Concatenate files in PHP

Question

I'd like to know if there is a faster way of concatenating 2 text files in PHP, than the usual way of opening txt1 in a+, reading txt2 line by line and copying each line to txt1.

Answer 1

If you want to use a pure-PHP solution, you could use file_get_contents to read the whole file in a string and then write that out (no error checking, just to show how you could do it):

$fp1 = fopen("txt1", 'a+');
$file2 = file_get_contents("txt2");
fwrite($fp1, $file2);

Answer 2

It's probably much faster to use the cat program in linux if you have command line permissions for PHP

system('cat txt1 txt2 > txt3');

Answer 3

$content = file_get_contents("file1");
file_put_contents("file2", $content, FILE_APPEND);