mb_strrpos

Parameters

• $haystack – the text to search in.
• $needle – the text to look for.
• $offset – optional. A positive number: the search starts from this position. A negative number: the search ends that many characters before the end of the text.
• $encoding – optional, the character encoding. The default is the value of mb_internal_encoding(), usually UTF-8.

Examples

// the position in characters, strrpos returns the position in bytes
echo mb_strrpos("café and café", "café"); // 9
echo strrpos("café and café", "café"); // 10
var_dump(mb_strrpos("café", "x")); // bool(false)
// the part after the last separator
$path = "Home > Recipes > Crème brûlée";
echo mb_substr($path, mb_strrpos($path, ">") + 2); // Crème brûlée
// shortening text to a whole word: cut it and go back to the last space
$text = "Crème brûlée and café au lait";
$short = mb_substr($text, 0, 18);
echo $short; // Crème brûlée and c
echo mb_substr($short, 0, mb_strrpos($short, " ")) . "…"; // Crème brûlée and…
// a positive offset: the search starts from the fifth position
echo mb_strrpos("a-b-c-d", "-", 4); // 5
// a negative offset: the last three characters are left out
echo mb_strrpos("a-b-c-d", "-", -3); // 3

Things to watch out for

• Compare the result with !== false. Position 0 behaves as false in an ordinary condition.
• The position is in characters. Use it only with mb_ functions, and a position from strrpos() only with functions without mb_.
• When shortening to a whole word, expect text without a space. mb_strrpos then returns false and mb_substr() with the length false (that is 0) returns an empty string.
• It is case-sensitive. mb_strripos() searches regardless of case.
• pathinfo() returns a file extension more reliably.

Related functions:
strrpos()
mb_strpos()
mb_substr()