Course Intermediate  11331

Course Introduction："Self-study IT Network Linux Load Balancing Video Tutorial" mainly implements Linux load balancing by performing script operations on web, lvs and Linux under nagin.

Course Advanced  17634

Course Introduction："Shangxuetang MySQL Video Tutorial" introduces you to the process from installing to using the MySQL database, and introduces the specific operations of each link in detail.

Course Advanced  11347

Course Introduction："Brothers Band Front-end Example Display Video Tutorial" introduces examples of HTML5 and CSS3 technologies to everyone, so that everyone can become more proficient in using HTML5 and CSS3.

Course Introduction：PHP determines that the input does not exceed the length range of mysql's varchar field

2016-11-30 comment 0  1227

Course Introduction：In PHP, we often need to verify the length range of strings. This is where regular expressions come in handy. This article will introduce how to use PHP regular expressions to verify the length range of a specific string. Know the string to be verified To verify the length range of the string, you first need to know what the string is to be verified. For example, if we want to verify a username, we need to know what the username is. If the input is obtained from the form, you can use: $username=$_POST['userna

2023-06-24 comment 0  1869

Course Introduction：Scope of AngularJs

2016-11-01 comment 0  967

Course Introduction：The MySQLINSERT() function does not perform the insertion operation when the insertion position is not within the string length range. There are some cases, like when we pass a negative value or 0 (zero) value, or when the value is more than 2 values ​​of the total number of characters in the original string, we can say that 'pos' is not within the string length. It can be understood through the following example: The query below the example will not perform the insertion operation because 'pos' is not within the string length range, that is, it is a negative value. mysql>SelectINSERT('Tutorialspoint',-1,4,'.com');+----------

2023-08-24 comment 0  1417

Course Introduction：The range of int type in Java is -2,147,483,648 to 2,147,483,647 because int type uses 32 bits to store data, half of which is used to represent positive integers and half to represent negative integers. The int type is widely used for counting, identifiers, and storing integer values, with other integer types of varying ranges and sizes (such as byte, short, and long).

2024-04-29 comment 0  1183