mysql 备份的PHP脚本
PHP代码
- // 备份数据库
- function sqldumptable($table, $fp=0) {
- $tabledump = "DROP TABLE IF EXISTS `$table`;\n";
- $tabledump .= "CREATE TABLE `$table` (\n";
- $firstfield=1;
- $fields = mysql_query("SHOW FIELDS FROM `$table`");
- while ($field = mysql_fetch_array($fields)) {
- if (!$firstfield) {
- $tabledump .= ",\n";
- } else {
- $firstfield=0;
- }
- $tabledump .= " `$field[Field]` $field[Type]";
- if (!emptyempty($field["Default"])) {
- if($field['Default']!=‘CURRENT_TIMESTAMP’ ) $field['Default'] = "'{$field['Default']}’";
- $tabledump .= " DEFAULT $field[Default]";
- }
- if ($field['Null'] != "YES") {
- $tabledump .= " NOT NULL";
- }
- if ($field['Extra'] != "") {
- $tabledump .= " $field[Extra]";
- }
- }
- mysql_free_result($fields);
- $keys = mysql_query("SHOW KEYS FROM `$table`");
- while ($key = mysql_fetch_array($keys)) {
- $kname=$key['Key_name'];
- if ($kname != "PRIMARY" and $key['Non_unique'] == 0) {
- $kname="UNIQUE|$kname";
- }
- if(!is_array($index[$kname])) {
- $index[$kname] = array();
- }
- $index[$kname][] = $key['Column_name'];
- }
- mysql_free_result($keys);
- while(list($kname, $columns) = @each($index)) {
- $tabledump .= ",\n";
- $colnames=implode($columns,",");
- if ($kname == "PRIMARY") {
- $tabledump .= " PRIMARY KEY ($colnames)";
- } else {
- if (substr($kname,0,6) == "UNIQUE") {
- $kname=substr($kname,7);
- }
- $tabledump .= " KEY $kname ($colnames)";
- }
- }
- $tabledump .= "\n);\n\n";
- if ($fp) {
- fwrite($fp,$tabledump);
- } else {
- echo $tabledump;
- }
- $rows = mysql_query("SELECT * FROM `$table`");
- $numfields = mysql_num_fields($rows);
- while ($row = mysql_fetch_array($rows)) {
- $tabledump = "INSERT INTO `$table` VALUES(";
- $fieldcounter=-1;
- $firstfield=1;
- while (++$fieldcounter<$numfields) {
- if (!$firstfield) {
- $tabledump.=", ";
- } else {
- $firstfield=0;
- }
- if (!isset($row[$fieldcounter])) {
- $tabledump .= "NULL";
- } else {
- $tabledump .= "’".mysql_escape_string($row[$fieldcounter])."’";
- }
- }
- $tabledump .= ");\n";
- if ($fp) {
- fwrite($fp,$tabledump);
- } else {
- echo $tabledump;
- }
- }
- mysql_free_result($rows);
- fwrite($fp,"\n\n\n");
- }
- ?> </li> </ol> </div>