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substr_count

Substr_count function returns the number of occurrences of one string within another string. The function substr_count admits 4 parameters:

  • where to look;
  • what to look for;
  • starting character (optional);
  • number of characters to search (optional);
For example: 





 $ Where = "mrwebmaster is the portal of the Italian webmaster";







 $ What = "webmaster";







 echo substr_count ($ where, $ what);
produce as output 2.

In our example we have omitted the two optional parameters. We make two further examples of integrating these parameters: 
 



 echo substr_count ($ where, $ what, 3);
In this case the output is 1 in 3 as specifying the starting character of the string $ where it is reduced (ebmaster is the portal of the Italian webmasters) and the string "webmaster" is to be found only once.

Now we integrate the fourth parameter: 
 



 echo substr_count ($ where, $ what, 3, 20);
In this case, the output will be 0 because the string was further reduced (ebmaster is the portal) and the string $ search is not found.

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