PHP plot (2)

Last time I talked about a simple method of drawing GD, and then I used GD as the simplest "graph"-a straight line.
This time I will draw a straight line down. I will not repeat the details in the previous code.
<?
Header ("Content-type: image/png ");
$ Im = ImageCreate (200,100 );
$ Col_black = ImageColorAllocate ($ im, 0, 0 );
$ Col_orn = ImageColorAllocate ($ im, 255,192, 0 );
// Use orange today.
// Use exactly the same as the imageline function,
ImageDashedLine ($ im, 0,100,199,100, $ col_orn );
// Draw a dotted line.
    
// Let's perform a test. To illustrate a problem.
$ Col_yel = ImageColorAllocate ($ im, 255,255, 0 );
// Yellow.
ImageLine ($ im, $ col_yel );
// Draw a yellow line at the bottom of the image.
ImageLine ($ im, 200,0, 200,100, $ col_orn );
// Try to draw a clear line at the far right of the image, and there is no result.
// This indicates that the coordinates of an image with a width of 200 and a height of 100 are () ).
    
ImagePNG ($ im );
ImageDestroy ($ im );
// This section ends first.
?>
Next, the effect will be great! I am also selling it now. PHP4.0.6 or above adds this usage-you can use the alternative
Draw lines in color! Example:
<?
Header ("Content-type: image/png ");
$ Im = ImageCreate (200,100 );
$ Col_black = ImageColorAllocate ($ im, 0, 0 );
$ Col_orn = ImageColorAllocate ($ im, 255,192, 0 );
$ Col_red = ImageColorAllocate ($ im, 255, 0, 0 );
$ Style = array ($ col_red, $ col_red, $ col_black, $ col_orn, $ col_black );