PHP | GmagickDraw polyline() Function

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The GmagickDraw::polyline() function is an inbuilt function in PHP which is used to draw a polyline using the current stroke, stroke width, and fill color or texture, using the specified array of coordinates.

Syntax:

GmagickDraw GmagickDraw::polyline( array $coordinates_array )

Parameters: This function accepts a single parameter $coordinates_array which is used to hold the coordinates of the point as an array.

Return Value: This function returns GmagickDraw object on success.

Exceptions: This function throws GmagickDrawException on error.

Used Image:

Below examples illustrate the GmagickDraw::polyline() function in PHP:

Program 1: Drawing over an image

<?php 
  
// Create a new Gmagick object 
$gmagick = new Gmagick('zambiatek.png'); 
  
// Create a GmagickDraw object 
$draw = new GmagickDraw(); 
  
// Set the fill color 
$draw->setFillColor('#0E0E0E'); 
  
// Set the stroke color 
$draw->setstrokecolor('green'); 
  
// Set the stroke width 
$draw->setStrokeWidth(5); 
  
// Create a polygonline 
$draw->polyline([ 
    ['x' => 100, 'y' => 50], 
    ['x' => 40, 'y' => 150], 
    ['x' => 480, 'y' => 150], 
    ['x' => 110, 'y' => 75], 
]); 
  
// Use of drawimage function 
$gmagick->drawImage($draw); 
  
// Display the output image 
header("Content-Type: image/png"); 
echo $gmagick->getImageBlob(); 
?> 

Output:

Program 2: Drawing from scratch

<?php 
  
// Create a new Gmagick object 
$gmagick = new Gmagick('zambiatek.png'); 
  
// Create a GmagickDraw object 
$draw = new GmagickDraw(); 
  
// Draw rectangle for background 
$draw->rectangle(-10, -10, 800, 400); 
  
// Set the fill color 
$draw->setFillColor('white'); 
  
// Set the stroke color 
$draw->setstrokecolor('red'); 
  
// Set the stroke width 
$draw->setStrokeWidth(5); 
  
// Create a polygonline 
$draw->polyline([ 
    ['x' => 400, 'y' => 0], 
    ['x' => 40, 'y' => 170], 
    ['x' => 480, 'y' => 150], 
    ['x' => 110, 'y' => 5], 
]); 
  
// Use of drawimage function 
$gmagick->drawImage($draw); 
  
// Display the output image 
header("Content-Type: image/png"); 
echo $gmagick->getImageBlob(); 
?> 