strrpos for multiple chars

[minestrone]

Hi,

i wonder if anyone can give me a hand with a little problem i have

I have a strrpos call which looks for a '.' like so...

$ourActuallyStartPosition = strrpos( $ourTheoreticalStartString , '.' ) ;

but i'm wanting it to look for '.' and '?'.

is this possible to do in the actual function call? Like a reg expression thing?

I apologise for the simplicity of my question, i'm still learning PHP

Thanks in advance,

David.

[Weedpacket]

If those are all you're looking for then using a regular expression would be messier than not using one.

$ourActuallyStartPosition = max(
    strrpos( $ourTheoreticalStartString , '.' ),
    strrpos( $ourTheoreticalStartString , '?' ) 
);

[minestrone]

Weedpacket wrote:

If those are all you're looking for then using a regular expression would be messier than not using one.

$ourActuallyStartPosition = max(
    strrpos( $ourTheoreticalStartString , '.' ),
    strrpos( $ourTheoreticalStartString , '?' ) 
);

cheers weedpacket, works a treat.

still getting the hang of this PHP thing. first time i've had to write a site in PHP and getting the hang of all the functions is still an issue for me. suppose its just a matter of time.

cheers again

p.s. cool avatar. alexi is the man.

[Installer]

Expanding on Weedpacket's idea, here's a function that mimics strpos(), taking the search values in an array. It returns the position of the first-found array element (false if none is found), and the string can be stepped through using $offset. It also triggers a warning if the offset is invalid.

function strarrpos($str, $char_arr, $offset = 0)
{
    $found = false;
    foreach ($char_arr as $char) {
        if (($pos = strpos($str, $char, $offset)) !== false) {
            $pos_arr[] = $pos;
            $found = true;
        }
    }
    if ($found) {
        return min($pos_arr);
    } else {
        return false;
    }
}

Example:

$string = 'adcde,defgH';
$chars = array('xy', 'de', 'H', ',');
$pos = 0;
while (($pos = strarrpos($string, $chars, $pos)) !== false) {
    echo $pos . '<br />';
    $pos++;
}