百科狗grapheme_strpos() - Grapheme函数
grapheme_strpos()
(PHP 5 >= 5.3.0, PHP 7, PECL intl >= 1.0.0)
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
$haystackThe string to look in. Must be valid UTF-8.
$needleThe string to look for. Must be valid UTF-8.
$offsetThe 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
grapheme_strpos()example
以上例程会输出：
2
参见
grapheme_stripos()Find position(in grapheme units)of first occurrence of a case-insensitive stringgrapheme_stristr()Returns part of haystack string from the first occurrence of case-insensitive needle to the end of haystackgrapheme_strripos()Find position(in grapheme units)of last occurrence of a case-insensitive stringgrapheme_strrpos()Find position(in grapheme units)of last occurrence of a stringgrapheme_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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