PHP Read-write File Implementation Refresh page number plus one

$filename= './count.txt ';//The first step: Create the file and initialize it to 0;if(!file_exists($filename)){    //Open Mode "W", file does not exist, then create    $handle=fopen($filename, ' W '); fwrite($handle, 0);//write 0 to Count.txt    fclose($handle);//Close File Release resources}//Second Step: Open the file, read the content, and add 1, then write Count.txt$handle=fopen($filename, ' r+ ');//read out the numbers in the Count.txt$line=fgets($handle);$line++;//variable self-1//and then write the variable line count.txtRewind($handle);//reset the pointer;fwrite($handle,$line);fclose($handle);//Close File Release resources//Third step: The count.txt number, one of the read//read-only mode open$handle=fopen($filename, ' R ');//Note the path of the picture and the processing of the picture file 0 while(false!== ($char=fgetc($handle))) {    Echo"$char. jpg/> ";}fclose($handle);//Close File Release resources

PHP Read-write File Implementation Refresh page number plus one