imageflip(3) [php man page]
IMAGEFLIP(3) 1 IMAGEFLIP(3) imageflip - Flips an image using a given mode SYNOPSIS
bool imageflip (resource $image, int $mode) DESCRIPTION
Flips the $image image using the given $mode. PARAMETERS
o $ image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3). o $mode - Flip mode, this can be one of the IMG_FLIP_* constants: +--------------------+---------------------------------------------------+ | Constant | | | | | | | Meaning | | | | +--------------------+---------------------------------------------------+ | | | |IMG_FLIP_HORIZONTAL | | | | | | | Flips the image horizontally. | | | | | | | | IMG_FLIP_VERTICAL | | | | | | | Flips the image vertically. | | | | | | | | IMG_FLIP_BOTH | | | | | | | Flips the image both horizontally and verti- | | | cally. | | | | +--------------------+---------------------------------------------------+ RETURN VALUES
Returns TRUE on success or FALSE on failure. EXAMPLES
Example #1 Flips an image vertically This example uses the IMG_FLIP_VERTICAL constant. <?php // File $filename = 'phplogo.png'; // Content type header('Content-type: image/png'); // Load $im = imagecreatefrompng($filename); // Flip it vertically imageflip($im, IMG_FLIP_VERTICAL); // Output imagejpeg($im); imagedestroy($im); ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example: Vertically flipped image Example #2 Flips the image horizontally This example uses the IMG_FLIP_HORIZONTAL constant. <?php // File $filename = 'phplogo.png'; // Content type header('Content-type: image/png'); // Load $im = imagecreatefrompng($filename); // Flip it horizontally imageflip($im, IMG_FLIP_HORIZONTAL); // Output imagejpeg($im); imagedestroy($im); ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example: Horizontally flipped image NOTES
Note This function is only available if PHP is compiled with the bundled version of the GD library. PHP Documentation Group IMAGEFLIP(3)
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IMAGEROTATE(3) 1 IMAGEROTATE(3) imagerotate - Rotate an image with a given angle SYNOPSIS
resource imagerotate (resource $image, float $angle, int $bgd_color, [int $ignore_transparent]) DESCRIPTION
Rotates the $image image using the given $angle in degrees. The center of rotation is the center of the image, and the rotated image may have different dimensions than the original image. PARAMETERS
o $ image -An image resource, returned by one of the image creation functions, such as imagecreatetruecolor(3). o $angle - Rotation angle, in degrees. The rotation angle is interpreted as the number of degrees to rotate the image anticlockwise. o $bgd_color - Specifies the color of the uncovered zone after the rotation o $ignore_transparent - If set and non-zero, transparent colors are ignored (otherwise kept). RETURN VALUES
Returns an image resource for the rotated image, or FALSE on failure. CHANGELOG
+--------+---------------------------------------------------+ |Version | | | | | | | Description | | | | +--------+---------------------------------------------------+ | 5.5.0 | | | | | | | This function is now affected by the interpola- | | | tion method set by the imagesetinterpolation(3) | | | function. | | | | | 5.1.0 | | | | | | | $ignore_transparent was added. | | | | +--------+---------------------------------------------------+ EXAMPLES
Example #1 Rotate an image 180 degrees This example rotates an image 180 degrees - upside down. <?php // File and rotation $filename = 'test.jpg'; $degrees = 180; // Content type header('Content-type: image/jpeg'); // Load $source = imagecreatefromjpeg($filename); // Rotate $rotate = imagerotate($source, $degrees, 0); // Output imagejpeg($rotate); // Free the memory imagedestroy($source); imagedestroy($rotate); ?> The above example will output something similar to:[NOT DISPLAYABLE MEDIA]Output of example : Rotate an image 180 degrees NOTES
Note This function is affected by the interpolation method set by imagesetinterpolation(3). SEE ALSO
imagesetinterpolation(3). PHP Documentation Group IMAGEROTATE(3)