> I need to check that the substring " R" (that's a space followed by an
> uppercase R) is not contained within my haystack.
Just one way to do it:
$strings[] = 'Blah Blah R 99.99';
$strings[] = 'Blah Blah R99.99';
$strings[] = 'Blah Blah 99.99CR';
foreach($strings as $value) {
if (preg_match('/\sR/', $value)) {
echo 'A match was found in '.$value.'<br />';
} else {
echo 'A match was not found '.$value.'<br />';
}
}
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