This function seems to do the same thing as photoshop feture convas size, you set size of convas and position of your image's top left corner (x,y) inside that convas.PHP - Manual: Imagick::resetImagePage
2025-11-04
(PECL imagick 2 >= 2.3.0, PECL imagick 3)
Imagick::resetImagePage — Reset image page
The page definition as a string. The string is in format WxH+x+y. 此方法在Imagick基于ImageMagick 6.3.6以上版本编译时可用。
page
       The page definition. For example 7168x5147+0+0
      
   成功时返回 true。
  
官方地址:https://www.php.net/manual/en/imagick.resetimagepage.php