PHP backup database class sharing_PHP tutorial-PHP Tutorial-php.cn

PHP backup database class sharing_PHP tutorial

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Release： 2016-07-13 09:57:24

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PHP backup database class sharing

/**

* @name php backup database

* @param string $DbHost connection host

* @param string $DbUser username

* @param string $DbPwd connection password

* @param string $DbName The database to be backed up

* @param string $saveFileName The name of the file to be saved. The default file is saved in the current folder, distinguished by date

* @return Null

* @example backupMySqlData('localhost', 'root', '123456', 'YourDbName');

function backupMySqlData($DbHost, $DbUser, $DbPwd, $DbName, $saveFileName = '')

{

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

error_reporting(0);

set_time_limit(0);

echo 'Data is being backed up, please wait...
';

$link = mysql_connect($DbHost, $DbUser, $DbPwd) or die('Database connection failed: ' . mysql_error());

mysql_select_db($DbName) or die('Database connection failed: ' . mysql_error());

mysql_query('set names utf8');

//Declare variables

$isDropInfo = '';

$insertSQL = '';

$row = array();

$tables = array();

$tableStructure = array();

$fileName = ($saveFileName ? $saveFileName : 'MySQL_data_bakeup_') . date('YmdHis') . '.sql';

// Enumerate all tables in this database

$res = mysql_query("SHOW TABLES FROM $DbName");

while ($row = mysql_fetch_row($res)) {

$tables[] = $row[0];

}

mysql_free_result($res);

// Enumerate the creation statements of all tables

foreach ($tables as $val) {

$res = mysql_query("show create table $val", $link);

$row = mysql_fetch_row($res);

$isDropInfo = "DROP TABLE IF EXISTS `" . $val . "`;rn";

$tableStructure = $isDropInfo . $row[1] . ";rn";

file_put_contents($fileName, $tableStructure, FILE_APPEND);

mysql_free_result($res);

}

// Enumerate INSERT statements of all tables

foreach ($tables as $val) {

$res = mysql_query("select * from $val");

//Tables with no data will not perform insert

while ($row = mysql_fetch_row($res)) {

$sqlStr = "INSERT INTO `".$val."` VALUES (";

foreach($row as $v){

$sqlStr .= "'$v',";

}

//Remove the last comma

$sqlStr = substr($sqlStr, 0, strlen($sqlStr) - 1);

$sqlStr .= ");rn";

file_put_contents($fileName, $sqlStr, FILE_APPEND);

}

mysql_free_result($res);

}

echo 'Data backup successful! ';

}

// Call this method

backupMySqlData('localhost', 'root', '123456', 'YouDbName');