:sig
bool file_copy(String from, String to)

:params
from : source path
to : destination path (overwritten if it exists)
return value : true on success

:content
Copies a file's contents to a new path, overwriting the destination if present.

:example
file_put_contents("/tmp/doc-copy-src.txt", "payload");
file_copy("/tmp/doc-copy-src.txt", "/tmp/doc-copy-dst.txt");
print(file_get_contents("/tmp/doc-copy-dst.txt"), "\n");

:see
>sys
file_rename
file_put_contents