grapheme_strrpos

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

grapheme_strrposFind 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:

2

参见