grapheme_stripos

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

grapheme_stripos — Find position (in grapheme units) of first occurrence of a case-insensitive string

说明

过程化风格

grapheme_stripos(string $haystack, string $needle, int $offset = 0): int|false

Find position (in grapheme units) of first 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). If the offset is negative, it is treated relative to the end of the string. 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_stripos() will return false.

更新日志

版本	说明
7.1.0	Support for negative `offset`s has been added.

范例

示例 #1 grapheme_stripos() 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_stripos( $char_a_ring_nfd . $char_a_ring_nfd . $char_o_diaeresis_nfd, $char_O_diaeresis_nfd);

?>

以上例程会输出：

参见

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_strripos() - Find position (in grapheme units) of last occurrence of a case-insensitive 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

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User Contributed Notes 1 note

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Anonymous ¶

3 years ago


As expected, grapheme_stripos() does return boolean FALSE if the needle is not found in the haystack.
Use strict type comparison to check for that condition, like:

if (FALSE === grapheme_stripos('a', 'b')) {print 'Needle not found';}

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官方地址：https://www.php.net/manual/en/function.grapheme-stripos.php

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grapheme_stripos

说明

参数

返回值

更新日志

范例

参见

User Contributed Notes 1 note