Using an array as needles in strpos

Question

How do you use the strpos for an array of needles when searching a string? For example:

$find_letters = array('a', 'c', 'd'); $string = 'abcdefg';  if(strpos($string, $find_letters) !== false) {     echo 'All the letters are found in the string!'; } 

Because when using this, it wouldn't work, it would be good if there was something like this

Answer 1

@Dave an updated snippet from http://www.php.net/manual/en/function.strpos.php#107351

function strposa($haystack, $needles=array(), $offset=0) {         $chr = array();         foreach($needles as $needle) {                 $res = strpos($haystack, $needle, $offset);                 if ($res !== false) $chr[$needle] = $res;         }         if(empty($chr)) return false;         return min($chr); } 

How to use:

$string = 'Whis string contains word "cheese" and "tea".'; $array  = array('burger', 'melon', 'cheese', 'milk');  if (strposa($string, $array, 1)) {     echo 'true'; } else {     echo 'false'; } 

will return true, because of array "cheese".

Update: Improved code with stop when the first of the needles is found:

function strposa(string $haystack, array $needles, int $offset = 0): bool  {     foreach($needles as $needle) {         if(strpos($haystack, $query, $offset) !== false) {             return true; // stop on first true result         }     }      return false; } $string = 'This string contains word "cheese" and "tea".'; $array  = ['burger', 'melon', 'cheese', 'milk']; var_dump(strposa($string, $array)); // will return true, since "cheese" has been found