[int$offset = 0],
[int|null$length = null]
substr_count returns the number of times the needle substring occurs in the haystack string. Please note that needle is case sensitive.
This function doesn't count overlapped substrings. See the example below!
The string to search in
The substring to search for
The offset where to start counting. If the offset is negative, counting starts from the end of the string.
The maximum length after the specified offset to search for the substring. It outputs a warning if the offset plus the length is greater than the haystack length. A negative length counts from the end of haystack.
This function returns an int.
|8.0.0||length is nullable now.|
|7.1.0||Support for negative offsets and lengths has been added. length may also be 0 now.|