imagedashedline

(PHP 4, PHP 5)

imagedashedlineDraw a dashed line

Description

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

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

Parameters

image

An image resource, 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

Always returns true

Examples

Example #1 imagedashedline() example

<?php
// Create a 100x100 image
$im imagecreatetruecolor(100100);
$white imagecolorallocate($im0xFF0xFF0xFF);

// Draw a vertical dashed line
imagedashedline($im50255075$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(100100);
$white imagecolorallocate($im0xFF0xFF0xFF);

// 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($im50255075IMG_COLOR_STYLED);

// Save the image
imagepng($im'./imageline.png');
imagedestroy($im);
?>

See Also

Коментарии

There's a bug till PHP 4.0.4 in this function. You can only draw vertical dashed lines. To draw other dashed lines you can set <ImageSetStyle> to a special dashed line and draw it by <ImageLine>.

Sample code:
<?php
function MDashedLine($image$x0$y0$x1$y1$fg$bg)
{
       
$st = array($fg$fg$fg$fg$bg$bg$bg$bg);
       
ImageSetStyle($image$st);
       
ImageLine($image$x0$y0$x1$y1IMG_COLOR_STYLED);
}
?>
2003-11-19 08:49:00
http://php5.kiev.ua/manual/ru/function.imagedashedline.html
Автор:
I make my own dashedline:

<?
for($l=50;$l<=550;$l+=5)
   {
    if(
$da == 0) { $da 1; }
    elseif(
$da == 1){
   
imageline($bild,$l,50,$l+5,50,$green);
   
$da 0; }
   }
?>

$l is the x-value 
and we have a dashed line :)
2005-07-13 17:17:22
http://php5.kiev.ua/manual/ru/function.imagedashedline.html
The bug reported by 'michi at marel dot at' also exists in PHP version 5.1.1. This functions just works with vertical lines!
2006-02-16 14:07:15
http://php5.kiev.ua/manual/ru/function.imagedashedline.html
You can use the imagepatternedline() function with extra features instead of imagedashedline() to give a visible dashedlines and other any kind of patterned lines on your images. The routine also manages the thickness of the line. Have fun!

<?php
// imagepatternedline() function
// Routine was developed to draw any kind of straight line with thickness. Routine uses imageline() function to draw line.
// Parameters are (similar to imageline() function):
//   $image: (resource) imagefile
//   $xstart, $ystart: (int) x,y coordinates for first point
//   $xend, $yend: (int) x,y coordinates for last point
//   $color: (int) color identifier that created with imagecolorallocate()
// extra parameters:
//   $thickness: (int) thickness of line in pixel
//   $pattern: (string) pattern of line, which repeats continuously while line is being drawed.
//   If there is '1' in the pattern that means the actual dot of line is visible,
//   '0' means dot is not visible (space between two line elements).
//   All characters regard for one pixel. Default: 1 dot wide dashed line with 4-4 dots and spaces.
// Examples for pattern:
// "1" or "" continuous line
// "10" close dotline
// "10000" dotline
// "111111110000001100000011111111" dotline for design drawing
// "111111111100000011000000110000001111111111" double dotline
// some examples for using imagepatternedline():
// imagepatternedline($image,300,300,442,442,$color,200,""); // a square with 200 length of edge and rotated 45 degrees
// imagepatternedline($image,100,200,289,200,$color,100, 
//  "11001100000011001111000011001111110000001100001100"
// ."00001111001100111100000011000000110000110011001100"
// ."11000011111100111111000011001111001111000011110000"
// ."1111001111110011000011000000001100110011"); // barcode 

function imagepatternedline($image$xstart$ystart$xend$yend$color$thickness=1$pattern="11000011") {
   
$pattern=(!strlen($pattern)) ? "1" $pattern;
   
$x=$xend-$xstart;
   
$y=$yend-$ystart;
   
$length=floor(sqrt(pow(($x),2)+pow(($y),2)));
   
$fullpattern=$pattern;
   while (
strlen($fullpattern)<$length$fullpattern.=$pattern;
   if (!
$length) {
      if (
$fullpattern[0]) imagefilledellipse($image$xstart$ystart$thickness$thickness$color);
      return;
   }
   
$x1=$xstart;
   
$y1=$ystart;
   
$x2=$x1;
   
$y2=$y1;
   
$mx=$x/$length;
   
$my=$y/$length;
   
$line="";
   for(
$i=0;$i<$length;$i++){
      if (
strlen($line)==or $fullpattern[$i]==$line[0]) {
         
$line.=$fullpattern[$i];
      }else{
         
$x2+=strlen($line)*$mx;
         
$y2+=strlen($line)*$my;
         if (
$line[0]) imageline($imageround($x1), round($y1), round($x2-$mx), round($y2-$my), $color);
         
$k=1;
         for(
$j=0;$j<$thickness-1;$j++) {
           
$k1=-(($k-0.5)*$my)*(floor($j*0.5)+1)*2;
           
$k2= (($k-0.5)*$mx)*(floor($j*0.5)+1)*2;
           
$k=1-$k;
            if (
$line[0]) {
               
imageline($imageround($x1)+$k1round($y1)+$k2round($x2-$mx)+$k1round($y2-$my)+$k2$color);
               if (
$yimageline($imageround($x1)+$k1+1round($y1)+$k2round($x2-$mx)+$k1+1round($y2-$my)+$k2$color);
               if (
$ximageline($imageround($x1)+$k1round($y1)+$k2+1round($x2-$mx)+$k1round($y2-$my)+$k2+1$color);
            }
         }
         
$x1=$x2;
         
$y1=$y2;
         
$line=$fullpattern[$i];
      }
   }
   
$x2+=strlen($line)*$mx;
   
$y2+=strlen($line)*$my;
   if (
$line[0]) imageline($imageround($x1), round($y1), round($xend), round($yend), $color);
   
$k=1;
   for(
$j=0;$j<$thickness-1;$j++) {
     
$k1=-(($k-0.5)*$my)*(floor($j*0.5)+1)*2;
     
$k2= (($k-0.5)*$mx)*(floor($j*0.5)+1)*2;
     
$k=1-$k;
      if (
$line[0]) {
         
imageline($imageround($x1)+$k1round($y1)+$k2round($xend)+$k1round($yend)+$k2$color);
         if (
$yimageline($imageround($x1)+$k1+1round($y1)+$k2round($xend)+$k1+1round($yend)+$k2$color);
         if (
$ximageline($imageround($x1)+$k1round($y1)+$k2+1round($xend)+$k1round($yend)+$k2+1$color);
      }
   }
}
?>
2010-08-17 14:50:21
http://php5.kiev.ua/manual/ru/function.imagedashedline.html
It doesn't work for horizontal lines. Use imagesetstyle()
2012-08-17 21:45:35
http://php5.kiev.ua/manual/ru/function.imagedashedline.html

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