The strrpos Function
The strrpos function returns the position
of the last occurrence of a substring.
The result of the function will be the position of the first character of the found substring, and if such a substring is not found - ⁅с⁆false⁅/с⁆.
The start of the search can be adjusted with a third optional parameter - if specified, the search will start not from the beginning of the string, but from the specified location.
Syntax
strrpos(string $haystack, string $needle, int $offset = 0): int|false
Example
In this example, the function will return the position of the last
occurrence of the character 'a':
<?php
echo strrpos('abcde abcde', 'a');
?>
Code execution result:
6
Example
Search for the last occurrence of a multi-character substring:
<?php
echo strrpos('hello world, hello php', 'hello');
?>
Code execution result:
13
Example
Search with a specified start position:
<?php
echo strrpos('abcabcabc', 'a', 5);
?>
Code execution result (search starts from position 5):
6
Example
If the substring is not found, the function returns false:
<?php
var_dump(strrpos('abcdef', 'z'));
?>
Code execution result:
false
Example 5: Case-Sensitive Search
The function is case-sensitive:
<?php
var_dump(strrpos('Hello World', 'h'));
?>
Code execution result:
false
See Also
-
the
strriposfunction,
which performs a similar operation case-insensitively -
the
strposfunction,
which returns the position of the first occurrence of a substring -
the
str_containsfunction,
which checks for the occurrence of a character in a string -
the
str_starts_withfunction,
which checks the beginning of a string -
the
str_ends_withfunction,
which checks the end of a string
