PHP

& Amp; nbsp; due to the checkbox attribute, all the names of the checkbox option must be set to one. if checkbox [] is used, php can read the content, in the form of data. Otherwise, the checkbo cannot be read correctly. Because of the checkbox

Supports various encoding/** & amp; nbsp; * string $ source string to be converted & amp; nbsp; * string $ start position & amp; nbsp; * string $ length cut Supports various encodings /** * String $ source string to be converted * String $ start

1. mysql_connect ()-establish database connection 2. mysql_pconnect ()-establish database permanent connection 3. mysql_close ()-close Database Connection 4. mysql_select_db ( 1. mysql_connect ()-create a database connection 2. mysql_pconnect

Try to use single quotes instead of double quotes! 1. if the class method can be defined as static, it should be defined as static as much as possible, and its speed will be increased by nearly four times. 2. $ row ['id'] is 7 times faster than $

& Amp; nbsp; associated arrays generally do not support grouping statistics. you can use the array_values () function to group statistics on array elements! & Amp; lt ;? Php $ arr = array ('a' = & amp; gt; 'Java ',' The associated array generally

& Amp; nbsp; PHP is very simple to implement HTTP forced authentication. it can be implemented with just a few lines of code, let's take a look at an example. I will introduce PHP to implement HTTP authentication in detail based on the example here.

Php array operations common functions & amp; nbsp; 1. unset () remove a function from the array, such as: & amp; lt ;? Php $ arr = array ('baidu' = & amp; gt; 'http: // ww Php array operations common functions   1. unset () removes a function from

It indicates that it is very easy to back up the database and table in the ci framework. you can instantly back up the database and table and compress it into Zip or Gzip format. Php point-to-point provides you with simple backup code:

We know that php does not support multi-inheritance, that is, classAextendsB and C {}. what should we do if we want to implement multi-inheritance? This is implemented using an Interface, which can be inherited from other interfaces and allowed We

For how php files are uploaded, see the following script: & amp; lt ;? Php $ uploadDir = $ _ SERVER ['document _ root']. & quot; zend/exercise/& quot;. $ _ FILES [' How php files are uploaded First, read the following script: "; Echo" MIME type

When using the CI framework, you often encounter jump and Path Problems. site_url () and base_url () are easy to confuse. the differences between them are described below! Assume that the base_url and index_page in your config file are When using

The GD2 Extension Library in php is an excellent image processing library that allows you to create images of various formats. it has powerful functions! Open GD2: Find the php configuration file php. ini and search extension = php_gd2.dll. remove &

This is a php interview question for a real IT company recruiting php programmers. all the questions are about algorithms. To be honest, these are simple basic algorithms! The following php interview questions are all provided with answers. please

1. substr (source string, in fact location [, length])-truncate the string and return some strings & amp; lt ;? Php $ str = & quot; phpddt.com & quot; echosubstr ($ str, 2); // pddt. 1. substr (source string, actual position [, length])-truncate the

Php can split the string into an array, and concatenate the array into a string. & amp; nbsp; implode () connection function: & amp; nbsp; this function concatenates an array element into a string. we need to give it two parameters before connection.

For a good website, we must have 404 page design, website map, and contact information ..., this is an important part of seo optimization. for the importance of 404 pages, I believe I don't need to talk about it. Below are some of the better 404

1. use the header () function to jump to the header () function. The Location header is usually used to redirect pages. See the following php code: & amp; lt ;? Phpheader (& quot; Location: http: // ww 1. jump using the header () function In the

First, you want to understand the concept of the database abstraction layer. at this time, you will know the role of ADODB. Although php supports most databases, there is a big difference between each database, so when you change the database, you

& Amp; nbsp; Note: This is a relatively basic php interview question. The answer is provided by me. please refer to it on your own! More php interview questions will be provided later in the php Tutorial! I. blank question 1. what language is PHP

Dedecms is indeed a lot of dream-weaving templates, but it is not that simple for new users to install Dedecms templates, if you understand html and css, and are familiar with the commonly used labels of Zhimeng, it will be of great help to you.