Detailed explanation of PHP+sqlite database operation examples

This article mainly introduces the method of operating PHP sqlite database, and briefly analyzes the functions and related operation skills of sqlite database, including creation, opening, inserting, retrieval and error prompts, etc. Friends who need it can refer to it

The details are as follows:

SQLite is a lightweight database. Its design target is embedded, and it has been used in many embedded products. It takes up very low resources. In embedded devices, only a few hundred K of memory may be enough. It can support mainstream operating systems such as Windows/Linux/Unix, and can be combined with many programming languages, such as Tcl, PHP, Java, etc., as well as ODBC interfaces. It is also compared to MySQL and PostgreSQL, two world-famous open source software. In terms of database management systems, its processing speed is faster than them all.

PHP 5 no longer supports Mysql by default, but supports SQLite by default. This shows how influential it is, so if you want to do PHP development of SQLite, it is recommended that you use PHP 5.0.0 or above.

The following is an example of using sqlite

First, you can create an empty file of upload.db in the directory

: ". $array[make_time] ;
}
/* 错误信息代码函数 */
function error_code($code, $line_num, $debug=DEBUG)
{
 if ($code<-6 || $code>-1) {
 return false;
 }
 switch($code) {
 case -1: $errmsg = "Create database file error.";
  break;
 case -2: $errmsg = "Open sqlite database file failed.";
  break;
 case -3: $errmsg = "Create table failed, table already exist.";
  break;
 case -4: $errmsg = "Insert data failed.";
  break;
 case -5: $errmsg = "Query database data failed.";
  break;
 case -6: $errmsg = "Fetch data failed.";
  break;
 case -7: $errmsg = "";
  break;
 default: $errmsg = "Unknown error.";
 }
 $m = "[ Error ]
File: ". basename(FL) ." 
Line: ". LN ."
Mesg: ". $errmsg ."";
 if (!$debug) {
 ($m = $errmsg);
 }
 return $m;
}
?>

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