选择语言 :

Core_Valid::exact_length

Checks that a field is exactly the right length.

boolean Core_Valid::exact_length( string $value , integer $length )

参数列表

参数类型描述默认值

$value string Value

$length integer Exact length required

参数	类型	描述	默认值
`$value`	`string`	Value
`$length`	`integer`	Exact length required

File: ./core/classes/valid.class.php

public static function exact_length($value, $length)
{
    return UTF8::strlen($value) === $length;
}