preg_match_all()

[deep]

Hello,

What it the text Im checking has 200 000 words "hello" but I only need to know if there are > 20.... preg_match_all() will be vary slow in that case...??

Is ther a better way to only check is there are more then 20 "hello" words in this case?

Thanks!

[lth2h]

I haven't tested this so I don't know if it will be faster or not (or even if it is bug and typo free)

$arrString = split(" ", $longstringofhellos);
$arrStrCount = array();
foreach ($arrString as $value) {

 $arrStrCount[$value]++;
 if (($value == "Hello") && ($arrStrCount["Hello"] > 20)) {
      break;
 }


}

Like I said I haven't tested it, so it might actually be slower. The memory needed for the $arrString is probably more than whatever is needed for one of PHP's functions.

[xblue]

You might also want to check if [man]substr_count[/man] meets your needs. However, this does not care about word boundaries as lth2h's approach partly does, nor is case-insensitive.

The preg functions would be capable of both, but may be overkill if you do not really need it.

[Weedpacket]

I wonder.....

preg_match('/(.*?\bhello\b){20}/is', $text);

Yup; will stop searching once it's found 20.

[deep]

thanks all !