PHP program related to stringpos() function issue

Question

$text = $_POST['text'];  
$find = $_POST['find'];
$offset = 0;
while ($offset < strlen($text))
{
   $pos = strpos($text, $find, $offset);
   $offset += strlen($find);
   echo "$find found in $pos <br>";
}

There is something wrong with this program. All I want to do is print all the positions in which $find is located in $text.

Tell me what the problem is. Try not to change the while condition. Thanks in advance.

Answer 1

First of all you need to break out of your loop if its not found. And secondly, what I think you want to do is to jump to the point in the $text just after where you found the last $find:

$text = $_POST['text'];  
$find = $_POST['find'];
$offset = 0;
while ($offset < strlen($text))
{
   $pos = strpos($text, $find, $offset);
   // $offset += strlen($find); // removed
   if ( $pos===false ) break;
   $offset = $pos+1;
   echo "$find found in $pos <br>";
}