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
说明
过程化风格
grapheme_strripos(string$haystack, string $needle, int $offset = 0): int|false
Find position (in grapheme units) of last occurrence of a case-insensitive 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_strripos() will return false.
范例
示例 #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);
?>
以上例程会输出：
2
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_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
User Contributed Notes
There are no user contributed notes for this page.官方地址：https://www.php.net/manual/en/function.grapheme-strripos.php