[SOLVED] I wish to use preg match to match two or more keywords,

[ted_chou12]

using preg match to match two or more keywords, so that the result is not limited by the position of the words, and is there a way to make preg match case insensitive?

So that when searching for "good bad":

This is Good and Bad

would match instead of just:

This is good bad

Thanks.

Ted

[effigy]

<pre>
<?php

$string = 'This is Good and Bad';
$search = 'good bad';

// Separate words
$words = preg_split('/\s+/', $search);
// Loop through words
foreach ($words as $word) {
	// Build pattern
	$pattern = '/\b' . preg_quote($word, '/') . '\b/i';
	// Execute
	echo "Looking for <b>$word</b> with <b>$pattern</b>...";
	echo preg_match($pattern, $string) ? 'Matched' : 'Did not match' ;
	echo '<br>';
}
?>
</pre>

[ted_chou12]

thanks, I have a question about \b, the manual says that syntax means word boundary, but what does word boundary mean?

Thanks,

Ted

[effigy]

Word Boundaries

[Wildbug]

From the manual:

 

\b

word boundary

\B

not a word boundary

 

"A word boundary is a position in the subject string where the current character and the previous character do not both match \w or \W (i.e. one matches \w and the other matches \W), or the start or end of the string if the first or last character matches \w, respectively."

 

\w

any "word" character

\W

any "non-word" character

 

"A "word" character is any letter or digit or the underscore character, that is, any character which can be part of a Perl "word". The definition of letters and digits is controlled by PCRE's character tables, and may vary if locale-specific matching is taking place. For example, in the "fr" (French) locale, some character codes greater than 128 are used for accented letters, and these are matched by \w."