PHP Imagecreate( ) Function

Image create ( ) function is another inbuilt PHP function mainly used to create a new image. The function returns the given image in a specific size. We need to define the width and height of the required image. Instead of the image create ( ) function, we can also use other creative functions like imagecreatetruecolor( ), which is a better alternative as it will return a better image quality.

Syntax

In PHP, imagecreate( ) function follows the following syntax.

S.No	Parameter	Description	Optional / mandatory
1	$ width	This parameter is used to define the image's width that we want to display.	Mandatory
2	$ height	This parameter is used to define the height of the image that we want to display	Mandatory

The image creates ( ) function returns the resource identifier of an image on successful execution of the program and FALSE on a failed attempt.

Examples of Imagecreate( ) Function

Example 1: PHP program to display the basic use of imagecreate( ) function

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF - 8">
  <meta http - equiv="X - UA - Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial - scale=1.0">
  <title>PHP</title>
</head>
<body>
<?php	
// to define the size of the image
$image= imagecreate(400, 200); 
// to define the background color of the image
$background-color= imagecolorallocate($image, 0, 150, 2); 
// to define the text color of the image
$text-color= imagecolorallocate($image, 255, 255, 255);  
// function which will define the character to be displayed on the screen
Imagestring($image, 5, 180, 100,  "GOOD MORNING EVERYONE", $text-color);
Imagestring($image, 3, 160, 120,  "HELLO WORLD", $text-color);
Header("Content - Type: image/png");
Imagepng($image);
Imagedestroy($image); 
?>
</body>
</html>

Output

The above code shows the following Output.

Here in this program, we have declared various variables like $image to define the size of the image that we require, $background color to define the color of background we require, $text color to define the color of text we require. We have used the image string ( ) function to declare the string we want to display as an image. To display the output of the image, we have used an inbuilt PHP command header and imagepng to display on the browser.

Example 2: PHP program to display the use of imagecreate( ) function

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF - 8">
  <meta http - equiv="X - UA ? Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial - scale=1.0">
  <title>PHP</title>
</head>
<body>
<?Php
// to define the size of the image
   $image= imagecreate( 400,200);
// to define the background color of the image
   $background-color = imagecolorallocate($image,0, 155, 2);
// to define the text color of the image
   $text-color = imagecolorallocate($image,255, 255, 255);
// These function will define the character to be displayed on the screen
   Imagestring($image,13,151,121,"this is text 1", $text-color);
   Imagestring($image,4,151,101,"this is text 2", $text-color);
   Imagestring($image,10,151,81," this is text 3", $text-color);
   Imagestring($image,13,151,61," this is text  4", $text-color);
   Header("Content - Type: image/png");
   Imagepng($image);
   Imagedestroy($image);
?>
</body>
</html>

Output

This PHP code gives the following output.

Example 3: PHP program to display the use of imagecreate( ) function to draw a polygon.

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF - 8">
  <meta http - equiv="X ? UA - Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial - scale=1.0">
  <title>PHP</title>
</head>
<body>
<?php 
// to define the size of the image
$image = imagecreate(400, 200);
// to define the vertices of the polygon we need to define
$values = array(
            51 ,  51,  // Point 1 (x, y)
            51 , 251 ,  // Point 2 (x, y)
            251 , 51 ,  // Point 3 (x, y)
            251 ,  251 // Point 4 (x, y)
        );
// to define the background color of the image
$background-color = imagecolorallocate($image,  151,210,181 );    
Imagefill( $image, 0, 0, $background-color);  
// to define the text color of the polygon
$text-color = imagecolorallocate($image, 255, 255, 255);    
// polygon
imagepolygon($image, $values, 4, $text-color);    
header('Content - type: image/png');    
imagepng($image);
?>
</body>
</html>

Output

The above code draws the polygon as an output.

Here in this program, we have declared various variables like $image to define the size of the image that we require, $background color to define the color of background we require, $text color to define the color of text we require, an array $values to set the coordinates of the polygon we need to declare, and we have used image polygon ( ) function to display the polygon we want to display as an image, to display the output of the image we have used an inbuilt PHP command header and imagepng to display on browser.

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