PHP：如何确定变量的值是否介于两个不同的常量值之间？
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PHP: How can I determine if a variable has a value that is between two distinct constant values?
提问by Gabriel Meono
How can I determine using PHP code that, for example, I have a variable that has a value
我如何确定使用 PHP 代码，例如，我有一个具有值的变量
- between 1 and 10, or
- between 20 and 40?
- 1 到 10 之间，或
- 在 20 到 40 之间？
回答by Daniel A. White
if (($value > 1 && $value < 10) || ($value > 20 && $value < 40))
回答by Ryan
Do you mean like:
你的意思是像：
$val1 = rand( 1, 10 ); // gives one integer between 1 and 10
$val2 = rand( 20, 40 ) ; // gives one integer between 20 and 40
or perhaps:
也许：
$range = range( 1, 10 ); // gives array( 1, 2, ..., 10 );
$range2 = range( 20, 40 ); // gives array( 20, 21, ..., 40 );
or maybe:
或者可能：
$truth1 = $val >= 1 && $val <= 10; // true if 1 <= x <= 10
$truth2 = $val >= 20 && $val <= 40; // true if 20 <= x <= 40
suppose you wanted:
假设你想要：
$in_range = ( $val > 1 && $val < 10 ) || ( $val > 20 && $val < 40 ); // true if 1 < x < 10 OR 20 < x < 40
回答by Heddie Franco
You can do this:
你可以这样做：
if(in_array($value, range(1, 10)) || in_array($value, range(20, 40))) {
# enter code here
}
回答by don
if (($value >= 1 && $value <= 10) || ($value >= 20 && $value <= 40)) {
// A value between 1 to 10, or 20 to 40.
}
回答by Codecraft
Guessing from the tag 'operand' you want to check a value?
从标签“操作数”中猜测您想检查一个值吗？
$myValue = 5;
$minValue = 1;
$maxValue = 10;
if ($myValue >= $minValue && $myValue <= $maxValue) {
//do something
}
回答by Aurangzeb
returns true if subject is between low and high (inclusive)
如果主题介于低和高（包括）之间，则返回 true
$between = function( $low, $high, $subject ) {
if( $subject < $low ) return false;
if( $subject > $high ) return false;
return true;
};
if( $between( 0, 100, $givenNumber )) {
// do whatever...
}
looks cleaner to me
对我来说看起来更干净
回答by Peter Berwanger
If you just want to check the value is in Range, use this:
如果您只想检查值是否在范围内，请使用以下命令：
MIN_VALUE = 1;
MAX_VALUE = 100;
$customValue = min(MAX_VALUE,max(MIN_VALUE,$customValue)));
回答by kakarot
Try This
尝试这个
if (($val >= 1 && $val <= 10) || ($val >= 20 && $val <= 40))
This will return the value between 1 to 10 & 20 to 40.
回答by ohmusama
A random value?
一个随机值？
If you want a random value, try
如果你想要一个随机值，试试
<?php
$value = mt_rand($min, $max);
mt_rand() will run a bit more random if you are using many random numbers in a row, or if you might ever execute the script more than once a second. In general, you should use mt_rand() over rand() if there is any doubt.
如果您连续使用许多随机数，或者您可能每秒多次执行脚本，则 mt_rand() 将运行得更加随机。一般来说，如果有任何疑问，您应该使用 mt_rand() 而不是 rand()。
