function compare_like($value1, $value2)
{
static $patterns = array();
// Lookup precomputed pattern
if (isset($patterns[$value2])) {
$pat = $patterns[$value2];
} else {
// Calculate pattern
$rc = 0;
$mod = "";
$prefix = "/^";
$suffix = "\$/";
// quote regular expression characters
$str = preg_quote($value2, "/");
// unquote \
$str = str_replace("\\\\", "\\", $str);
// Optimize leading/trailing wildcards
if (substr($str, 0, 1) == '%') {
$str = substr($str, 1);
$prefix = "/";
}
if (substr($str, -1) == '%' && substr($str, -2, 1) != '\\') {
$str = substr($str, 0, -1);
$suffix = "/";
}
// case sensitive ?
if (!LIKE_CASE_SENSITIVE) {
$mod = "i";
}
// setup a StringParser and replace unescaped '%' with '.*'
$sp = new StringParser();
$sp->setConfig(array(), "\\", array());
$sp->setString($str);
$str = $sp->replaceCharWithStr("%", ".*");
// replace unescaped '_' with '.'
$sp->setString($str);
$str = $sp->replaceCharWithStr("_", ".");
$pat = $prefix . $str . $suffix . $mod;
// Stash precomputed value
$patterns[$value2] = $pat;
}
return preg_match($pat, $value1);
}
