How does php write the content of multiple php files to one file?

How does php write the content of multiple php files to one file? these cache php files are all stored in the cache Directory, for example:
A. php
B. php
C. php

The content in these php files is some cached data, which is written as an array during my storage:
Example: a. php file
$ Locale R = array (
'AAA' => '123 ',
'BBB '=> '123 ',
'CCC '=> '123 ',
);
?>

Example: B. php file
$ BArr = array (
'AAA' => '123 ',
'BBB '=> '123 ',
'CCC '=> '123 ',
);
?>

Example: c. php file
$ CArr = array (
'AAA' => '123 ',
'BBB '=> '123 ',
'CCC '=> '123 ',
);
?>

Now I want to write all the php files in this directory to a php file.
Below is the code I wrote, but after writing the file, I found that the php mark of the file is also written into it. I also escaped the array format of the cached file.
How can the master modify it,

// Create a cache directory $ dir = "cache"; $ fileDir = @ opendir ($ dir); if (! $ FileDir) {echo 'failed to open the directory '; exit;} while (false! ==( $ File = @ readdir ($ fileDir) {// skip the current directory and the upper-level directory if ('. '==$ file | '.. '===$ file) continue; // get the file suffix $ filetype = substr ($ file, strripos ($ file ,". ") + 1); // file path $ filepath = $ dir. '/'. $ file; // Determine whether the php file exists and whether the if ($ filetype = 'php' & is_file ($ filepath) {$ handle = fopen ($ filepath, "r"); $ contents. = fread ($ handle, filesize ($ filepath); fclose ($ handle) ;}} write ('data. php ',"
 ");

Reply to discussion (solution)

You can filter PHP IDs like this.
Change row 18th:

$contents.= rtrim(ltrim(fread($handle,filesize($v)),'
 ');

The escape is because of the var_export function.

Filter out It is unnecessary, but sometimes it will go wrong (if there is data)

$dir = "cache";$out = 'data.php';file_put_contents($out);foreach(glob("$dir/*.php") as $fn) {  file_put_contents($out, file_get_contents($fn), FILE_APPEND);}

Filter out It is unnecessary, but sometimes it will go wrong (if there is data)

$dir = "cache";$out = 'data.php';file_put_contents($out);foreach(glob("$dir/*.php") as $fn) {  file_put_contents($out, file_get_contents($fn), FILE_APPEND);}

Writing code in this way seems to be more efficient than writing code in my way. I learned it !!
But if you do not delete the php identifier, the generated file will be like this? How can we improve it ??

  '111',  'bbb' => '222',  'ccc' => '333',);?>
  '111',  'bbb' => '222',  'ccc' => '333',);?>
  '111',  'bbb' => '222',  'ccc' => '333',);?>
  '111',  'bbb' => '222',  'ccc' => '333',);?>

// Obtain the file suffix and determine whether it is a php suffix if (substr ($ file,-4) = '. php '){.........}

I think it's okay to define a class and capture data, but it's not complicated.

Str_replace first replaces the PHP identifier with null, and then it is simple.