IntlChar::getNumericValue()

版本：php7

(PHP 7)

Get the numeric value for a Unicode code point

说明

publicstaticIntlChar::getNumericValue(mixed $codepoint):float

Gets the numeric value for a Unicode code point as defined in the Unicode Character Database.

For characters without any numeric values in the Unicode Character Database, this function will return IntlChar::NO_NUMERIC_VALUE.

参数

$codepoint

The integer codepoint value(e.g.0x2603forU+2603 SNOWMAN), or the character encoded as a UTF-8 string(e.g."u{2603}")

返回值

Numeric value of$codepoint, or IntlChar::NO_NUMERIC_VALUE if none is defined. This constant was added in PHP 7.0.6, prior to this version the literal value(float)-123456789may be used instead.

范例

Testing different code points

<?php
var_dump(IntlChar::getNumericValue("4"));
var_dump(IntlChar::getNumericValue("x"));
var_dump(IntlChar::getNumericValue("\u{216C}"));
?>

以上例程会输出：

float(4)
float(-123456789)
float(50)