选择语言 :

Core_Valid::decimal

Checks if a string is a proper decimal format. Optionally, a specific number of digits can be checked too.

boolean Core_Valid::decimal( string $str [, integer $places = integer 2 , integer $digits = null ] )

参数列表

参数类型描述默认值

$str string Number to check

$places integer Number of decimal places integer 2

$digits integer Number of digits null

参数	类型	描述	默认值
`$str`	`string`	Number to check
`$places`	`integer`	Number of decimal places	integer 2
`$digits`	`integer`	Number of digits	null

返回值

boolean

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

public static function decimal($str, $places = 2, $digits = NULL)
{
    if ($digits > 0)
    {
        // Specific number of digits
        $digits = '{' . ((int)$digits) . '}';
    }
    else
    {
        // Any number of digits
        $digits = '+';
    }

    // Get the decimal point for the current locale
    list ( $decimal ) = array_values(localeconv());

    return (bool)preg_match('/^[0-9]' . $digits . preg_quote($decimal) . '[0-9]{' . ((int)$places) . '}$/D', $str);
}