Grapheme函数

• grapheme_extract()
• Functiontoextractasequenceofdefaultgraphemeclustersfromatextbuffer,whichmustbeencodedinUTF-8

• grapheme_stripos()
• Findposition(ingraphemeunits)offirstoccurrenceofacase-insensitivestring

• grapheme_stristr()
• Returnspartofhaystackstringfromthefirstoccurrenceofcase-insensitiveneedletotheendofhaystack

• grapheme_strlen()
• Getstringlengthingraphemeunits

• grapheme_strpos()
• Findposition(ingraphemeunits)offirstoccurrenceofastring

• grapheme_strripos()
• Findposition(ingraphemeunits)oflastoccurrenceofacase-insensitivestring

• grapheme_strrpos()
• Findposition(ingraphemeunits)oflastoccurrenceofastring

• grapheme_strstr()
• Returnspartofhaystackstringfromthefirstoccurrenceofneedletotheendofhaystack

• grapheme_substr()
• Returnpartofastring