如何检查给定数字是否在数字范围内?
答案 0 :(得分:96)
您可以使用filter_var
filter_var(
$yourInteger,
FILTER_VALIDATE_INT,
array(
'options' => array(
'min_range' => $min,
'max_range' => $max
)
)
);
这也允许您specify whether you want to allow octal and hex notation of integers。请注意,该功能是类型安全的。 5.5
不是整数,而是浮点数,不会验证。
有关使用PHP过滤数据的详细教程:
答案 1 :(得分:93)
答案 2 :(得分:21)
可能有帮助:
=LEFT(A1,SEARCH(" ",A1,17)-1) & "_" & MID(A1,SEARCH(" ",A1,17),LEN(A1)-SEARCH(" ",A1,17)+1)
答案 3 :(得分:11)
你可以用一个小辅助功能来做到这一点:
/**
* Determines if $number is between $min and $max
*
* @param integer $number The number to test
* @param integer $min The minimum value in the range
* @param integer $max The maximum value in the range
* @param boolean $inclusive Whether the range should be inclusive or not
* @return boolean Whether the number was in the range
*/
function in_range($number, $min, $max, $inclusive = FALSE)
{
if (is_int($number) && is_int($min) && is_int($max))
{
return $inclusive
? ($number >= $min && $number <= $max)
: ($number > $min && $number < $max) ;
}
return FALSE;
}
你会像这样使用它:
var_dump(in_range(5, 0, 10)); // TRUE
var_dump(in_range(1, 0, 1)); // FALSE
var_dump(in_range(1, 0, 1, TRUE)); // TRUE
var_dump(in_range(11, 0, 10, TRUE)); // FALSE
// etc...
答案 4 :(得分:7)
if (($num >= $lower_boundary) && ($num <= $upper_boundary)) {
如果希望边界值无效,可能需要调整比较运算符。
答案 5 :(得分:3)
您可以尝试以下一个声明:
if (($x-$min)*($x-$max) < 0)
或:
if (max(min($x, $max), $min) == $x)
答案 6 :(得分:1)
if (in_array($value, range($min, $max), true)) {
echo "You can be sure that $min <= $value <= $max";
}
if ($value === min(max($value, $min), $max)) {
echo "You can be sure that $min <= $value <= $max";
}
实际上,这是用于将超出范围的值转换为最接近的一端。
$value = min(max($value, $min), $max);
/**
* This is un-sanitized user input.
*/
$posts_per_page = 999;
/**
* Sanitize $posts_per_page.
*/
$posts_per_page = min(max($posts_per_page, 5), 30);
/**
* Use.
*/
var_dump($posts_per_page); // Output: int(30)
答案 7 :(得分:0)
使用开关盒
switch ($num){
case ($num>= $value1 && $num<= $value2):
echo "within range 1";
break;
case ($num>= $value3 && $num<= $value4):
echo "within range 2";
break;
.
.
.
.
.
default: //default
echo "within no range";
break;
}
答案 8 :(得分:0)
使用简单的if / else范围执行此操作的另一种方法。例如:
$watermarkSize = 0;
if (($originalImageWidth >= 0) && ($originalImageWidth <= 640)) {
$watermarkSize = 10;
} else if (($originalImageWidth >= 641) && ($originalImageWidth <= 1024)) {
$watermarkSize = 25;
} else if (($originalImageWidth >= 1025) && ($originalImageWidth <= 2048)) {
$watermarkSize = 50;
} else if (($originalImageWidth >= 2049) && ($originalImageWidth <= 4096)) {
$watermarkSize = 100;
} else {
$watermarkSize = 200;
}
答案 9 :(得分:0)
我创建了一个函数来检查数组中的时间是否以某种方式重叠:
/**
* Function to check if there are overlapping times in an array of \DateTime objects.
*
* @param $ranges
*
* @return \DateTime[]|bool
*/
public function timesOverlap($ranges) {
foreach ($ranges as $k1 => $t1) {
foreach ($ranges as $k2 => $t2) {
if ($k1 != $k2) {
/* @var \DateTime[] $t1 */
/* @var \DateTime[] $t2 */
$a = $t1[0]->getTimestamp();
$b = $t1[1]->getTimestamp();
$c = $t2[0]->getTimestamp();
$d = $t2[1]->getTimestamp();
if (($c >= $a && $c <= $b) || $d >= $a && $d <= $b) {
return true;
}
}
}
}
return false;
}
答案 10 :(得分:0)
这是我的小贡献:
function inRange($number) {
$ranges = [0, 13, 17, 24, 34, 44, 54, 65, 200];
$n = count($ranges);
while($n--){
if( $number > $ranges[$n] )
return $ranges[$n]+1 .'-'. $ranges[$n + 1];
}
答案 11 :(得分:0)
非常感谢,我通过在 foreach 循环中添加 break 得到了我的答案,现在它工作正常。
这里是更新的答案:
foreach ($this->crud->getDataAll('shipping_charges') as $ship) {
if ($weight >= $ship->low && $weight <= $ship->high) {
$val = $ship->amount;
break;
}
else
{
$val = 900;
}
}
echo $val ;
答案 12 :(得分:0)
我有我的情况的功能
使用:
echo checkRangeNumber(0);
echo checkRangeNumber(1);
echo checkRangeNumber(499);
echo checkRangeNumber(500);
echo checkRangeNumber(501);
echo checkRangeNumber(3001);
echo checkRangeNumber(999);
//返回
0
1-500
1-500
1-500
501-1000
3000-3500
501-1000
function checkRangeNumber($number, $per_page = 500)
{
//$per_page = 500; // it's fixed number, but...
if ($number == 0) {
return "0";
}
$num_page = ceil($number / $per_page); // returns 65
$low_limit = ($num_page - 1) * $per_page + 1; // returns 32000
$up_limit = $num_page * $per_page; // returns 40
return "$low_limit-$up_limit";
}
答案 13 :(得分:-1)
function limit_range($num, $min, $max)
{
// Now limit it
return $num>$max?$max:$num<$min?$min:$num;
}
$min = 0; // Minimum number can be
$max = 4; // Maximum number can be
$num = 10; // Your number
// Number returned is limited to be minimum 0 and maximum 4
echo limit_range($num, $min, $max); // return 4
$num = 2;
echo limit_range($num, $min, $max); // return 2
$num = -1;
echo limit_range($num, $min, $max); // return 0
答案 14 :(得分:-1)
$ranges = [
1 => [
'min_range' => 0.01,
'max_range' => 199.99
],
2 => [
'min_range' => 200.00,
],
];
foreach( $ranges as $value => $range ){
if( filter_var( $cartTotal, FILTER_VALIDATE_FLOAT, [ 'options' => $range ] ) ){
return $value;
}
}