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.

范例

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);
?>

以上例程会输出：

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

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官方地址：https://www.php.net/manual/en/function.grapheme-strrpos.php

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grapheme_strrpos

说明

参数

返回值

范例

参见

User Contributed Notes