grapheme_strrpos

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

grapheme_strrpos — Find position (in grapheme units) of last occurrence of a string

说明

过程化风格

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

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

参数

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.

返回值

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

示例

示例 #1 grapheme_strrpos() 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"

print grapheme_strrpos( $char_a_ring_nfd . $char_o_diaeresis_nfd . $char_o_diaeresis_nfd, $char_o_diaeresis_nfd);
?>

以上示例会输出：

参见

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

发现了问题？

了解如何改进此页面 • 提交拉取请求 • 报告一个错误

＋添加备注

用户贡献的备注

此页面尚无用户贡献的备注。

备份地址：http://www.lvesu.com/blog/php/function.grapheme-strrpos.php