Find position (in grapheme units) of last occurrence of a case-insensitive string

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- PHP Manual
- Grapheme Functions
- Find position (in grapheme units) of last occurrence of a case-insensitive string

# grapheme_strripos

(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)

grapheme_strripos — Find position (in grapheme units) of last occurrence of a case-insensitive string

### Description

Procedural style

grapheme_strripos(string `$haystack`, string `$needle`, int `$offset` = 0): int|false

Find position (in grapheme units) of last occurrence of a case-insensitive string

### Parameters

`haystack`

  The string to look in. Must be valid UTF-8.

`needle`

  The string to look for. Must be valid UTF-8.

`offset`

  The optional `offset` parameter allows you to specify where in `haystack` to start searching as an offset in grapheme units (not bytes or characters). The position returned is still relative to the beginning of `haystack` regardless of the value of `offset`.

### Return Values

Returns the position as an integer. If `needle` is not found, grapheme_strripos() will return `false`.

### Examples

Example #1 grapheme_strripos() example

    <?php

    $char_a_ring_nfd = "a\xCC\x8A";  // 'LATIN SMALL LETTER A WITH RING ABOVE' (U+00E5) normalization form "D"
    $char_o_diaeresis_nfd = "o\xCC\x88"; // 'LATIN SMALL LETTER O WITH DIAERESIS' (U+00F6) normalization form "D"
    $char_O_diaeresis_nfd = "O\xCC\x88"; // 'LATIN CAPITAL LETTER O WITH DIAERESIS' (U+00D6) normalization form "D"

    print grapheme_strripos( $char_a_ring_nfd . $char_o_diaeresis_nfd . $char_o_diaeresis_nfd, $char_O_diaeresis_nfd);

    ?>

The above example will output:

    2

### See Also

- grapheme_stripos() - Find position (in grapheme units) of first occurrence of a case-insensitive string
- grapheme_stristr() - Returns part of haystack string from the first occurrence of case-insensitive needle to the end of haystack
- grapheme_strpos() - Find position (in grapheme units) of first occurrence of a string
- grapheme_strrpos() - Find position (in grapheme units) of last occurrence of a string
- grapheme_strstr() - Returns part of haystack string from the first occurrence of needle to the end of haystack
- » Unicode Text Segmentation: Grapheme Cluster Boundaries