用偏移量找到任意一个字符的位置 - php？

Question

I'm trying to find the position of any of a number of characters, but need to be able to set a search offset.

This is precisely the functionality of strpos() but matching any of a number of characters rather than a single string/character. If strpos() would accept an array of $needles it would be exactly what I need (assuming it returns the position of the earliest match in $haystack).

strpbrk() has exactly what's needed in terms of matching a set of characters, but this does not allow an offset so that I can move along the string after each successful match.

This seems an odd thing to be missing from the PHP string functions, is there something I am missing?

Here is a code summary:

  while($pos=strpos($el->text(), '*_-!`' ,$el->position())!==FALSE){
      $el->position($pos);

       foreach ($HandlerTypes as $Type){
          // Note: $el->position is modified within this function
          $this->markSpan($Type, $el);
       }
   }

Where I'm looking for any of *, _, -, ! or ` rather than the string of them. Any marker might appear more than once in the string.

thanks.

Answer 1

Regular expressions to the rescue!

$s = 'skipbfoobarxarjar';
preg_match_all('~[bxj]~', $s, $m, PREG_OFFSET_CAPTURE, 5);
print_r($m[0]);

Result:

[0] => Array
    (
        [0] => b
        [1] => 8
    )

[1] => Array
    (
        [0] => x
        [1] => 11
    )

[2] => Array
    (
        [0] => j
        [1] => 14
    )