grapheme_strpos

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

grapheme_strpos — Find position (in grapheme units) of first occurrence of a string

说明

过程化风格

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

Find position (in grapheme units) of first 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). 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_strpos() will return boolean FALSE.

更新日志

版本 说明
7.1.0 Support for negative offsets has been added.

范例

Example #1 grapheme_strpos() 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_strpos( $char_a_ring_nfd . $char_a_ring_nfd . $char_o_diaeresis_nfd, $char_o_diaeresis_nfd);

?>

以上例程会输出：

2

参见

相关文章
php grapheme 函数 find position in grapheme units of first occurrence of a case insensitive stringphp grapheme 函数 returns part of haystack string from the first occurrence of case insensitive needle to the end of haystackphp grapheme 函数 get string length in grapheme unitsphp grapheme 函数 find position in grapheme units of first occurrence of a stringphp grapheme 函数 find position in grapheme units of last occurrence of a case insensitive stringphp grapheme 函数 find position in grapheme units of last occurrence of a stringphp grapheme 函数 returns part of haystack string from the first occurrence of needle to the end of haystackphp grapheme 函数 return part of a stringphp iconv 函数 finds position of first occurrence of a needle within a haystackphp 多字节字符串 函数 returns position and length of a matched part of the multibyte regular expression for a predefined multibyte stringphp ncurses 函数 add attributed string with specified length at current positionphp ncurses 函数 add attributed string at current positionphp ncurses 函数 add string with specified length at current positionphp ncurses 函数 insert string at current position moving rest of line rightphp ncurses 函数 move position and add attributed string with specified lengthphp ncurses 函数 move position and add attributed stringphp ncurses 函数 move position and add string with specified lengthphp ncurses 函数 move position and add stringphp ncurses 函数 add string at new position in windowphp sqlite 函数 fetches the first column of a result set as a string
关注编程学问公众号