备份mysql

+<?php
+
+
+include_once "../vendor/autoload.php";
+
+$dir = __DIR__."/mysql_back/";
+if(!is_dir($dir)){
+    mkdir($dir,0775,true);
+}
+
+$tables = db()->query("show tables;")->fetchAll();
+
+
+foreach ($tables as $table){
+    $table = array_values($table)[0];
+
+    $name = $dir.$table.".create.sql";
+    _echo("正在备份表结构 ".$table);
+    // 显示表结构
+    $c = db()->query("show create table {$table}")->fetch();
+
+    file_put_contents($name,$c['Create Table']);
+
+    if(in_array($table,['lists_auto','lists','bodies','bodies_back','lists_hot'])){
+        continue;
+    }
+
+    $datafile = $dir.$table.'.'.date('Ymd').".data.json";
+    $p = 0;
+    $limit = 1000;
+    while (1){
+        echo "当前备份 $p 页\r";
+        $lists = db()->all("select * from `{$table}` limit {$limit} offset ".($p*$limit));
+        if($lists){
+            foreach ($lists as $list)
+                file_put_contents($datafile,json_encode($list,true),FILE_APPEND);
+        }else{
+            break;
+        }
+        $p++;
+
+    }
+
+    echo "\n";
+
+}
+
+