empty value

In PHP, the $ _ SERVER variable sorts out the current url :. $ _ SERVER [HTTP_HOST]. $ _ SERVER [PHP_SELF]; $ _ SERVER variable summary $ _ SERVER [QUERY_STRING] query string. $ _ SERVER [DOCUMENT_ROOT] $ _ SERVER variable sorting in PHP currently

Here are two arrays of PHP code that are judged to be empty, because an array is a compound type of data that we cannot process like other character data, as seen in the example below. Method1. Get records with COUNT (array) null return 02. Using

This article to the students to introduce the use of Phpexcel plug-ins to quickly implement the operation of the Excel table code, there is a need to understand learning friends do not enter the reference. The first step to work is to take the data

Cookies are commonly used in some applications, I have a multi-level domain name to be able to access the primary domain binding cookie, let me give you a specific introduction in PHP using Setcookie to achieve a two-level domain name can

I. OverviewFreemarker is a template engine, a generic tool that generates text output based on a template, written in plain Java, and Freemarker is designed to generate HTML Web pages, especially applications based on MVC patterns, although

The project needs to export the data in the table, found on the Internet find phpexcel good use. Share now Phpexcel if (!defined (' BasePath ')) exit (' No Direct script access allowed '); Material Hair Material List

It's another week.-ajax (iii), week-ajax Hi I broke my promise again, but I came back with the audacity ... 1. AJAX (iii) Third, AJAX A simple example of 3.1 Introduction Completion: Query employee information, enter employee number to inquire

1 What is RedisRedis (remote DIctionary server) is an open source memory database that is commonly used as a cache or message queue.Features of Redis: Redis exists in memory, uses hard disk as persistence, and reads and writes 100,000 per

the difference between String.empty,null and ""String. Empty is equivalent to ""Typically used for initialization of stringsLike what:String A;Console.WriteLine (a);//error here, because there is no initialization of aAnd the following will not

Common people will use SqlDataReader to do the return result set, but if the business has a return parameter, the argument is empty value, and the stored procedure has the value of this parameter,If there is no problem with a DataTable, the reason

"Turn" PHP5.3 the characteristic finishing of the pro-test essence 1, introduction of __dir__ Magic constant Positioning script directory echo __dir__. "|". DirName (__file__); 2, allow the Or/and expression from 2 values to quickly get a non-

I. Types of injection attacksThere may be many different types of attack motives, but at first glance there seems to be more types. This is very real-if a malicious user discovers a way to execute multiple queries. We'll discuss this in more detail

Nested classes in the class, then nested arrays and classes, all confused. Finally, this post was edited by jerryleeee from 2013-10-2503: 26: 59 class & nbsp; editor {var & nbsp; $ Error & nbsp; var & nbsp; $ Pages; function & nbsp; vol () {nested

In the work need to deal with multi-lingual translation problems, translation is written in the Excel table. I will keep both the Chinese and English columns for the convenience of processing. This requires that the data be taken out of Excel, and

Common data types include string type, float type (float type with single precision float type, double type with double precision float type), integer type, and Boolean type 1. other data types are converted to integer type 11. Common data types

Usually the summary of some common tools, the use of simple implementation, the function of a single, no complex dependence.Managed Address: Http://git.oschina.net/caoyong2619/php-utils.git /** * Authenticator * @author

PHP tool classes, developing prerequisites for the class:Form Validation ClassVerification Code ClassLog classPagination classInfinite Pole Classification class Class Lib_form { Private $typeArr =array (' isnotempty ', '

The most important is the sort, category1. Analyze the data and get the attributes to access the databaseMinimizing access to the database (consolidating vehicle duplication into a single piece of information) gets the vehicle's license plate number

Repositoryitemcheckedit Default has three states, checked, unchecked, and semi-checked (the semi-selected state is typically used in treelist if the child node under the parent node has a selected unchecked, the parent node state is semi-checked).

MyBatis you want to insert a null value, you need to specify JdbctypeMyBatis Insert NULL returns an empty value exception, but PL/SQL does not prompt for errors, mainly because MyBatis cannot be converted There is also the MYBATIS3 error setting