如何使用PHP将CSV转换为制表符分隔的TXT

Question

我有一个定期更新的CSV文件，需要使用制表符分隔该文件，才能将其导入链中更深的一些工具。

我的问题是：如何使用PHP（7.3）将CSV转换为TAB分隔的TXT文件？

注意：简单地将“，”替换为“ / t”将不起作用，因为引号中包含逗号。我有大量的列标题（超过50个），并且这些列标题有时可能会更改，因此我不想在f * scv函数中命名它们（我可以从手册页中看到）。

我当前的代码如下所示，但是输出空白。

$handle = fopen("//catalyst-sabre-bucket//the_reporting//test//mit.csv", "r");
$lines = [];
if (($handle = fopen("//my-path//the_reporting//test//mit.csv", "r")) !== FALSE) {
    while (($data = fgetcsv($handle, 1000, ",")) !== FALSE) {
        $lines[] = $data;
    }
    fclose($handle);
}
$fp = fopen('//my-path//ocb_reporting//test//mit-tab.txt', 'w');
foreach ($lines as $line) {
    fputcsv($fp, $line, "\t");
}
fclose($fp);

示例输入：

Field,Place,Thing,Object,Comment,Measure
1,left,Apple,Bowl,This field contains text,Imperial
a,right,orange,House,"But, this one has commas & characters",Metric
blue,Far,car,A really large blue canary,"This, one, is, a user comment",Turtles

示例输出：

Field   Place   Thing   Object  Comment Measure
1   left    Apple   Bowl    This field contains text    Imperial
a   right   orange  House   "But, this one has commas & characters" Metric
blue    Far car A really large blue canary  "This, one, is, a user comment" Turtles

Answer 1

在提供的样本数据上，以下内容在本地测试时似乎工作正常。替换根据正则表达式完成

<?php
    $output=[];

    $file='//catalyst-sabre-bucket//the_reporting//test//mit.csv';
    $lines=file( $file );   #read directly into an array

    $pttn='/"[^"]*"(*SKIP)(*FAIL)|,/i'; # find commas not between quotes & replace with TAB
    foreach( $lines as $line ){
        $output[]=preg_replace( $pttn, chr(9), $line );
    }

    #write output to text file
    $file='//my-path//ocb_reporting//test//mit-tab.txt';
    file_put_content( $file, implode( '', $output ) );
?>

以上的输出已成功地以文本形式写入文本文件：

Field   Place   Thing   Object  Comment Measure
1   left    Apple   Bowl    This field contains text    Imperial
a   right   orange  House   "But, this one has commas & characters" Metric
blue    Far car A really large blue canary  "This, one, is, a user comment" Turtles