2
1240<?php
$int = 12;
$min = 1;
$max = 100;
if(filter_var($int,'FILTER_VALIDATE_INT', array("options"=>array("min_range"=>$min,"max_range"=>$max))) === false){
echo ("The number is valid");
}else{
echo ("The number is not valid");
}
?>
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先 $arr = range(1,100);
foreach($arr as $k $v)
{
if($int === $v)
{
echo '在范围内';
}else{
echo '不在';
}
这样行吗？
把'FILTER_VALIDATE_INT'去掉引号就行了