Need help with a Regular Expression / PHP

Can someone please help me with the regular expression or php code that I need to do the following.

I have a huge list of keywords and want to remove lines that contain certain $words = array("tickets","ticketmaster");

keyword list example
dave matthews band ticketmaster
dave matthews band tickets
daytona 500 tickets
daytona race tickets
dc motor
dc united tickets
heather lee
heather wayne
heat press
heat pump
heavy metal concert tickets
heels
heins field
helga sven
hello kitty new
help u sell real estate
help wanted
help wanted jobs
hemp clothes
hemp clothing
henredon furniture

Keyword List After lines with $words have been removed
dc motor
heather lee
heather wayne
heat press
heat pump
heels
heins field
helga sven
hello kitty new
help u sell real estate
help wanted
help wanted jobs
hemp clothes
hemp clothing
henredon furniture

Thanks

 

i didnt try but it must work

'#([\n]+)([^\n]+)tickets([^\n]+)([\n]+)#i'

Code (markup):

 

How big is "huge" and how much memory does PHP have available to it ?

If the list is small compared to the available memory, something like this will do.

$str = file_get_contents('keywords.txt');
$str = preg_replace('#^.*\b' . implode('\b|\b', $words) . '\b.*$#sim', "\n", $str);
$str = preg_replace('#\n{2,}#', "\n", $str);

Code (markup):