Description
int
variant_cmp ( mixed left, mixed right [, int lcid [, int flags]] )
Compares left with right
and returns one of the following values:
表格 1. Variant Comparision Results
value | meaning |
---|
VARCMP_LT | left is less than
right
|
VARCMP_EQ | left is equal to
right
|
VARCMP_GT | left is greater than
right
|
VARCMP_NULL | Either 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:
表格 2. Variant Comparision Flags
value | meaning |
---|
NORM_IGNORECASE | Compare case insensitively |
NORM_IGNORENONSPACE | Ignore nonspacing characters |
NORM_IGNORESYMBOLS | Ignore symbols |
NORM_IGNOREWIDTH | Ignore string width |
NORM_IGNOREKANATYPE | Ignore Kana type |
NORM_IGNOREKASHIDA | Ignore Arabic kashida characters |
注:
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()。