How to find the numeric position of the substring with an offset?
if i want to check for an occurance of a string in some text i can use,
strpos($some_string,"word"); this return first char position of the string.
but what if i want to search for the occurance of a string between a set starting point and end point in the text.
so if the $text = "hello my name is fred blogs and i live in a house"
so strpos($text,"fred"); would give about 18
what if i had $text = "hello my name is fred blogs and i live have a brother fred as well and a granda called fred as well"
now i know that the 2nd "fred" in this string lies between positions A & B so do you strpos between these two positions?
strpos() takes offset as a third argument so you can do:
strpos($text, "fred", 16);
if you know the position of point A and B than you can make use of
strpos(substr($text,POINT A POSITION,POINT B POSITION),"fred");
You can use the 3rd paramater, the offset, to start further in the string. To make it more dynamic:
$string = "fred"; strpos($text, $string, strpos($text, $string)+strlen($string));
This will find the next occurence after the first found. I use the strpos()+strlen() nested as 3rd parameter to make it start with an offset