answers here load the entire file into memory during compression, which will cause 'out of memory' errors on large files. The function below should be more reliable on large files as it reads and writes files in 512kb chunks.

/**
 * GZIPs a file on disk (appending .gz to the name)
 *
 * From http://stackoverflow.com/questions/6073397/how-do-you-create-a-gz-file-using-php
 * Based on function by Kioob at:
 * http://www.php.net/manual/en/function.gzwrite.php#34955
 * 
 * @param string $source Path to file that should be compressed
 * @param integer $level GZIP compression level (default: 9)
 * @return string New filename (with .gz appended) if success, or false if operation fails
 */
function gzCompressFile($source, $level = 9){ 
    $dest = $source . '.gz'; 
    $mode = 'wb' . $level; 
    $error = false; 
    if ($fp_out = gzopen($dest, $mode)) { 
        if ($fp_in = fopen($source,'rb')) { 
            while (!feof($fp_in)) 
                gzwrite($fp_out, fread($fp_in, 1024 * 512)); 
            fclose($fp_in); 
        } else {
            $error = true; 
        }
        gzclose($fp_out); 
    } else {
        $error = true; 
    }
    if ($error)
        return false; 
    else
        return $dest; 
} 

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