PHP | Find the number of sub-string occurrences
We are given two strings s1 and s2. We need to find the number of occurrences of s2 in s1.
Input : $s1 = "geeksforgeeks", $s2 = "geeks" Output : 2 Explanation : s2 appears 2 times in s1 Input : $s1 = "Hello Shubham. how are you?"; $s2 = "shubham" Output : 0 Explanation : Note the first letter of s2 is different from substrings present in s1.
The problem can be solved using PHP in built function for counting the number of occurrences of a substring in a given string.The in built function used for the given problem is:
- substr_count(): The substr_count() function counts the number of times a substring occurs in a string.
Note: The substring is case-sensitive.