PHP | imagerotate() Function

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The imagerotate() function is an inbuilt function in PHP which is used to rotate an image with a given angle in degrees. The rotation center of the image is center.

Syntax:

resource imagerotate( $image, $angle, $bgd_color, $ignore_transparent = 0 )

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

$image: It is returned by one of the image creation functions, such as imagecreatetruecolor(). It is used to create size of image.
$angle: This parameter holds the rotation angle in degrees. The rotation angle is used to rotate an image in anticlockwise direction.
$bgd_color: This parameter holds the background color of uncovered zone after rotation.
$ignore_transparent: If this parameter set and non-zero then transparent colors are ignored.

Return Value: This function returns an image resource for the rotated image on success, or False on failure.

Below programs illustrate the imagerotate() function in PHP:

Program 1:

<?php  
    
// Assign image file to variable  
$image_name =  
'https://media.zambiatek.com/wp-content/uploads/zambiatek-15.png';  
     
// Load image file  
$image = imagecreatefrompng($image_name);   
  
// Use imagerotate() function to rotate the image 
$img = imagerotate($image, 180, 0); 
  
// Output image in the browser  
header("Content-type: image/png");  
  
imagepng($img);  
  
?>  

Output:

Program 2:

<?php  
    
// It create the size of image or blank image.  
$image = imagecreatetruecolor(500, 300);  
     
// Set the background color of image.  
$bg = imagecolorallocate($image, 205, 220, 200);  
     
// Fill background with above selected color.  
imagefill($image, 0, 0, $bg);  
    
// Set the color of an ellipse.  
$col_ellipse = imagecolorallocate($image, 0, 102, 0);  
     
// Function to draw the filled ellipse.  
imagefilledellipse($image, 250, 150, 400, 250, $col_ellipse);  
  
// Use imagerotate() function to rotate the image 
$img = imagerotate($image, 90, 0); 
  
// Output image in the browser  
header("Content-type: image/png");  
  
imagepng($img);  
  
?>  