只需说我想取一个数字数组:
$a['a'] = 10;
$a['b'] = 20;
$a['c'] = 500;
$a['d'] = 1000;
并迫使它们适应一个范围(例如1到100),比如
$a['a'] = 1;
$a['b'] = 2;
$a['c'] = 50;
$a['d'] = 100;
另一个例子。。。
发件人:
$a['a'] = 12;
$a['b'] = 28;
收件人:
$a['a'] = 1;
$a['b'] = 100;
最好的方法是什么?
更新:
现在我明白你真正想要什么了,你需要使用这个公式:
(new_max - new_min)(x - min)
f(x) = ---------------------------- + new_min
max - min
例如:
$a = [
'a' => 10,
'b' => 20,
'c' => 500,
'd' => 1000,
];
$min = min($a);
$max = max($a);
$new_min = 1;
$new_max = 100;
foreach ($a as $i => $v) {
$a[$i] = ((($new_max - $new_min) * ($v - $min)) / ($max - $min)) + $new_min;
}
var_dump($a);
示例:http://codepad.viper-7.com/hwGnhJ
旧答案:
您可以使用array_walk
和min
/max
:
$a = [1, 2, 1000];
array_walk($a, function(&$value) {
$value = max(min($value, 100), 1);
});
var_dump($a);
示例:http://codepad.viper-7.com/jjOCjx
或者只是一个简单的foreach
和if
:
foreach ($a as $i => $v) {
if ($v > 100) $a[$i] = 100;
elseif ($v < 1) $a[$i] = 1;
}
嗨,您可以通过以下方式完成此操作。
$a['a'] = 10;
$a['b'] = 20;
$a['c'] = 500;
$a['d'] = 1000;
$range =10; // you can define the range here which you want.
foreach($a as $k=>$v)
{
$a[$k] = $v/$range;
}
print_r($a);