grapheme_strripos

(PHP 5 >= 5.3.0, 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

int grapheme_strripos ( string $haystack , string $needle [, int $offset = 0 ] )

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

Example #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：

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