[PHP 4, PHP 5, PHP 7, PHP 8]
substr_count — Count the number of substring occurrences
Description
substr_count[
string $haystack
,
string $needle
,
int
$offset
= 0,
?int $length
= null
]: int
Note:
This function doesn't count overlapped substrings. See the example below!
Parameters
haystack
The string to search in
needle
The substring to search for
offset
The offset where to start counting. If the offset is negative, counting starts from the end of the string.
length
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
.
Return Values
This function returns an int.
Changelog
8.0.0 | length is nullable now.
|
7.1.0 | Support for negative offset s and length s has been added. length may also be 0 now.
|
Examples
Example #1 A substr_count[] example