making a .zip with php.

anyone able to help me creat a zipped file.

i will select the files that need to be ziped through a script in my code.

but i dont know how to do it.

for example these are the files i want to zip.

testsite/xml/test.xml
testsite/pictures/ picture1.jpg
testsite/pictures/ picture2.jpg
testsite/pictures/ picture7.jpg
testsite/pictures/ picture3.jpg
testsite/pictures/ picture21.jpg

and i want to output the zip file into this directory.

testsite/zips/test.zip

anyone able to help please.

cheers aron.