grapheme_strripos()

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

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

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 boolean FALSE.

范例

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：

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