Verify that the user input number is in the specified range

Source: Internet
Author: User
Tags php tutorial regular expression valid

JS Verification
<script type= "Text/javascript Tutorial" >
var Dnum=document.getelementbyid ("Fenshu");
Dnum.onkeyup = function () {
This.value=this.value.replace (/d/g, "");
if (dnum.value>1000| | DNUM.VALUE<100) {

PHP Tutorial Validation
$var = 300;

$int _options = Array (
"Options" =>array
"Min_range" =>0,
"Max_range" =>256

if (!filter_var ($var, Filter_validate_int, $int _options))
Echo ("Integer is not valid");
Echo ("Integer is valid");

Method Three JS

var reg =/d{2,3}/;
var s = 888;
Alert (Reg.test (s));

PHP Regular

^ ([1-9][0-9][0-9]|1000) $

Here we use the regular expression to complete, verify that the number is between the specified data spacing.

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