PHP：将数组保存到文件（映射）

Posted 2023-05-07

【中文标题】PHP：将数组保存到文件（映射）

【英文标题】：PHP: Save Array to file (mapping)

【发布时间】：2015-08-24 14:07:48

【问题描述】：

我想通过 POST 将一个数组提供给一个 php 脚本，该脚本应该将该数组保存到一个“地图”文件中。

$data = $_POST["dat"];
for($y = 0; $y < 37; $y++)
       for($x = 0; $x < 37; $x++)
              $dat .= $data[($y*37)+$x] . ",";
       
       $dat .= "\n";

但是文件是这样的：

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

但我想要这个结果：

0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,

为什么每行之间有空行？？

【问题讨论】：

尝试换掉：$data[($y*37)+$x] 和 trim($data[($y*37)+$x])

var_dump $dat时有空行吗？换句话说：尝试找出问题是出现在您粘贴的代码中（看起来不像）还是在写入文件时出现。

@Rizier123，工作，请回答，以便我可以标记为已解决

【参考方案1】：

看来您的输入中已经有了一些换行符。要简单地删除它们，只需使用trim()，例如

$dat .= trim($data[($y*37)+$x]) . ",";
      //^^^^^ See here

【讨论】：

对不起，我不明白，这怎么可能是一个解决方案？如果他在输入中有新行，则行将在中间逗号之前的某处断开，并在以逗号开头正下方有一个新行。这不是我在 OP 的示例中看到的。

@rlanvin 为什么他们需要在逗号之前的中间？它们可以在任何地方，但 OP 在模式中有它们，因此在第一行之后，他在彼此的新输入行中都有一个新行。

输入后用逗号连接。如果您的输入包含您所建议的“0\n”，则结果字符串应为“0\n”，因此您会看到一个换行符，然后在下一行的开头看到一个逗号。

没错，这可以解释。但反过来更常见，它必须恰好是每 37 个输入，而不是其他任何地方。好吧，为什么不...感谢您的发现。