SunshinePHP 2020 CFP Started

imagescale

(PHP 5 >= 5.5.0, PHP 7)

imagescaleScale an image using the given new width and height

Descrierea

imagescale ( resource $image , int $new_width [, int $new_height = -1 [, int $mode = IMG_BILINEAR_FIXED ]] ) : resource

imagescale() scales an image using the given interpolation algorithm.

Notă:

Unlike many of other image functions, imagescale() does not modify the passed image; instead, a new image is returned.

Parametri

image

O resursă - imagine, întoarsă de una din funcțiile de creare a imaginilor, cum ar fi imagecreatetruecolor().

new_width

The width to scale the image to.

new_height

The height to scale the image to. If omitted or negative, the aspect ratio will be preserved.

Precauţie

You should always provide the height if using PHP 5.5.18 or earlier, or PHP 5.6.2 or earlier, as the aspect ratio calculation was incorrect.

mode

One of IMG_NEAREST_NEIGHBOUR, IMG_BILINEAR_FIXED, IMG_BICUBIC, IMG_BICUBIC_FIXED or anything else (will use two pass).

Notă: IMG_WEIGHTED4 is not yet supported.

Valorile întoarse

Return the scaled image resource on success sau FALSE în cazul eșecului.

Istoricul schimbărilor

Versiune Descriere
5.5.19/5.6.3 The calculation of the height if new_height was negative or omitted was fixed; prior to these versions, the aspect ratio was not maintained correctly.

A se vedea și

imagecopyresized() - Copy and resize part of an image imagecopyresampled() - Copy and resize part of an image with resampling

add a note add a note

User Contributed Notes

There are no user contributed notes for this page.
To Top