将负数变为 0 的默认 php 函数
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Default php function that turns negative numbers in 0
提问by foo
Is there such a thing?
有这样的事情吗？
for eg
例如
$var = -5;
echo thefunction($var); // should be 0
$var = 5;
echo thefunction($var); // should be 5
回答by Alexander Gessler
Try max($var,0), which will have the desired effect. See the manual pagefor more information.
试试看max($var,0)，会有想要的效果。有关更多信息，请参阅手册页。
回答by Edgar Villegas Alvarado
Not built-in but, here you have:
不是内置的，但是，在这里你有：
function thefunction($var){
return ($var < 0 ? 0 : $var);
}
Hope this helps
希望这可以帮助
回答by loyola
In PHP, checking if a integer is negative and if it is then setting it to zero is easy, but I was looking for something shorter (and potentially faster) than:
在 PHP 中，检查一个整数是否为负数以及是否将其设置为零很容易，但我正在寻找比以下更短（并且可能更快）的东西：
if ($x < 0) $x = 0;
Well, this is a very quick check and reset, but there is a function max that does this too and it works with arrays too.
嗯，这是一个非常快速的检查和重置，但是有一个函数 max 也可以这样做，它也适用于数组。
$x = max(0, $x); // $x will be set to 0 if it was less than 0
The max() function returns the number with the highest value of two specified numbers.
max() 函数返回两个指定数字中具有最大值的数字。
echo max(1, 3, 5, 6, 7); // 7
echo max(array(2, 4, 5)); // 5
echo max(0, 'hello'); // 0
echo max('hello', 0); // hello
echo max(-1, 'hello'); // hello
// With multiple arrays, max compares from left to right
// so in our example: 2 == 2, but 4 < 5
$val = max(array(2, 4, 8), array(2, 5, 7)); // array(2, 5, 7)
// If both an array and non-array are given, the array
// is always returned as it's seen as the largest
$val = max('string', array(2, 5, 7), 42); // array(2, 5, 7)
回答by Ibu
function thefunction($number){
if ($number < 0)
return 0;
return $number;
}
that should do the trick
这应该够了吧
回答by Szél Lajos
Simply:
简单地：
echo $var < 0 ? 0 : $var;
