“10000”和“10000”不一样。严格来说，“10000”甚至不是数字，因为空格不是数字。在PHP中，(int)"10 000" 退货10 所以你甚至不能可靠地强制它。WordPress的absint 做同样的事。可能有一个内置函数可以以类似于人类的方式处理这个问题，但我必须四处寻找它。

我建议在数据插入数据库时对其进行规范化，以便在试图检索信息时不必进行任何数据操作。也就是说，在插入数据之前，要弄清楚数据应该是什么样子，并确保数据符合要求。如果你的价格是数字，就像我假设的那样，检查你的数据中是否有非数字的东西，要么拒绝它（如果你是偏执狂），要么删除所有非数字的东西，然后插入它。类似于。。。

$price = preg_replace(\'/[^0-9]/\',\'\',"$price");

您可以使用MySQL\'s REPLACE 当您检索数据时，我不认为您可以使用核心函数来实现，除非您开始使用查询过滤器，但这确实是一种倒退。

准备价格WP和PHP都内置了一些东西。真正棘手的是要考虑所有可能的用户行为。您不会捕获所有内容，但您可以捕获很多内容，如无意中出现的空格、货币符号等。下面的功能有很好的注释，将向您展示我认为如何改善用户体验。我假设您的用户将使用与CMS中设置的语言相似的语言。

/**
 * Convert a number to a price, formatted according to the blogs
 * currency (which is the value returned by the WPLANG constant)
 * 
 * @param  unknown_type $price 
 * @return integer      $price
 */
function wpse73492_validate_price( $price )
{
    global $wp_locale;

    // Avoid wrong user input: The decimals can only be an integer, no float or string
    $decimals = absint( $decimals );

    // Users might add leading/trailing white space:
    $price = trim( $price );

    // Users might use a lot of funky things in the search
    // Example "shoes 10000" - they simply don\'t know better
    // But: We allow a decimal point and the thousands separator
    $regex = sprintf( 
         "0-9"
        ,$wp_locale->number_format[\'decimal_point\']
        ,$wp_locale->number_format[\'thousands_sep\']
    );
    preg_replace( "/[^{$regex}]/i", "", $string );

    // Lets convert it to a "money unit"
    // A "money unit" is something extremely different in a lot of contries.
    // Let\'s take that behavior into account
    // First we need to set the local and the charset: "en_EN.UTF-8"
    setlocale( 
         LC_MONETARY
        ,sprintf(
             \'%s.%s\'
            ,get_locale()
            ,get_bloginfo( \'charset\' )
    );
    // Second, we need to convert it to local currency
    // The WP function is a wrapper for the PHP fn `number_format()`
    // The 2nd argument defines the number of decimals, which should be 0
    // This cares about removing every part that is no absolute integer, but a float.
    $price = number_format_i18n( $price, 0 );

    // Now we need some more funkieness:
    // The DB isn\'t Babylon. Chinese and such is of our way
    // Remove the thousands separator
    $price = str_replace( $wp_locale->number_format[\'thousands_sep\'], \'\', $price );

    // Last, we help the DB, and talk to it English
    // This means that we need to get rid of ALOT: Everything non-numeric
    preg_replace( "/[^0-9]/i", "", $string );

    // Just to be sure, we then go and make it an absolute integer
    return absint( $price );
}

然后只需对所有需要的值运行该函数。

// Call it like this:
wpse73492_validate_price( $_GET[\'pr_max\'] );

// Or: If you\'re sure you got nothing than prices from $_GET
// (Hint: If you got other stuff, you can extract it up front)
$prices = array_map( \'wpse73492_validate_price\', $_GET );