Php function file () usage, how to solve

Php function file () Usage & lt ;? Php {fp=fopen("{{& quot;, & quot; rb + & quot;); & nbsp; fseek ($ fp, 0); & nbsp; while ($ fp) {& nbsp; echo php function file () usage
$ Fp = fopen (" .txt", "rb + ");
Fseek ($ fp, 0 );
While ($ fp ){
Echo fgets ($ fp); echo"
";
}
Echo "";

$ Readarray = file ("classic style grammar .txt ");
If (! $ Readarray ){
Echo "an error occurred while reading the file using the file function.
";
}
Else file_put_contents (" .txt", $ readarray );
Echo "";
Fclose ($ fp );
?>
In the above code, why cannot I write the data in the file "classic fashion grammar .txt" under the same directory to the file "grammar .txt" (newly created?

What do I know? Thank you for your advice!

------ Solution --------------------
$ Fp = fopen (" .txt", "rb + ");
Fseek ($ fp, 0 );
While (feof ($ fp )){
Echo fgets ($ fp); echo"
";
}

Fgets () takes only one row of content in the file. The internal pointer of the file determines the row to take. Fgets retrieves the content of each row, and the pointer moves forward.
Feof () is used to check whether the pointer has reached the end of the file.
If you use $ fp, its value will not change, so it will fall into an endless loop.

==============
$ Readarray = file ("classic style grammar .txt ");
If (! $ Readarray ){
Echo "an error occurred while reading the file using the file function.
";
}
Else file_put_contents (" .txt", $ readarray );
Echo "";
Fclose ($ fp );

The return value of the file () function is an array type. File_put_contents () accepts the string type. Therefore, $ readarray is forcibly converted to the string type, that is, 'array'
Reference: http://www.php.net/manual/zh/ref.filesystem.php