Null-terminated multibyte strings
TheencodingdeclarevalueisignoredinPHP5.3unlessphpiscompiledwith--enable-zend-multibyte.
findsthefirstoccurrenceofawidecharacterinawidecharacterarray(function)| |wmemset|copiesthegivenwidecharactertoeverypositioninawidecharacterarray(function)| |Multibyte
constchar*nptr,char**endptr,intbase);unsignedlonglongintstrtoull(constchar*nptr,char**endptr,intbase);//multibyte
它返回四个值: 1)value,thedecodedUnicodecodepointorbytevalue;2)multibyte,abooleanindicatingwhetherthedecodedcharacterrequiresamultibyteUTF
multibyte 需要包含多字节字符,multibyte:true。