(PHP 5 >= 5.3.0, PHP 7, PHP 8, PECL intl >= 1.0.0)
grapheme_stristr — Returns part of haystack string from the first occurrence of case-insensitive needle to the end of haystack
过程化风格
$haystack, string $needle, bool $beforeNeedle = false): string|false
Returns part of haystack string starting from and including the first occurrence of case-insensitive needle to the end of haystack.
haystackThe input string. Must be valid UTF-8.
needleThe string to look for. Must be valid UTF-8.
beforeNeedle
If true, grapheme_strstr() returns the part of the
haystack before the first occurrence of the needle (excluding needle).
Returns the portion of haystack, or false if needle is not found.
示例 #1 grapheme_stristr() 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 urlencode(grapheme_stristr( $char_a_ring_nfd . $char_o_diaeresis_nfd . $char_a_ring_nfd, $char_O_diaeresis_nfd));
?>以上示例会输出：
o%CC%88a%CC%8A