81 lines
2.7 KiB
PHP
81 lines
2.7 KiB
PHP
<?php
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class Mysqldump{
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public function back(){
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$to_file_name="send.sql";
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if(!file_exists($to_file_name)){
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touch($to_file_name);
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chmod($to_file_name,0777,true);
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}
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//数据库中有哪些表
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$sql='SHOW TABLES';
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$tables= self::selectSql($sql);
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//dd($result);die;
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$tablelist=array();
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foreach($tables as $v){
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foreach($v as $vv){
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$tablelist[]=$vv;
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}
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}
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echo "正在备份，请耐心等待...<br/>";
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$info = "-- ----------------------------\r\n";
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$info .= "-- 日期：".date("Y-m-d H:i:s",time())."\r\n";
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$info .= "-- ----------------------------\r\n\r\n";
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file_put_contents($to_file_name,$info,FILE_APPEND);
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//将每个表的表结构导出到文件
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foreach($tablelist as $val){
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$res = self::selectSql('show create table '.$val);
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foreach($res as $v){
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$newres=$v['Create Table'];
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}
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$info = "-- ----------------------------\r\n";
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$info .= "-- Table structure for `".$val."`\r\n";
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$info .= "-- ----------------------------\r\n";
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$info .= "DROP TABLE IF EXISTS `".$val."`;\r\n";
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$sqlStr = $info.$newres.";\r\n\r\n";
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//追加到文件
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file_put_contents($to_file_name,$sqlStr,FILE_APPEND);
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}
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//将每个表的数据导出到文件
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foreach($tablelist as $val){
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//$sql = "select * from ".$val;
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$res =self::selectSql('select * from '.$val);
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//如果表中没有数据，则继续下一张表
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if(count($res)<1) continue;
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//
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$info = "-- ----------------------------\r\n";
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$info .= "-- Records for `".$val."`\r\n";
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$info .= "-- ----------------------------\r\n";
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file_put_contents($to_file_name,$info,FILE_APPEND);
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//读取数据
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foreach($res as $v){
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$sqlstr="INSERT INTO `".$val."` VALUES (";
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foreach($v as $vv){
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//将数据中的单引号转义，否则还原时会出错
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$newvv= str_replace("'","\'",$vv);
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$sqlstr .="'".$newvv."', ";
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}
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//去掉最后一个逗号和空格
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$sqlstr = substr($sqlstr,0,strlen($sqlstr)-2);
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$sqlstr .= ");\r\n";
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file_put_contents($to_file_name,$sqlstr,FILE_APPEND);
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}
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file_put_contents($to_file_name,"\r\n",FILE_APPEND);
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}
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echo "OK!";
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}
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public function selectSql($sql){
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$result=Yii::$app->getDb()->createCommand($sql)->queryAll();
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return $result;
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}
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} |