php将值从文件更改为另一个文件

I have 2 files (A.txt and B.txt). I want to change / update file B of information on file A. the contents of the file A is :

我有2个文件(A.txt和B.txt)。我想更改/更新文件A上的信息文件B.文件A的内容是:

Fish    2   4
Horse   3   2
Chicken 1   5

the contents of the file B is :

文件B的内容是:

not 5   2
not 3   2
not 2   2
not 2   4

I want to get his results from file B, like this:

我想从文件B中得到他的结果,如下所示:

not 5   2
Horse   3   2
not 2   2
Fish    2   4

I know it use the expression "if". but I do not know how to code. is there anything that can help? in the file are separated by the "tabs" and "newline"

我知道它使用“if”这个表达式。但我不知道如何编码。有什么可以帮助吗?在文件中由“制表符”和“换行符”分隔

1 个解决方案

#1

Try

<?php

    foreach (file("A.txt") as $line) 
    {
        // Split line
        $field = preg_split('/\s+/',$line);

        // This is your array index
        $index = $field[1].' '.$field[2];

        // Array holds name which is first field
        $Array[$index] = $field[0];
    }

    foreach(file("B.txt") as $line)
    {

        // Split field   
        $field = preg_split('/\s+/',$line);

        // 2nd file index
        $index = $field[1].' '.$field[2];

        // if index is set in array echo name else line
        echo (isset($Array[$index])?$Array[$index].' '.$index:$line).'<br>';
    }
?>

Would result for given input

将给出输入的结果

 not 5 2
 Horse 3 2
 not 2 2
 Fish 2 4