Question

因此，如果用户键入1,000.00，则这是有效数字。如果用户输入1,0,000,00.0000,0，该怎么办？你看到这里有多个错误，你的值不能是1,0 ...或000,00，因为它必须至少是逗号后面的3个数字。为了进一步扩展它，在数字中的点后面你不能有逗号。

$ keyword = $ _POST [＆＃39; keyword＆＃39;];

if (preg_match('/0/',$keyword) ||preg_match('/1/',$keyword) ||preg_match('/2/',$keyword)||preg_match('/3/',$keyword) ||preg_match('/4/',$keyword) || preg_match('/5/',$keyword) || preg_match('/6/',$keyword) || preg_match('/7/',$keyword) ||preg_match('/8/',$keyword) ||preg_match('/9/',$keyword) ||preg_match('/-/',$keyword) ||preg_match('/+/',$keyword) || preg_match('/,/',$keyword) ) {
$keywordtest = $keyword;
if ($keyword[0] == '+' || $keyword[0] == '-')
{
    $keywordtest = substr_replace($keyword, '1', 0, 1);
    echo $keywordtest;
    }
if (preg_match('/,/',$keyword))
{
$x = 0;
while(true)
{
$findme   = ',';
$pos = strpos($keyword, $findme);
if ($pos !== false) 
    {
    $posArray[x] = $pos;
    $x = x + 1;
    if (x == 10)
    break;
    }   

}

$numberCheck = posArray[x-1];
if (is_numeric($numberCheck))
{
}
else 
{
echo "false '{$keyword}' is not numeric", PHP_EOL;
return 0;
}

$numberCheck = posArray[x+1];
if (is_numeric($numberCheck))
{
}
else 
{
echo "false '{$keyword}' is not numeric", PHP_EOL;
return 0;
}

$numberCheck = posArray[x+2];
if (is_numeric($numberCheck))
{
}
else 
{
echo "false '{$keyword}' is not numeric", PHP_EOL;
return 0;
}

$numberCheck = posArray[x+3];
if (is_numeric($numberCheck))
{
}
else 
{
echo "false '{$keyword}' is not numeric", PHP_EOL;
return 0;
}

}    



       test_numeric($keywordtest,$keyword);
       return 0;
}

else
    {

        echo "false '{$keyword}' is not numeric", PHP_EOL;

}
function test_numeric($keywordtest,$keyword)
{
    if (is_numeric($keywordtest)){

    echo "true '{$keyword}' is numeric", PHP_EOL;
    }
    return 0;
}

＆GT;

Answer 1

您需要将filter_var与FILTER_VALIDATE_FLOAT filter type和FILTER_FLAG_ALLOW_THOUSAND标志结合使用。

然后它真的很简单：

// $val == 100000
$val = filter_var('100,000.00', FILTER_VALIDATE_FLOAT, array('flags' => FILTER_FLAG_ALLOW_THOUSAND));

// $val == -100000
$val = filter_var('-100,000.00', FILTER_VALIDATE_FLOAT, array('flags' => FILTER_FLAG_ALLOW_THOUSAND));

// $val === false (invalid)
$val = filter_var('100,000.00,00', FILTER_VALIDATE_FLOAT, array('flags' => FILTER_FLAG_ALLOW_THOUSAND));

在php

1 个答案: