一段导出数据库的代码

导出数据|数据库

一段导出数据库的代码
 
//
$dbname="mytest";
$filename="file.sql";
mysql_pconnect ("localhost:3306","root","");
//
function sqldumptable($table) {
global $DB_site;
$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] $field[Type]";
if (!empty($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);

// get each key info
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") {
// key is unique
$kname=substr($kname,7);
}

$tabledump .= " KEY $kname ($colnames)";

}
}

$tabledump .= "\n);\n\n";

// get data
$rows = mysql_query("SELECT * FROM $table");
$numfields=mysql_num_fields($rows);
while ($row = mysql_fetch_array($rows)) {
$tabledump .= "INSERT INTO $table VALUES(";

$fieldcounter=-1;
$firstfield=1;
// get each field's data
while (++$fieldcounterif (!$firstfield) {
$tabledump.=",";
} else {
$firstfield=0;
}

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if (!isset($row[$fieldcounter])) {
$tabledump .= "NULL";
} else {
$tabledump .= "'".addslashes($row[$fieldcounter])."'";
}
}

$tabledump .= ");\n";
}
mysql_free_result($rows);

return $tabledump;
}
//函数结束
//
$result = mysql_list_tables ($dbname);
$i = 0;
while ($i $tb_names[$i] = mysql_tablename ($result, $i);
$dump.=sqldumptable($tb_names[$i])."\n\n\n";
$i++;
}

echo $dump;//可以在浏览器里输出看看
$filehandle=fopen($filename,"w");
fwrite($filehandle,$dump."\n\n\n");
fclose($filehandle);

echo "

数据成功导出!