Apply a list of regular expressions in PHP

I have a long list of regular expressions in an ignore.txt, and another long list in an include.txt file. What would be the quickest way to apply these using PHP against data contained in a sample.html file such that any matches found in includ开发者_JAVA技巧e are captured, but then anything matching in ignore.txt is excluded?

If your include.txt and ignore.txt files are setup so that they're only regular expressions, and there's one expression per line, you can use PHP's file() function. That will load the files into an array where each individual line is an element in the array. You can use file_get_contents() to load the sample.html file in as a string.

preg_match() or preg_match_all() do not actually take arrays as input, like preg_replace() does. You will need to loop over your array of expressions using something like foreach and applying an individual call to one of the matching functions to get your results.

I think preg_match_all() will suit your needs best, because it sounds like you're wanting to pull all of the matches out of the entire file, not just the first one. Once you have your full list of matches, then you'd apply your filter using the data from ignore.txt in a similar manner.

the quickest way would be to let the shell do the job

$result = `cat sample.html | egrep -f include.txt | egrep -vf ignore.txt`;