function misc_get_keywords_alnum($s, $keyword_size = 3)
{
if (strlen(trim($s)) < $keyword_size) {
return false;
}
for ($i = 0; $s[$i]; $i++) {
if (!isalnum($s[$i]) && $s[$i] != '_' && $s[$i] != '.') {
return false;
}
}
return true;
}
$a = -$a;
}
if ($b < 0) {
$b = -$b;
}
$y1 = $gbot - $a;
$y2 = $gbot - $b;
$CC = $dv[$C][$x];
//error_log("y1 = $y1, y2 = $y2, x1 = $x1, x2 = $x2, ($CC)");
if ($CC == '!') {
ImageLine($png, $x1, $y1, $x2, $y2, $col[$Y1]);
} else {
if ($dv[$C][$x] == '"') {
ImageLine($png, $x1, $y1, $x2, $y2, $red);
} else {
if (isalnum($dv[$C][$x]) && $R >= 0) {
$y3 = (int) ($gbot - $dv[$R][$x] * $ymult);
// the next two lines center the code and
// stop the bird dropping just short of it.
$lodrop = $y2 + 8 > $gbot ? $gbot : $y2 + 8;
ImageDashedLine($png, $x2, $lodrop, $x2, $y3, $red);
if ($dv[$C][$x] != '#') {
ImageString($png, 2, $x2 - 2, $y2, $dv[$C][$x], $blue);
}
}
}
}
if ($cnv == 1) {
error_log("cnv ({$Y1}:{$x} = {$dv[$Y1]}[{$x}])");
}
}
