variant_cmp()
(PHP 5, PHP 7)
Compares two variants
说明
variant_cmp(mixed $left, mixed $right[,int $lcid[,int $flags]]): int
Compares$leftwith$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
$flagscan 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:
value | meaning |
---|---|
VARCMP_LT | $leftis less than$right |
VARCMP_EQ | $leftis equal to$right |
VARCMP_GT | $leftis greater than$right |
VARCMP_NULL | Either$left,$rightor both are NULL |