PHP function imagesetinterpolation()

Availability in versions: PHP 5.5.0

Set the interpolation method

Parameters

Parameter	Data type	Default value	Note
$image	resource	not	An image resource, returned by one of the image creation functions, such as {@link https://www.php.net/manual/en/function.imagecreatetruecolor.php imagecreatetruecolor()}.
$method	int	IMG_BILINEAR_FIXED	The interpolation method, which can be one of the following: IMG_BELL: Bell filter. IMG_BESSEL: Bessel filter. IMG_BICUBIC: Bicubic interpolation. IMG_BICUBIC_FIXED: Fixed point implementation of the bicubic interpolation. IMG_BILINEAR_FIXED: Fixed point implementation of the bilinear interpolation (default (also on image creation)). IMG_BLACKMAN: Blackman window function. IMG_BOX: Box blur filter. IMG_BSPLINE: Spline interpolation. IMG_CATMULLROM: Cubbic Hermite spline interpolation. IMG_GAUSSIAN: Gaussian function. IMG_GENERALIZED_CUBIC: Generalized cubic spline fractal interpolation. IMG_HERMITE: Hermite interpolation. IMG_HAMMING: Hamming filter. IMG_HANNING: Hanning filter. IMG_MITCHELL: Mitchell filter. IMG_POWER: Power interpolation. IMG_QUADRATIC: Inverse quadratic interpolation. IMG_SINC: Sinc function. IMG_NEAREST_NEIGHBOUR: Nearest neighbor interpolation. IMG_WEIGHTED4: Weighting filter. IMG_TRIANGLE: Triangle interpolation.

Return values

bool

Returns true on success, otherwise false on failure.

Additional resources

• https://www.php.net/manual/en/function.imagesetinterpolation.php
• https://www.php.net/manual/en/function.imagecreatetruecolor.php imagecreatetruecolor()}.