PHP | imagecreatetruecolor() Function

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The imagecreatetruecolor() function is an inbuilt function in PHP which is used to create a new true-color image. This function returns a blank image of the given size.

Syntax:

resource imagecreatetruecolor( $width, $height )

Parameters: This function accepts two parameters as mentioned above and described below:

$width: This parameter is used to set the width of image.
$height: This parameter is used to set the height of image.

Return Value: This function returns an image resource identifier on success, or False on errors.

Below programs illustrate the imagecreatetruecolor() function in PHP:

Program 1:

<?php 
    
// Set the vertices of polygon 
$values = array( 
            150,  50, // Point 1 (x, y) 
            50, 250,  // Point 2 (x, y) 
            250,  250 // Point 3 (x, y) 
        ); 
      
// Create the size of image or blank image 
$image = imagecreatetruecolor(300, 300); 
    
// Set the background color of image 
$background_color = imagecolorallocate($image,  0, 153, 0); 
     
// Fill background with above selected color 
imagefill($image, 0, 0, $background_color); 
   
// Allocate a color for the polygon 
$image_color = imagecolorallocate($image, 255, 255, 255); 
     
// Draw the polygon 
imagepolygon($image, $values, 3, $image_color); 
     
// Output the picture to the browser 
header('Content-type: image/png'); 
     
imagepng($image); 
?> 

output:

Program 2:

<?php 
   
// Create the size of image or blank image. 
$image = imagecreatetruecolor(500, 300); 
   
// Display the height of image. 
echo imagesy($image); 
   
?> 