variant_cmp

(PHP 5)

variant_cmp — Compares two variants

Description

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

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

**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:

**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()。