(PHP 4, PHP 5, PHP 7)
imagedashedline — Draw a dashed line
$image
   , int $x1
   , int $y1
   , int $x2
   , int $y2
   , int $color
   )This function is deprecated. Use combination of imagesetstyle() and imageline() instead.
imageAn image resource, returned by one of the image creation functions, such as imagecreatetruecolor().
x1Upper left x coordinate.
y1Upper left y coordinate 0, 0 is the top left corner of the image.
x2Bottom right x coordinate.
y2Bottom right y coordinate.
colorThe fill color. A color identifier created with imagecolorallocate().
Always returns true
Example #1 imagedashedline() example
<?php
// Create a 100x100 image
$im = imagecreatetruecolor(100, 100);
$white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
// Draw a vertical dashed line
imagedashedline($im, 50, 25, 50, 75, $white);
// Save the image
imagepng($im, './dashedline.png');
imagedestroy($im);
?>
The above example will output something similar to:
 
     Example #2 Alternative to imagedashedline()
<?php
// Create a 100x100 image
$im = imagecreatetruecolor(100, 100);
$white = imagecolorallocate($im, 0xFF, 0xFF, 0xFF);
// Define our style: First 4 pixels is white and the 
// next 4 is transparent. This creates the dashed line effect
$style = Array(
                $white, 
                $white, 
                $white, 
                $white, 
                IMG_COLOR_TRANSPARENT, 
                IMG_COLOR_TRANSPARENT, 
                IMG_COLOR_TRANSPARENT, 
                IMG_COLOR_TRANSPARENT
                );
imagesetstyle($im, $style);
// Draw the dashed line
imageline($im, 50, 25, 50, 75, IMG_COLOR_STYLED);
// Save the image
imagepng($im, './imageline.png');
imagedestroy($im);
?>