10 recommended articles about data functions

1. When developing a database connection pool, you often need to perform some operations on the database, such as common additions, deletions, modifications, and searches. When the amount of data is small, you can perform operations directly, but when the amount of data increases, , each connection and release of the database will take a certain amount of time. At this time, the database connection pool can be used to maintain the database link, reduce the cost of connecting to the database on the program, and reduce the pressure on the database, then the database connection pool is a What kind of thing? As the name suggests, it is a pond. What is placed in the pond is a link to the database. For example, a fish pond is a pond for raising fish. If you want to eat fish, you can directly fish it. You don’t have to buy fry and raise fish yourself. The database The connection pool is used to store links to the database. All links are established uniformly. When used, you can directly take them from it. After use, you can put them back into the pool. Since you use this thing, then We don’t need to write the code ourselves. Some open source ones can be used directly. There are three common open source connection pools, c3p0, dbcp, and proxool. I have never used c3p0 and proxool, just simple Used

1. Summary of data function definition and usage

##Introduction: 1. When developing a database connection pool, you often need to perform some operations on the database, such as common additions, deletions, modifications, and searches. When the amount of data is small, you can perform operations directly, but when the amount of data increases, At this time, each connection and release of the database will take a certain amount of time. At this time, the database connection pool can be used to maintain the database link, reduce the overhead of connecting to the database on the program, and reduce the pressure on the database, then the database connection pool What kind of thing is it? As the name suggests, it is a pool, and the pool contains links to the database, like a fish pond...

2. Detailed introduction to PHP lazy functions

Introduction: Copy the code The code is as follows: /* *@Automatically add data Function *@$table Table name *@$arr Field library array("title",array("content",int)) *@ array(field, type)  *@ Type explanation

3. php uses curl function to obtain https web page and post data example

Introduction: function vpost($url,$data){ // Simulate submission data function $curl = curl_init(); // Start a CURL session

4. PHP Curl can simulate POST https

Introduction: PHP simulates POST, which is commonly used by itself. There is no function vpost($ url,$data,$cookie){ // Simulate the data submission function $curl = curl_init(); // Start a CURL session curl_setopt($curl, CURLOPT_URL, $url); // The address to be accessed curl_setopt($curl, CURLOPT_SSL_VERIFYPEER, 0); // For authentication

5. PHP simulates POST

Introduction: functionvpost($url ,$data,$cookie){//Simulate the submit data function $curl=curl_init();//Start a CURL session curl_setopt($curl,CURLOPT_URL,$url);//The address to be accessed curl_setopt($curl,CURLOPT_SSL_VERIFYPEER ,0);//Check the source of the authentication certificate curl_setopt($curl,CURLOPT_SSL_VE

6. php lazy function automatically adds data_PHP tutorial

Introduction: PHP lazy function automatically adds data. Copy the code as follows: /* *@Automatically add data function*@$table table name*@$arr field library array("title",array("content",int)) *@ array(field, type) *@ Type description html--allow ht

7. php Common Data Functions_PHP Tutorial

Introduction: PHP commonly used data functions. PHP function description ABS device ( ) Returns the 3rd No. acos of the absolute value ( ) Returns the 3rd No. acosh of the arccosine ( ) Returns the 4th No. acosh of the inverse hyperbolic cosine ( ) Returns the 3rd No. acsine of the arcsine

8. How to correctly understand PHP to get and display database data functions_PHP tutorial

Introduction: How to correctly understand PHP to get and display database data function. When using PHP to obtain the display database data function, mysql_result() mixed mysql_result(resource result_set, int row [, mixed field]) obtains the number of a field from the specified row of result_set

9 . The solution to the problem that the fgetcsv function cannot read the Chinese string in the csv file_PHP tutorial

Introduction: The solution to the problem that the fgetcsv function cannot read the Chinese string in the csv file . Read data function: getData( = (( = ( ,"r")) !== (( = ( )) !== = ( = [] = mb_convert_encoding( ,"UTF-8","gbk"); [] = It is found that the read Chinese string is empty.... Solution: Add, delete, modify and check operations in fg

10. CI (CodeIgniter) framework_ PHP tutorial

##Introduction: Add, delete, modify and query operations in the CI (CodeIgniter) framework. CodeIgniter’s data function class is in systemdatabaseDB_active_rec.php. Copy the code as follows: span style="fontfont -size:16px;"class ModelName extends CI_Model { function __construct()

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