How to check a string for certain words?

[Anon]

How can I check a string supplied via form for certain words? For example: check to see if the user entered text contains brown and dog - if it does, respond in a certain way, if it contains brown and cat, respond in a different way, if it contains neither, respond in a third way. Thanks for your help.

[matto]

look at the strings section in the manual.
you could use regular expressions, stristr() etc.

[amcgrath]

try this:
$string = "the brown dog is quick";
$word_list = explode(",","quick,brown,dog");

$toekn = strtok($string," ");
while($token) {
if (in_array($token,$word_list)) {

// do scoring methodology here

}
$token = strtok(" ");
}

[[deleted]]

Uhm... that's cool an all, but it kind of totally goes right passed the question doesn't it?

Anyway, staying OT for a moment, look at this:
$sString = 'the brown dog is quick';
$sWordList = 'quick brown dog';

$aString = explode(' ', $sString);
$aWordList = explode(' ', $sWordList);

$aIntersect = array_intersect($aString, $aWordList);
print_r($aIntersect);
$aDiff = array_diff($aString, $aWordList);
print_r($aDiff);

[amcgrath]

I kinda think both of our responses answer it, don't you? (I like your way, btw).