Confused with PHP

[marky]

Sorry but I'm new to all of this!

Using Powershell I can find if PDF pages have colour using:

$colour = convert "$PDF" -colorspace HSL -channel G -separate -format %[fx:mean] info:
echo $colour

0 = B/W
>0 = colour

All is well.

I want to do this on my hosted website using PHP but don't know how!

Thanks in advance.

[snibgo]

I don't do PHP, but the IM PHP forum viewforum.php?f=10 has plenty of examples to get you started. The "exec()" method seems to be easiest.

[marky]

Thank you. To get a clearer idea I am using

exec('/usr/bin/convert "logo1.bmp" -colorspace HSL -channel G -separate -thumbnail 200x200 -format %[fx:mean] info: ');
I cannot get the 'info' bit returned. I have already looked through the area you mentioned but could not find anything?

[marky]

Ok, got it!

exec('/usr/bin/convert "logogrey.bmp" -colorspace HSL -channel G -separate -format %[fx:mean] info:',$return_info );
echo $return_info[0];

It was the [0] bit as it;s an array being returned.

[Bonzo]

An alternate method:

Code: Select all

$colour = exec('/usr/bin/convert "logogrey.bmp" -colorspace HSL -channel G -separate -format %[fx:mean] info:' );