如何逐行读取大文件? [英] How to read a large file line by line?

问题描述

我想逐行读取文件，但没有将其完全加载到内存中.

I want to read a file line by line, but without completely loading it in memory.

我的文件太大，无法在内存中打开，如果尝试这样做，我总是会遇到内存不足的错误.

My file is too large to open in memory, and if try to do so I always get out of memory errors.

文件大小为1 GB.

推荐答案

您可以使用fgets()函数逐行读取文件:

You can use the fgets() function to read the file line by line:

$handle = fopen("inputfile.txt", "r");
if ($handle) {
    while (($line = fgets($handle)) !== false) {
        // process the line read.
    }

    fclose($handle);
} else {
    // error opening the file.
} 

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