如何在PHP

Question

我试图做的是将25个文本文件的文件名和内容分别合并到一个单独的单词文件中，我已经实现了但条件是文件名应该是标题（在h1标签中）和内容每个文件都应该在下一行。如何实现这个目标？

<?php
    for($i = 1; $i <= 25; $i++) {
        $myfile = fopen('text/text_file'.$i.'.txt', 'w+')  or die("Unable to open file!");
        $txt = "This is the content of ".$i." file";    
        fwrite($myfile, $txt);
        fclose($myfile);
    }
    $target = "text/";
    $merged_file = 'text/merged.doc';
    $files = scandir($target);
    $myfile = fopen($merged_file, 'w+');
    print_r($files);
    foreach($files as $index => $value) {
        if($value !== "." && $value !== ".." && substr($value, -3, 3) == "txt") {
            $Data = substr($value, 0, -4)."\n".file_get_contents($target.$value); 
            $da= "<h2>".$Data."</h2>";
            fwrite($myfile, $da."\n");
        }
    }
    fclose($myfile);
?>