PHP implementation of exporting MySQL database as .sql file instance (imitation of PHPMyadmin export function)

PHP implementation of exporting MySQL database as .sql file instance (imitation of PHPMyadmin export function)_PHP tutorial

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Release： 2016-07-13 10:30:02

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Using PHP code to implement database backup can make website management very convenient. We can directly enter the background operation to complete the database backup.

Key technologies:

1. First, you need to get the tables in the database using the function mysql_list_tables(), and then you can save all the obtained table names into an array.
2. show create table table name can get the table structure.
3. select * from table name, take out all the records, and use a loop to splice them into insert into... statements.

Implementation code:

Copy code The code is as follows:

header("Content-type:text/html;charset=utf-8");

//Configuration information
$cfg_dbhost = 'localhost';
$cfg_dbname = ' ftdm';
$cfg_dbuser = 'root';
$cfg_dbpwd = 'root';
$cfg_db_language = 'utf8';
$to_file_name = "ftdm.sql";
// END configuration

//Link database
$link = mysql_connect($cfg_dbhost,$cfg_dbuser,$cfg_dbpwd);
mysql_select_db($cfg_dbname);
//Select encoding
mysql_query("set names " .$cfg_db_language);
//What tables are there in the database
$tables = mysql_list_tables($cfg_dbname);
//Record these tables into an array
$tabList = array();
while($row = mysql_fetch_row($tables)){
$tabList[] = $row[0];
}

echo "Running, please wait patiently...< ;br/>";
$info = "--------------------------------rn";
$info .= "-- Date:".date("Y-m-d H:i:s",time())."rn";
$info .= "-- This program is only for testing and learning. Not suitable for processing extremely large amounts of datarn";
$info .= "-----------------------------------rnrn";
file_put_contents($to_file_name,$info,FILE_APPEND);

//Export the table structure of each table to a file
foreach($tabList as $val){
$sql = "show create table ".$val;
$res = mysql_query( $sql,$link);
$row = mysql_fetch_array($res);
$info = "------------------------ ------rn";
$info .= "-- Table structure for `".$val."`rn";
$info .= "-- ------- ---------------------rn";
$info .= "DROP TABLE IF EXISTS `".$val."`;rn";
$sqlStr = $info.$row[1].";rnrn";
//Append to file
file_put_contents($to_file_name,$sqlStr,FILE_APPEND);
//Release resources
mysql_free_result($res);
}

//Export the data of each table to a file
foreach($tabList as $val){
$sql = "select * from ".$val;
$res = mysql_query($ sql,$link);
//If there is no data in the table, continue to the next table
if(mysql_num_rows($res)<1) continue;
//
$info = "-- ----------------------------rn";
$info .= "-- Records for `".$ val."`rn";
$info .= "--------------------------------rn";
file_put_contents($to_file_name,$info,FILE_APPEND);
//Read data
while($row = mysql_fetch_row($res)){
$sqlStr = "INSERT INTO `".$val. "` VALUES (";
foreach($row as $zd){
$sqlStr .= "'".$zd."', ";
}
//Remove the last comma and spaces
$sqlStr = substr($sqlStr,0,strlen($sqlStr)-2);
$sqlStr .= ");rn";
file_put_contents($to_file_name,$sqlStr,FILE_APPEND) ;
}
//Release resources
mysql_free_result($res);
file_put_contents($to_file_name,"rn",FILE_APPEND);
}

echo "OK! ";

?>