imagecopymergegray

Supported Versions: PHP 4 >= 4.0.6, PHP 5, PHP 7, PHP 8
Copy and merge part of an image with gray scale
<?php imagecopymergegray(    GdImage $dst_image,    GdImage $src_image,    int $dst_x,    int $dst_y,    int $src_x,    int $src_y,    int $src_width,    int $src_height,    int $pct): bool