Sequencee can perform auto-increment and auto-increment operations on one or more fields of a single instance, or perform batch auto-increment and auto-increment operations on data that meet the conditions. The auto-increment and auto-increment of a
& Lt; spanstyle = & quot; color: rgb (54,46, 43); font-family: Simsun; font-size: 16px; line-height: 24px; text-indent: 2em; & quot; & gt; when we were studying the first language, for example, the C language programming in a university course,
The mysteries of the auto-increment and auto-increment operations in PHP. First, let's take a look at the questions about the auto increment and auto increment operations in PHP: $ a1; $ B $ a; if ($ B $ a ++) echotrue; elseechofalse; first, creates
"PHP" MySQL gets the primary key for inserting data (self-increment id), MySQL primary key
To prevent primary key collisions, the self-increment (auto_increment) field is often used when designing db. So before inserting the data, we often don't
PHP auto-incrementing write the output result of the php segment:
The answer is: 501.
It involves two knowledge points:
1. php variable scope;
2. Auto-increment/auto-increment variables;
The interviewer understands the scope of "php
The mysteries of auto-increment and auto-increment operations in PHP
First, let's take a look at the interview question:
$ A = 1; $ B = & $ a; if ($ B = $ a ++) echo "true"; else echo "false ";
First, create a variable $ a and set the value to 1
Write the output result of the php segment:
The answer is: 501.
It involves two knowledge points:
1. php variable scope;
2. Auto-increment/auto-increment variables;
The interviewer understands the scope of "php variables" well, but he is not sure
This time for everyone to bring PHP Boolean self-increment and self-reduction use of the detailed, PHP Boolean self-increment and self-reduction of the use of attention to what, the following is the actual case, take a look.
He found that the
I saw an interview question today, which involves a very elementary question, as shown below:
Write the output result of the php segment:
Code highlighting produced by Actipro CodeHighlighter (freeware)http://www.CodeHighlighter.com/-->
$ Count = 5
How does PHP implement MongoDB custom build self-increment ID? This paper mainly introduces the method of generating self-increment ID in the way of realizing MongoDB custom in PHP, and the implementation and corresponding PHP method of MongoDB self-
The content source of this page is from Internet, which doesn't represent Alibaba Cloud's opinion;
products and services mentioned on that page don't have any relationship with Alibaba Cloud. If the
content of the page makes you feel confusing, please write us an email, we will handle the problem
within 5 days after receiving your email.
If you find any instances of plagiarism from the community, please send an email to:
info-contact@alibabacloud.com
and provide relevant evidence. A staff member will contact you within 5 working days.