convert ending line of a file with a php script

Question

I'd like to know if it's possible to convert the endings lines mac (CR : \r) to windows (CRLF : \r\n) with a php script.

Indeed I've got a php script which run periodically on my computer to upload some files on a FTP server and the ending lines need to be changed before the upload. It's easy to do it manually but I would like to do it automatically.

Answer 1

In the end the safer way is to change what you don't want replaced first, here my function :

/**Convert the ending-lines CR et LF in CRLF.
 * 
 * @param string $filename Name of the file
 * @return boolean "true" if the conversion proceed without error and else "false".
 */
function normalize ($filename) {
                
    echo "Convert the ending-lines of $filename into CRLF ending-lines...";
    
    //Load the content of the file into a string
    $file_contents = @file_get_contents($filename);
    
    if (!file_contents) {
        echo "Could not convert the ending-lines : impossible to load the file.PHP_EOL";
        return false;
    }
    
    //Replace all the CRLF ending-lines by something uncommon 
    $DontReplaceThisString = "\r\n";
    $specialString = "!£#!Dont_wanna_replace_that!#£!";
    $string = str_replace($DontReplaceThisString, $specialString, $file_contents);
                 
    //Convert the CR ending-lines into CRLF ones
    $file_contents = str_replace("\r", "\r\n", $file_contents);
                
    //Replace all the CRLF ending-lines by something uncommon
    $file_contents = str_replace($DontReplaceThisString, $specialString, $file_contents); 
                
    //Convert the LF ending-lines into CRLF ones
    $file_contents = str_replace("\n", "\r\n", $file_contents);
                
    //Restore the CRLF ending-lines
    $file_contents = str_replace($specialString, $DontReplaceThisString, $file_contents);
    
    //Update the file contents
    file_put_contents($filename, $file_contents);
    
    echo "Ending-lines of the file converted.PHP_EOL";
    return true;
 }