src/Pqb/FilemanagerLaravel/plugins/rsc/cloudfiles.php
function _guess_content_type($handle) {
        if ($this->content_type)
            return true;
            
        if (function_exists("finfo_open")) {
            $local_magic = dirname(__FILE__) . "/share/magic";
            $finfo = @finfo_open(FILEINFO_MIME, $local_magic);

            if (!$finfo) 
                $finfo = @finfo_open(FILEINFO_MIME);
                
            if ($finfo) {

                if (is_file((string)$handle))
                    $ct = @finfo_file($finfo, $handle);
                else 
                    $ct = @finfo_buffer($finfo, $handle);

                /* PHP 5.3 fileinfo display extra information like
                   charset so we remove everything after the ; since
                   we are not into that stuff */
                if ($ct) {
                    $extra_content_type_info = strpos($ct, "; ");
                    if ($extra_content_type_info)
                        $ct = substr($ct, 0, $extra_content_type_info);
                }

                if ($ct && $ct != 'application/octet-stream')
                    $this->content_type = $ct;

                @finfo_close($finfo);
            }
        }

        if (!$this->content_type && (string)is_file($handle) && function_exists("mime_content_type")) {
            $this->content_type = @mime_content_type($handle);
        }

        if (!$this->content_type) {
            throw new BadContentTypeException("Required Content-Type not set");
        }
        return True;
    }
function _guess_content_type($handle) {
        if ($this->content_type)
            return true;
            
        if (function_exists("finfo_open")) {
            $local_magic = dirname(__FILE__) . "/share/magic";
            $finfo = @finfo_open(FILEINFO_MIME, $local_magic);

            if (!$finfo) 
                $finfo = @finfo_open(FILEINFO_MIME);
                
            if ($finfo) {

                if (is_file((string)$handle))
                    $ct = @finfo_file($finfo, $handle);
                else 
                    $ct = @finfo_buffer($finfo, $handle);

                /* PHP 5.3 fileinfo display extra information like
                   charset so we remove everything after the ; since
                   we are not into that stuff */
                if ($ct) {
                    $extra_content_type_info = strpos($ct, "; ");
                    if ($extra_content_type_info)
                        $ct = substr($ct, 0, $extra_content_type_info);
                }

                if ($ct && $ct != 'application/octet-stream')
                    $this->content_type = $ct;

                @finfo_close($finfo);
            }
        }

        if (!$this->content_type && (string)is_file($handle) && function_exists("mime_content_type")) {
            $this->content_type = @mime_content_type($handle);
        }

        if (!$this->content_type) {
            throw new BadContentTypeException("Required Content-Type not set");
        }
        return True;
    }
function _guess_content_type ( $ handle ) { if ( $ this -> content_type ) return true ; if ( function_exists ( "finfo_open" ) ) { $ local_magic = dirname ( __FILE__ ) . "/share/magic" ; $ finfo = @ finfo_open ( FILEINFO_MIME , $ local_magic ) ; if ( ! $ finfo ) $ finfo = @ finfo_open ( FILEINFO_MIME ) ; if ( $ finfo ) { if ( is_file ( ( string ) $ handle ) ) $ ct = @ finfo_file ( $ finfo , $ handle ) ; else $ ct = @ finfo_buffer ( $ finfo , $ handle ) ; /* PHP 5.3 fileinfo display extra information like
                   charset so we remove everything after the ; since
                   we are not into that stuff */ if ( $ ct ) { $ extra_content_type_info = strpos ( $ ct , "; " ) ; if ( $ extra_content_type_info ) $ ct = substr ( $ ct , 0 , $ extra_content_type_info ) ; } if ( $ ct && $ ct != 'application/octet-stream' ) $ this -> content_type = $ ct ; @ finfo_close ( $ finfo ) ; } } if ( ! $ this -> content_type && ( string ) is_file ( $ handle ) && function_exists ( "mime_content_type" ) ) { $ this -> content_type = @ mime_content_type ( $ handle ) ; } if ( ! $ this -> content_type ) { throw new BadContentTypeException ( "Required Content-Type not set" ) ; } return True ; }
Internal check to get the proper mimetype.

This function would go over the available PHP methods to get
the MIME type.

By default it will try to use the PHP fileinfo library which is
available from PHP 5.3 or as an PECL extension
(http://pecl.php.net/package/Fileinfo).

It will get the magic file by default from the system wide file
which is usually available in /usr/share/magic on Unix or try
to use the file specified in the source directory of the API
(share directory).

if fileinfo is not available it will try to use the internal
mime_content_type function.

@param string $handle name of file or buffer to guess the type from
@return boolean <kbd>True</kbd> if successful
@throws BadContentTypeException
Internal check to get the proper mimetype .