only numbers

PHP CType Extensions are extensions that PHP4.2 started, and note that CType series functions have only one string type parameter that returns a Boolean value. Copy Code code as follows: $str = "0.1123"; Check whether all

As shown below: Copy Code code as follows: "^/d+$"//non-negative Integer (positive integer + 0) "^[0-9]*[1-9][0-9]*$"//Positive integer "^ ((-/d+) | (0+)) $ "//non-positive integer (negative integer + 0)

Javascript| tips//Various sizes S + + "\ r \ n page visible area wide:" + document.body.clientWidth; s + + "\ r \ n page visible Area High:" + document.body.clientHeight; s + + "\ r \ n" page visible area High: "+ Document.body.offsetWeight +"

Regular "^\d+$"//non-negative Integer (positive integer + 0)"^[0-9]*[1-9][0-9]*$"//Positive integer"^ ((-\d+) | (0+)) $ "//non-positive integer (negative integer + 0)"^-[0-9]*[1-9][0-9]*$"//Negative integer"^-?\d+$"//Integer"^\d+ (\.\d+)?

This article has sorted out all the related to the JavaScript form verification, we must read it carefully. Verify that the string is non-null var Validator = {veritylib: {isnotempty:function (input) {if (Input!= ') { return true;

/* To determine if the specified content is empty, or to eject the warning box if blank */ Function IsEmpty (thevalue, STRMSG) { if (thevalue== "") { Alert (strmsg+ "cannot be empty!"); return true; } return false; } /* Chinese judgment function,

The following verification is the length function Checktextlen (Textid) { var len = 0; var Checkfield=document.getelementbyid (Textid); var inputstring = Checkfield.value; var string_length = inputstring.length; if (string_length = 0) { return

FunctionvalidateNum (val) {// verify the integer varpatten/^ -? \ D + $/; returnpatten. test (val);} functionvalidateRealNum (val) {// verify the real number varpatten/^ -? \ D + \.? \ D * $/; returnpatten. test (val);} fu Function validateNum (val)

This document describes how to verify the input box (letters, numbers, symbols, and Chinese characters) in JavaScript. It has good reference value. Next let's take a look at it. This article mainly introduces the JS verification input box (letters,

This article describes how to use js regular expressions to control the input values of input tags: only numbers can be input, only Chinese characters can be input, and only English letters can be input. For details, see this article, hope To Help

I wrote a script that can generate random passwords. If you want to generate only numbers or only letters or upper-case passwords, you can customize them. I have written all the elements here. #! /Bin/bash # author: honway. liu # date: 2013-07-19 #

Below is the code I implemented when using VB6.0 [Vb]Private Sub txtCash_KeyPress (KeyAscii As Integer) 'limits the input amount to only numbersIf KeyAscii 57 ThenKeyAscii = 0MsgBox "only numbers can be entered !, Enter again! ", VbOKOnly +

What does input mean? What does type mean? Next, I will introduce you to the commonly used methods for limiting input. If you are interested, refer to them and hope to help you frequently use methods for limiting input. 1. When the cancel button is

JS can only be judged by numbers and decimal points. 1, the text box can only enter a numeric code (the decimal point cannot be entered) to copy code examples:"This.value=this.value.replace (/\d/g, ")"Onafterpaste="This.value=this.value.replace (/\d/

When developing a web platform, you will always encounter some input judgments or restrictions on some special characters. Recently, I have been busy developing my own web platform (www.sanyalanhua.com, a self-developed web platform, as mentioned

Using system; Using system. Text. regularexpressions; Namespace metarcommonsupport { /// /// Some special function data check is implemented through the RegEx class in the framwork class library///Public class metarnetregex{Private Static

Integer or decimal point: ^ [0-9] + \. {} [0-9] {} $Only numbers are allowed: "^ [0-9] * $ ".Only n digits can be entered: "^ \ D {n} $ ".You can only enter at least N digits: "^ \ D {n,} $ ".Only M ~ can be input ~ N-digit :. "^ \ D {m, n} $"Only

Only numbers can be entered: "^ [0-9] * $"Only n digits can be entered: "^ \ D {n} $"You can only enter at least N digits: "^ \ D {n,} $"Only M-N digits can be entered: "^ \ D {m, n} $"Only numbers starting with zero and non-zero can be entered: "^ (

In Asp.net development, in order to ensure the correctness of the data, users are often limited to input content. The verification technique provided in this article is to ensure that the textbox control only inputs numbers, the details are further

When you use detailsview to edit a value, you can get the value on the page when adding the mode. When you are in edit mode, you cannot get the value. String M_strsum = Sof. Common. gatewayfactory. getdefault (). fromcustomsql ( "