Question

我有一个表单，用户可以在其中输入浮点值。我将这些值发布到php脚本，并比较用户输入的数字是否在某些值之间。如果我发布一个整数，则无论数字是否超出边界，比较都返回true。如果我输入浮点数，则无论数字是否在边界内，比较都会失败。我不是傻瓜，我在c ++中进行浮点比较，我知道如何做if（float1＆gt; = float2）返回false ...

这是我的代码：

//loading the helper
$val = Loader::helper('synerciel_form','synerciel_client');
//adding the fields to the inputs array for validation
$val->between('isolation_des_murs_peripheriques', 2.8, null, t($between.'Isolation des murs 
p&egrave;riph&egrave;riques'), true, false);

//助手类

class SynercielFormHelper extends ValidationFormHelper {
    const VALID_BETWEEN = 7;
    const VALID_FLOAT = 7;
    private $min;
    private $max;
    private $includeLow;
    private $includeHigh;

 public function between($field, $min, $max, $errorMsg, $includeLow = true, $includeHigh = true) {
        $const = SynercielFormHelper::VALID_BETWEEN;
        $this->min = $min;
        $this->max = $max;
        $this->includeLow = $includeLow;
        $this->includeHigh = $includeHigh;

        $this->addRequired($field, $errorMsg, $const);
    }
   ...
   public function test() {

    $between = new ValidationNumbersBetweenHelper();
    if (!$between->between($this->data[$field], $this->min, $this->max, $this->includeLow, $this->includeHigh)) {
                        $this->fieldsInvalid[] = $f;
}

}

我的验证方法（我相信这里很棘手）

class ValidationNumbersBetweenHelper {

    public function between($data, $min = null, $max = null, $includeLow = true, $includeHigh = true) {

        if ($min && $includeLow) {
            if (!($data >= $min))
                return false;
        } else if ($min) {
            if (!($data > $min))
                return false;
        }
        if ($max && $includeHigh) {
            if (!($data <= $max))
                return false;
        } else if ($max) {
            if (!($data < $max))
                return false;
        }
        return true;
    }

}

Answer 1

检查警告信息http://php.net/manual/en/language.operators.comparison.php

您可以使用BC数学函数http://php.net/manual/en/function.bccomp.php

$status = bccomp($left, $right);
if ($status == 0) {
    echo 'equal';
} else if ($status > 0) {
    echo 'left bigger than right';
} else {
   echo 'right bigger than left';
}

希望这有帮助

Answer 2

尝试隔离麻烦的代码。将验证功能放入独立的PHP文件中并在那里进行测试。请尝试$max检查$min和!== null 0，因为false也是!。您可以撤消逻辑并删除所有>=。（例如，将<更改为{{1}}），而不是“不大于或等于”，您可以“少于”

php将浮点数与输入字段值进行比较

2 个答案: