PHP imagecopymergegray() Function (original) (raw)

Last Updated : 11 Jul, 2025

The imagecopymergegray() function is an inbuilt function in PHP that is used to copy and merge the part of an image with a grayscale. This function copies the part of the source image into the destination image. This function returns true on success or false on failure.

Syntax:

bool imagecopymergegray ( dstimage,dst_image, dsti​mage,src_image, dstx,dst_x, dstx​,dst_y, srcx,src_x, srcx​,src_y, srcw,src_w, srcw​,src_h, $pct )

parameters: This function accepts nine parameters as mentioned above and described below:

• $dst_image: This parameter is used to set the destination image link resource.
• $src_image: This parameter is used to set the source image link resource.
• $dst_x: This parameter is used to set the x-coordinate of the destination point.
• $dst_y: This parameter is used to set the y-coordinate of the destination point.
• $src_x: This parameter is used to set the x-coordinate of the source point.
• $src_y: This parameter is used to set the x-coordinate of the source point.
• $src_w: This parameter is used to set source width.
• $src_h: This parameter is used to set source height.
• $pct: This parameter is used to change the grayscale according to pct.Therangeofpct. The range of pct.Therangeofpct is 0 to 100 where 0 is fully grayscale and 100 is unchanged. If pct=0,thennoactionistaken,andwhenpct = 0, then no action is taken, and when pct=0,thennoactionistaken,andwhenpct = 100 then this function behaves similarly to imagecopy() function for palette images, except ignoring the alpha components. It implements alpha transparency for true color images.

Return Value: This function returns true on success or false on failure. The below programs illustrate the imagecopymergegray() function in PHP.

Program 1:

php `

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Output:

Program 2:

php `

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Output:

Related Articles:

• PHP | imagecopy() Function
• PHP | imagecopymerge() Function

Reference: https://www.php.net/manual/en/function.imagecopymergegray.php