解析字符串时的php数组问题

Question

我在 PHP 中循环一个字符串数组。具体来说，我在每个数组行（..）中寻找双点。如果没有找到点，则将整行附加到第二个数组行。如果找到，那么我将行拆分，将左半部分放在当前（第二个）数组行中，将右半部分放在 next 行中。

这是我目前所拥有的：

$fudgedindex = 0;
$parsedrows = array('');

foreach($refinedlist as $rowtoparse)
{
    $pos2 = strpos($rowtoparse, "..");

    //echo $refinedlist[$index] . "<br>";
    if ($pos2 === false)
    {
        $parsedrows[$fudgedindex] = $parsedrows[$fudgedindex] . $rowtoparse;
    }
    else
    {
        $length = strlen($rowtoparse);
        $partialleft = substr($rowtoparse, 0, $pos2);
        $partialright = substr($rowtoparse, $pos2);
        $parsedrows[$fudgedindex] = $parsedrows[$fudgedindex] . $partialleft;
        $fudgedindex = $fudgedindex + 1;
        $parsedrows = '';

        $parsedrows[$fudgedindex] = $parsedrows[$fudgedindex] . $partialright;
    }
}

在增加 $fudgedindex 后，我不断得到未定义的索引。

自从我使用 PHP 以来已经有一段时间了，我觉得我要么想多了，有点过于程序化，要么犯了一个令人头疼的错误。

任何帮助表示赞赏！再次感谢您抽出宝贵时间提供帮助。 =)

编辑：根据 cmets，这就是我的目标......

$refinedlist[0]="Today I bought milk..Then I went to the "
[1]="store and bought even more food "
[2]="such as apples..I was happy..Then"
[3]=" I went to stackoverflow.com and asked this question "
[4]="to solve my problem.."

结果应该是：

$parsedrows[0]="Today I bought milk"
[1]="Then I went to the store and bought even more food such as apples"
[2]="I was happy."
[3]="Then I went to stackoverflow.com and asked this question to solve my problem"

编辑 2：错误消失了，因此最初的问题已修复。但是，当我运行这个之后：

foreach($parsedrows as $rowtoprint)
{
    echo $rowtoprint . "<br>";
}

只显示最后一行。

Answer 1

你的问题是

    $parsedrows[$fudgedindex] = $parsedrows[$fudgedindex] . $partialright;

您增加了$fudgedindex 并正在使用此语句设置一个新的数组元素。然而，您还引用了这个尚不存在的新元素（= 的右侧） - 导致错误。

你应该说

    $parsedrows[$fudgedindex] = $partialright;

因为它是下一行的开始。

您的第二个问题开始于注意到您正在重新初始化 $parsedrows 并清除所有以前的数组元素。你需要删除$parsedrows = '';

但是，由于您可以在一行中包含多个“..”，因此您需要包含一个循环来处理每一行，直到完成。我不得不重写整个事情来完成这个。这会产生你想要的结果

<?php

$refinedlist[0]="Today I bought milk..Then I went to the ";
$refinedlist[1]="store and bought even more food ";
$refinedlist[2]="such as apples..I was happy..Then";
$refinedlist[3]=" I went to stackoverflow.com and asked this question ";
$refinedlist[4]="to solve my problem..";

$fudgedindex = 0;
$parsedrows = array('');

foreach($refinedlist as $rowtoparse)   
{
    while (($pos2 = strpos($rowtoparse, "..")) !== false)
    {
        $length = strlen($rowtoparse);
        $partialleft = substr($rowtoparse, 0, $pos2);

        // keep what is not yet processed in the original var
        // while loop will process again
        $rowtoparse = substr($rowtoparse, $pos2 + 2);

        // add to current row
        $parsedrows[$fudgedindex] = $parsedrows[$fudgedindex] . $partialleft;

        // increment the row & initialize
        $fudgedindex += 1;
        $parsedrows[$fudgedindex] = "";
    }

    // add whatever is left to the current row
    $parsedrows[$fudgedindex] = $parsedrows[$fudgedindex] . $rowtoparse;
}

foreach($parsedrows as $rowtoprint)
{
    echo $rowtoprint . "<br>";
}

这会产生（没有突出显示）：

Today I bought milk
Then I went to the store and bought even more food such as apples
I was happy
Then I went to stackoverflow.com and asked this question to solve my problem