variant_cmp

(PHP 5, PHP 7)

variant_cmpCompares two variants

说明

int variant_cmp ( mixed $left , mixed $right [, int $lcid [, int $flags ]] )

Compares left with right.

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

参数

left

The left operand.

right

The right operand.

lcid

A valid Locale Identifier to use when comparing strings (this affects string collation).

flags

flags can be one or more of the following values OR'd together, and affects string comparisons:

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

Note:

对于所有变量运算函数,本函数的参数可以是 PHP 内置的类型(整数,字符串,浮点数,布尔型或者 NULL),或者是一个 COM,VARIANT 或者 DOTNET 类的实例。PHP 内置类型将会使用和构造VARIANT类相同的规则转换成变量。COM 和 DOTNET 对象的值将会取其默认属性并被当成变量值使用。

变量运算函数是同名函数在 COM 库中的外包;有关此类函数的更多信息参见 MSDN 库。PHP 函数命名有少许区别,例如 PHP 中的 variant_add() 对应于 MSDN 文档中的 VarAdd()

返回值

Returns one of the following:

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

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