using PHP GD

Rotate an image and choose the uncovered background color

imagerotate() returns a new GD image. Destroy both images when you no longer need them.

<?php
$source = imagecreatefromjpeg('photo.jpg');
$background = imagecolorallocate($source, 255, 255, 255);
$rotated = imagerotate($source, 30, $background);

imagejpeg($rotated, 'rotated.jpg', 90);
imagedestroy($rotated);
imagedestroy($source);
?>

Current example first; the original tutorial examples below are retained and cleaned up for continued learning.

<?php
header ("Content-Type: image/jpeg");

$file_name='../images/top2.jpg'; // Image collected
$angle='180';    // Angle of rotation is set
$img_source = imagecreatefromjpeg($file_name); // Image created

$img_rotated = imagerotate($img_source, $angle, 0); // Rotate the image

imagejpeg($img_rotated); // Output Displayed

imagedestroy($img_source);  // Free the memory 
imagedestroy($img_rotated); // Free the memory
?>

Above code is saved as gd-imagerotate-demo.php and displayed in this page, HTML code is here.

<img src=gd-imagerotate-demo.php>

Syntax

imagerotate($source_image,$angle,$bg_color,$int_transparent)

$source_image : Image resource created before
$angle: Rotational angle in degree
$bg_color: Color of the uncovered zone after rotation
$int_transparent: Transparent colors are ignored if value is given and not 0

Using background colour

header ("Content-Type: image/jpeg");
$file_name='../images/top2.jpg';
$angle='45'; // Angle of rotation in degree
$img_source = imagecreatefromjpeg($file_name);
$bg_color = ImageColorAllocate ($img_source, 4, 20, 204);
// Rotate
$img_rotated = ImageRotate($img_source, $angle, $bg_color, 0);
// Output Display 
imagejpeg($img_rotated);
// Free the memory
imagedestroy($img_source);
imagedestroy($img_rotated);

Above code is saved as gd-imagerotate-demo2.php and displayed in this page, HTML code is here.

<img src=gd-imagerotate-demo2.php>

GD functions ImageString() to add text to Image

Subhendu Mohapatra

Author & Instructor at plus2net

I write and maintain practical tutorials on Python, PHP, SQL, JavaScript, HTML, jQuery, and web development at plus2net. The tutorials focus on clear explanations, working examples, and code that readers can test and adapt while learning.

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Rotate Images with imagerotate()

Rotate an image and choose the uncovered background color

Using background colour

Subhendu Mohapatra