variant_cmp

Compares two variants (PHP 5)
int variant_cmp ( mixed left, mixed right [, int lcid [, int flags]] )

Compares left with right and returns one of the following values:

表 27. Variant Comparision Results

valuemeaning
VARCMP_LTleft is less than right
VARCMP_EQleft is equal to right
VARCMP_GTleft is greater than right
VARCMP_NULLEither left, right or both are NULL

This function will only compare scalar values, not arrays or variant records.

lcid is a valid Locale Identifier to use when comparing strings (this affects string collation). flags can be one or more of the following values OR'd together, and affects string comparisons:

表 28. Variant Comparision Flags

valuemeaning
NORM_IGNORECASECompare case insensitively
NORM_IGNORENONSPACEIgnore nonspacing characters
NORM_IGNORESYMBOLSIgnore symbols
NORM_IGNOREWIDTHIgnore string width
NORM_IGNOREKANATYPEIgnore Kana type
NORM_IGNOREKASHIDAIgnore Arabic kashida characters
注意:

对于所有的变量算法函数,此函数的参数可以要么是 PHP 自身的类型(整型,字符串,浮点型,布尔型或者 NULL),要么是一个 COM,VARIANT 或 DOTNET 类的实例。PHP 自身类型将被转换为变量,使用与 VARIANT 类的构造函数中相同的规则。COM 和 DOTNET 对象将具有其默认属性的值,取得并作为变量值使用。

变量算法函数是 COM 库中与其名称接近的函数的封装。此类函数的更多信息请参考 MSDN 库。PHP 函数命名有少许不同,例如 PHP 中的 variant_add() 对应于 MSDN 文档中的 VarAdd()。