GD and Image Functions
PHP Manual

imagedashedline

Draw a dashed line

Description

bool imagedashedline(
    GdImage $image,
    int $x1,
    int $y1,
    int $x2,
    int $y2,
    int $color
)

This function is deprecated. Use combination of imagesetstyle and imageline instead.

Parameters

image

A GdImage object, returned by one of the image creation functions, such as imagecreatetruecolor.

x1

Upper left x coordinate.

y1

Upper left y coordinate 0, 0 is the top left corner of the image.

x2

Bottom right x coordinate.

y2

Bottom right y coordinate.

color

The fill color. A color identifier created with imagecolorallocate.

Return Values

Returns true on success or false on failure.

Changelog

Version Description
8.0.0 image expects a GdImage instance now; previously, a valid gd resource was expected.

Examples

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:

Output of example : imagedashedline()

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);
?>

See Also

  • imagesetstyle
  • imageline