lib/ImageResize.php
public function imageFlip($image, $mode)
    {
        switch($mode) {
            case self::IMG_FLIP_HORIZONTAL: {
                $max_x = imagesx($image) - 1;
                $half_x = $max_x / 2;
                $sy = imagesy($image);
                $temp_image = imageistruecolor($image)? imagecreatetruecolor(1, $sy): imagecreate(1, $sy);
                for ($x = 0; $x < $half_x; ++$x) {
                    imagecopy($temp_image, $image, 0, 0, $x, 0, 1, $sy);
                    imagecopy($image, $image, $x, 0, $max_x - $x, 0, 1, $sy);
                    imagecopy($image, $temp_image, $max_x - $x, 0, 0, 0, 1, $sy);
                }
                break;
            }
            case self::IMG_FLIP_VERTICAL: {
                $sx = imagesx($image);
                $max_y = imagesy($image) - 1;
                $half_y = $max_y / 2;
                $temp_image = imageistruecolor($image)? imagecreatetruecolor($sx, 1): imagecreate($sx, 1);
                for ($y = 0; $y < $half_y; ++$y) {
                    imagecopy($temp_image, $image, 0, 0, 0, $y, $sx, 1);
                    imagecopy($image, $image, 0, $y, 0, $max_y - $y, $sx, 1);
                    imagecopy($image, $temp_image, 0, $max_y - $y, 0, 0, $sx, 1);
                }
                break;
            }
            case self::IMG_FLIP_BOTH: {
                $sx = imagesx($image);
                $sy = imagesy($image);
                $temp_image = imagerotate($image, 180, 0);
                imagecopy($image, $temp_image, 0, 0, 0, 0, $sx, $sy);
                break;
            }
            default:
                return null;
        }
        imagedestroy($temp_image);
    }
public function imageFlip($image, $mode)
    {
        switch($mode) {
            case self::IMG_FLIP_HORIZONTAL: {
                $max_x = imagesx($image) - 1;
                $half_x = $max_x / 2;
                $sy = imagesy($image);
                $temp_image = imageistruecolor($image)? imagecreatetruecolor(1, $sy): imagecreate(1, $sy);
                for ($x = 0; $x < $half_x; ++$x) {
                    imagecopy($temp_image, $image, 0, 0, $x, 0, 1, $sy);
                    imagecopy($image, $image, $x, 0, $max_x - $x, 0, 1, $sy);
                    imagecopy($image, $temp_image, $max_x - $x, 0, 0, 0, 1, $sy);
                }
                break;
            }
            case self::IMG_FLIP_VERTICAL: {
                $sx = imagesx($image);
                $max_y = imagesy($image) - 1;
                $half_y = $max_y / 2;
                $temp_image = imageistruecolor($image)? imagecreatetruecolor($sx, 1): imagecreate($sx, 1);
                for ($y = 0; $y < $half_y; ++$y) {
                    imagecopy($temp_image, $image, 0, 0, 0, $y, $sx, 1);
                    imagecopy($image, $image, 0, $y, 0, $max_y - $y, $sx, 1);
                    imagecopy($image, $temp_image, 0, $max_y - $y, 0, 0, $sx, 1);
                }
                break;
            }
            case self::IMG_FLIP_BOTH: {
                $sx = imagesx($image);
                $sy = imagesy($image);
                $temp_image = imagerotate($image, 180, 0);
                imagecopy($image, $temp_image, 0, 0, 0, 0, $sx, $sy);
                break;
            }
            default:
                return null;
        }
        imagedestroy($temp_image);
    }
public function imageFlip ( $ image , $ mode ) { switch ( $ mode ) { case self :: IMG_FLIP_HORIZONTAL : { $ max_x = imagesx ( $ image ) - 1 ; $ half_x = $ max_x / 2 ; $ sy = imagesy ( $ image ) ; $ temp_image = imageistruecolor ( $ image ) ? imagecreatetruecolor ( 1 , $ sy ) : imagecreate ( 1 , $ sy ) ; for ( $ x = 0 ; $ x < $ half_x ; ++ $ x ) { imagecopy ( $ temp_image , $ image , 0 , 0 , $ x , 0 , 1 , $ sy ) ; imagecopy ( $ image , $ image , $ x , 0 , $ max_x - $ x , 0 , 1 , $ sy ) ; imagecopy ( $ image , $ temp_image , $ max_x - $ x , 0 , 0 , 0 , 1 , $ sy ) ; } break ; } case self :: IMG_FLIP_VERTICAL : { $ sx = imagesx ( $ image ) ; $ max_y = imagesy ( $ image ) - 1 ; $ half_y = $ max_y / 2 ; $ temp_image = imageistruecolor ( $ image ) ? imagecreatetruecolor ( $ sx , 1 ) : imagecreate ( $ sx , 1 ) ; for ( $ y = 0 ; $ y < $ half_y ; ++ $ y ) { imagecopy ( $ temp_image , $ image , 0 , 0 , 0 , $ y , $ sx , 1 ) ; imagecopy ( $ image , $ image , 0 , $ y , 0 , $ max_y - $ y , $ sx , 1 ) ; imagecopy ( $ image , $ temp_image , 0 , $ max_y - $ y , 0 , 0 , $ sx , 1 ) ; } break ; } case self :: IMG_FLIP_BOTH : { $ sx = imagesx ( $ image ) ; $ sy = imagesy ( $ image ) ; $ temp_image = imagerotate ( $ image , 180 , 0 ) ; imagecopy ( $ image , $ temp_image , 0 , 0 , 0 , 0 , $ sx , $ sy ) ; break ; } default : return null ; } imagedestroy ( $ temp_image ) ; }
Flips an image using a given mode if PHP version is lower than 5.5

@param  resource $image
@param  integer  $mode
@return null
Flips an image using a given mode if PHP version is lower than 5 . 5