douxian0279 2017-08-21 18:58
浏览 49


I'm a beginner in PHP. I have a text file like this:


I can take the data as an array but unable to take it as an associative array. I want to do the following things:

  • Take the data as an associative array in PHP.
  • Search Number using ID.
  • Find out the total of Numbers
  • 写回答

1条回答 默认 最新

  • drmgg4411 2017-08-21 20:07

    I believe I understand what you want, and it's fairly simple. First you need to read the file into a php array. That can be done with something like this:

    $filedata = file($filename, FILE_IGNORE_NEW_LINES);

    Now build your desired array using a foreach() loop, explode and standard array assignment. Your search requirement is unclear, but in this example, I make the associated array element into an array that is also an associative array with keys for 'id' and 'num'.

    As you create the new array, you can compute your sum, as demonstrated.

    $filedata = array('Abid-01-80', 'Sakib-02-76');
    $lineArray = array();
    $numTotal = 0;
    foreach ($filedata as $line) {
        $values = explode('-', $line);
        $numTotal += $values[2];
        $lineArray[$values[0]] = array('id' => $values[1], 'num' => $values[2]);
    echo "Total: $numTotal

    You can see this code demonstrated here

    Updated response:

    Keep in mind that notices are not errors. They are notifiying you that your code could be cleaner, but are typically suppressed in production.

    The undefined variable notices are coming because you are using:

    $var += $var without having initialized $var previously. Note that you were inconsistent in this practice. For example you initialized $numTotal, so you didn't get a notice when you used the same approach to increment it.

    Simply add just below $numTotal = 0:

    $count = 0;
    $countEighty = 0;

    Your other notices are occurring most likely due to a blank line or string in your input that does not follow the pattern expected. When explode is executed it is not returning an array with 3 elements, so when you try and reference $values = explode('-', $line); you need to make sure that $line is not an empty string before you process it. You could also add a sanity check like:

    enter code hereif (count($values) === 3) { // It's ok to process

    本回答被题主选为最佳回答 , 对您是否有帮助呢?



  • ¥200 GitHub开源程序配置在VScode调试
  • ¥15 爬虫保存的scv文件0kb
  • ¥20 如何实现基于强化学习的带电作业机械臂的运动规划与控制
  • ¥15 使用wpf制作打砖块游戏时遇到的一个Bug
  • ¥15 qrCodeDetector.detectAndDecode
  • ¥15 海洋可控源和大地电磁一维联合反演
  • ¥15 MFC多文档程序获取视图指针问题
  • ¥15 如何把matlabR2023遗传算法工具箱里面的各类选项对应的代码调出来呢?
  • ¥30 MDIGetActive() 获取活动view
  • ¥15 有数据,如何安装使用CLIP模型检索图片