用php查找并替换txt文件中特定行的特定字符串

Question

我想知道如何用php将特定行的特定单词/字符串替换为文本文件。

文本文件内容如下：

 1|1|1
 nikki|nikki@yahoo.com|nikki
 nikki|nikki@gmail.com|nikki
 nikki|nikki@hotmail.com|nikki

领域详情：

 COLUMN:0 = $name,
 COLUMN:1 = $email,
 COLUMN:2 = $nickname,

更换细节：

 COLUMN:0 = $newName,
 COLUMN:1 = $newEmail,
 COLUMN:2 = $newnickName,     

从上面的内容你可以猜到查找/搜索是基于column:1。 Ans 如果找到匹配项，则替换 column:0 OR column:2 [基于选择]。

我尝试了[查找列：1]：

 $fileData = file("file.txt");
 foreach($fileData as $Key => $Val) { 
  $Data[$Key] = explode("|", $Val);
  if ( trim($Data[$Key][1]) == $email ){
unset($fileData[$Key]);
    //REPLACE TAKE PLACE HERE
    break;
  }
 }

[用于替换]：

 /* REPLACE NAME */
 $file = "file.txt";
 $oname = "|$name|";$nname = "|$newName|";
 file_put_contents($file, str_replace($oname, $nname, file_get_contents($file)));
 /* REPLACE NICKNAME */
 $file = "file.txt";
 $onickname = "|$nickname|";$nnickname = "|$newnickname|";
 file_put_contents($file, str_replace($onickname, $nnickname, file_get_contents($file)));

但它正在替换所有匹配的“$name”。

我也尝试了以下方式：

 $fileData[$Key] = str_replace($name, $newName, $fileData[$Key]);
 file_put_contents($file,$fileData);

/* $name & $newName -:> $nickname & $newnickname

但它不起作用。

如果我想用“nikkigmail”替换“nikki@gmail.com”的列：0 [“nikki”]，那么数据应该是：

 1|1|1
 nikki|nikki@yahoo.com|nikki
 nikkigmail|nikki@gmail.com|nikki
 nikki|nikki@hotmail.com|nikki

并且，如果想用“hotmail”替换“nikki@hotmail.com”的column:2 [“nikki”]，那么：

 1|1|1
 nikki|nikki@yahoo.com|nikki
 nikkigmail|nikki@gmail.com|nikki
 nikki|nikki@hotmail.com|hotmail

我可以得到要更正的代码吗？

Answer 1

这是我将如何替换此类内容的方法。与其担心str_replace，不如实际修改file返回的数组？

<?php

$email = "nikki@gmail.com"; // Search email
$data = file("file.txt", FILE_IGNORE_NEW_LINES); // Read in the data

foreach($data as $key => $line) {
    $bits = explode("|", $line);
    if($bits[1] === $email) {
        // Update this in place,
        $bits[0] = "nikkigmail";
        $data[$key] = implode("|", $bits);
    }
}

$write = implode("\n", $data); // the data to write however you please.

请记住，这也可以扩展以满足您的行/列需求。例如，您可以使用类似的东西。

/**
 * The reason these are named differently is because they don't always
 * search/replace. For example, you can find nikki@gmail.com in one row,
 * but just be setting a different column in that row to a value..
 */

$match = array('col' => 1, 'str' => 'nikki@gmail.com'); // Search data at row
$update = array('col' => 0, 'str' => 'nikkigmail'); // Replace data at row

$data = file("file.txt", FILE_IGNORE_NEW_LINES); // Read in the data

foreach($data as $key => $line) {
    $bits = explode("|", $line);
    if($bits[$match['col']] === $match['str']) {
        // Update this in place,
        $bits[$update['col']] = $update['str'];
        $data[$key] = implode("|", $bits);
    }
}

$write = implode("\n", $data); // the data to write however you please.