Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images

# imagesavealpha

(PHP 4 >= 4.3.2, PHP 5, PHP 7)

imagesavealpha — Set the flag to save full alpha channel information (as opposed to single-color transparency) when saving PNG images

### Descrierea

imagesavealpha ( resource `$image` , bool `$saveflag` ) : bool

imagesavealpha() sets the flag to attempt to save full alpha channel information (as opposed to single-color transparency) when saving PNG images.

You have to unset alphablending (imagealphablending($im, false)), to use it.

Alpha channel is not supported by all browsers, if you have problem with your browser, try to load your script with an alpha channel compliant browser, e.g. latest Mozilla.

### Parametri

`image`

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

`saveflag`

  Whether to save the alpha channel or not. Default to `FALSE`.

### Valorile întoarse

Întoarce valoarea `TRUE` în cazul succesului sau `FALSE` în cazul eșecului.

### Exemple

Example #1 imagesavealpha() example

`<?php
// Load a png image with alpha channels
$png = imagecreatefrompng('./alphachannel_example.png');
// Do required operations
// Turn off alpha blending and set alpha flag
imagealphablending($png, false);
imagesavealpha($png, true);
// Output image to browser
header('Content-Type: image/png');
imagepng($png);
imagedestroy($png);
?>`

### A se vedea și

- imagealphablending() - Set the blending mode for an image