如何在php中复制一组变量[duplicate]

Question

This question already has an answer here:

• How to combine two strings together in PHP? 17 answers

I want to make a php variable a group of other variables so that I can put the new group of variables into a .txt file. Something like:

    $txt = $_GET["html"]
    $txt2 = $_GET["js"]
    $txt3 = $_GET["php"]
    $txt4 = $_GET["other"]
    $text = $txt $txt2 $txt3 $txt4;
    $filename = fopen("config.txt", "w");
    fwrite($filename, $text);
    fclose($filename);

I have searched on Google and Stack Overflow, but nothing seems to solve my problem.

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Answer 1

If you just want to combine multiple string values into one string value then the term you're looking for is "concatenate", which in PHP is done with the . operator:

$text = $txt . $txt2 . $txt3 . $txt4;