vtech letters and numbers

Ask God to help write a regular expression that consists of only numbers, letters, Chinese, underscores,/, spaces. Urgent and urgent Thighs to help me this rookie of the busy!! Thank you ------Solution-------------------- /^[\w \\]+$/u Non-utf-8 need to be utf-8 before use ------Solution-------------------- ^[\u4e00-\u9fa5_a-za-z0-9\s\\]+$ ------Solution-------------------- $aa = ' I/1a_ '; Var_du

PHP Regular expressions that allow numbers, letters, and punctuation

Regular validation issues, 6-16-bit letters or numbers

1. Determine if the string is only a numeric:1> with Java-brought function publicstaticbooleanisnumeric (stringstr) {for (Inti=str.length ();--i>=0;) {if (! Character.isdigit (Str.charat (i))) {returnfalse;}} returntrue;}2> Regular Expression publicstaticbooleanisnumeric (STRINGNBSP;STR) {patternpattern=pattern.compile ("[0-9]*"); Returnpattern.matcher (str). Matches ();}3> with ASCII code publicstatic Booleanisnumeric (STRINGNBSP;STR) {for (Inti=str.length ();--i>=0;) { intchr=str.charat (i);

　　/*** Algorithmutil.java * com.tfedu.yuwen.util * Copyright (c) 2017, Beijing Poly-Wisdom Future Technology Co., Ltd. All rights reserved.*/ PackageCom.tfedu.yuwen.util;ImportJava.util.Random;/*** Algorithm Tool class * @authorKuangxiang ([email protected]) * @Date September 18, 2017*/ Public classAlgorithmutil {/*** Number of digits * */ Private Static Final intDIGIT = 8; /*** Verify number of code digits*/ Private Static Final intVerifycodedigit = 6; /*** * Generate ring ID * @returnstr