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'B *'.(3) {n, m} m and n are non-negative integers, where n 2. Application of regular expressions in phpRegular expressions are widely used in web systems. As long as you understand how to write regular expressions, you can use them in different ways. For example: checks the data format, replaces the relevant text, and extracts the text content of interest.Verify the validity of the E-mail address in the stringThe most basic email address format can be viewed as ^: Match starts([A-z0-9A

Match Chinese: [\u4e00-\u9fa5] English letter: [A-za-z] Number: [0-9] Match Chinese, English letters and numbers and _: ^[\u4e00-\u9fa5_a-za-z0-9]+$ At the same time determine the input length: [\u4e00-\u9fa5_a-za-z0-9_] {4,10} ^[\w\u4e00-\u9fa5\uf900-\ufa2d]*$ 1, a regular expression, contains only Chinese characters, numbers, letters, underscores can no

specific position in a string: "[AB]": Indicates that a string has a "a" or "B" (equivalent to "a¦b"); [A-d]: Indicates that a string contains one of the lowercase ' a ' to ' d ' (equivalent to "a¦b¦c¦d" or "[ABCD]"); "^[a-za-z]": Represents a string that begins with a letter; "[0-9]%": Indicates a digit before a percent semicolon; ", [a-za-z0-9]$": Indicates that a string ends with a comma followed b

Contact the Kinect for Xboxone, very excited, follow the online tutorials to start configuring and want to use development as soon as possible. The first step, install the SDK, success, the second step, insert the data cable ... The thing is stuck here, insert the data cable, power up, the system should automatically load driver, but in the Device Manager, there is no discovery. My Build Environment information: Windows Ten OS Lenovo E440 CORE i5 processor, frequency 2.5ghz,4g ram,usb3.0 (S

Starting October 7, the Windows 8/8.1 China Store (which needs to be updated to the latest edition) has started to support the use of Alipay to purchase applications. At the same time, the Windows gift Card recharge channel, which was not available in the store, was previously open and could be paid with the Microsoft account balance, ready for the upcoming Windows gift card and the official release of Windows 8.1. The move means that Microsoft is starting to unify the way it pays for its platf

Browse Online Code: http://msdn.microsoft.com/zh-cn/magazine/cc164480.aspx This article discusses: Game Development Basics Spacewar Starter Kit Add features for Spacewar Customizing game Graphics This article uses the following techniques: XNA Game Studio Express, Xbox 360 and C # Directory Game Development Basics Spacewar Starter Kit Understanding Game Loops Defense! Rendering details Fire The Shields! Bonus points: Change space! Laun

development of the CPU + GPU hybrid design, to prepare for the future restoration of software raster, at the same time, it can be used to support rendering of WPF on low-end graphics cards in a short period of time. In addition, dx11 also adds direct2d for planar plotting and TrueType text painting components. [MDX] updateCurrently, the main DX hosting APIs on Windows can access almost all functions of DX9. However, in August, The dxsdk is the last official version that supports MDX. Later vers

"Real Start Menu" Windows 8.1 Update's "Fake" Start menu can only be returned to the Metro main screen, a change that is clearly not satisfying for traditional users. And through the current leaked Windows 9 information, Microsoft is not willing to simply bring back the traditional Start menu, but designed an integrated traditional desktop and Metro application of the huge Start menu, but obviously, this has been able to meet the needs of traditional users "Better integration of th

(); } public static void Main (string[] args) throws IOException { System.out.println ("") ; } Verify mailbox: public static Boolean Isemail (String stremail) { string strpattern = ' ^[a-za-z][\\w\\.-]*[a-za-z0-9]@[a-za-z0-9][\ \w\\.-]*[a-za-z0-9]\\. [A-

Shell-Used regular expressions "^\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+)? $"//nonnegative floating-point number (positive float + 0)"^ ([0-9]+\. [0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*\. [0-9]+) | ([0-9]*[1-9][0-9]*)] $ "//Positive floating-point number"^ ((-\d+ (\.\d+)?) | (0+ (\.0+)) $ "//non-positive floati

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) "^-[0-9]*[1-9][0-9]*$"//Negative integer "^-?/d+$"//Integer "^/d+ (/./d+)? $"//nonnegative floating-point number (positive float + 0) "^ ([0-9]+/. [0-9]*[1-9][0-9]*) | ([0-9]*[1-9][0-9]*/. [0-9]+) | ([0-9]*[1-9][0-9]*)] $ "//Positive floating-point number "^ ((-/d+ (/./d+)?) |

-9]*$12 Non-zero Integer: ^\-[1-9][]0-9 "*$ or ^-[1-9]\d*$13 non-negative integers: ^\d+$ or ^[1-9]\d*|0$14 Non-positive integers: ^-[1-9]\d*|0$ or ^ (-\d+) | ( 0+)) $15 non-negative floating-point number: ^\d+ (\.\d+)? $ or ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*|0?\.0+|0$16 Non-positive floating-point number: ^ (-\d+ (\.\d+)?) | (0+ (\.0+)) $ or ^ (-([1-9]\d*\.\d*|0\.\d*[1-9]\d*)) |0?\.0+|0$17 Positive floating-point numbers: ^[1-9]\d*\.\d*|0\.\d*[1-9]\d*$ or ^ ([0-9]+\.[ 0-9]*[1-9][0-9]*) | ([0-9]*[1-9

)){If (! Isset ($ validate_err_msg [$ kk] [$ k])Return 'Var '. $ key. 'in'. $ k.' of regular validation failure! ';Return $ validate_err_msg [$ kk] [$ k];}}}}}}Return true;} // Obtain the rule arrayPublic function get_role_name (){Return $ this-> role_name;} // Set property rulesPublic function set_role_name ($ arr ){$ This-> role_name = array_merge ($ this-> role_name, $ arr );} // Verify whether it is nullPublic function required ($ str ){If (trim ($ str )! = "") Return true;Return false;} //

}\)?)? [\ S-]? \ D {7, 8} [\ s-]? \ D {} is compatible with fixed-line and mobile phones. It supports area code, "-", and extension Chinese name [\ u3000-\ u9fa5 \ x20] {2, 4}; Length: 2-4, any character string ^. {} any character ranging from 1 to 16 can only contain numbers: "^ [0-9] * $ ". Only n digits can be entered: "^ \ D $ ". You can only enter at least N digits: "^ \ D {n,} $ ". Only M ~ can be input ~ N-digit :. "^ \ D {M, N }$" only numbers starting with zero and non-zero can be ente

($str)! = "") return true;return false;} Verify message FormatPublic Function Email ($str) {if (Preg_match ("/^" ([a-za-z0-9]+[_|\_|\.]?) *[a-za-z0-9]+@ ([a-za-z0-9]+[_|\_|\.]?) *[a-za-z0-9]+\. [A-za-z] {2,3}$/", $str)) return true;else return false;} Verify IDPublic Functi