Specific implementation of php exporting the entire mysql database to generate sql files_PHP tutorial

Found on the Internet, there have been changes.

File name: db_backup.php

The source code is as follows:

Copy code The code is as follows:

ini_set("max_execution_time", "180");//Avoid excessive data volume and incomplete export.

/*

Program function: mysql database backup function
Author: Tang Xiaogang
Description:
This program is mainly extracted from mysqladmin and made certain adjustments , I hope it will be helpful to everyone when backing up data when programming in PHP.
If you do not want to back up the structure: please delete this sentence: echo get_table_structure($dbname, $table, $crlf).";$crlf$crlf";
If you do not want to back up content: please screen this sentence: echo get_table_content($dbname, $table, $crlf);

Modifier: He Jinsheng
Modification time: 2009/11/7
Modified content: Added function get_table_structure, commented out function get_table_def, in order to obtain richer details when creating a table (such as: ENGINE=InnoDB AUTO_INCREMENT=80 DEFAULT CHARSET=utf8 COLLATE=utf8_unicode_ci COMMENT='Product information change information' )
*/

$host="";//Database address

$dbname="";//Configure the database name here

$username=" ";//Username

$passw="";//Configure password here

$filename=date("Y-m-d_H-i-s")."-".$dbname. ".sql";
header("Content-disposition:filename=".$filename);//The saved file name
header("Content-type:application/octetstream"); ​​
header ("Pragma:no-cache");
header("Expires:0");

//Backup data
$i = 0;
$crlf="rn";
global $dbconn;
$dbconn = mysql_connect($host,$username,$passw]);//Database host, username, password
$db = mysql_select_db($dbname,$dbconn);
mysql_query("SET NAMES 'utf8'");
$tables =mysql_list_tables($dbname,$dbconn);
$num_tables = @mysql_numrows($tables);
print "-- filename =".$filename;
while($i < $num_tables)
{
$table=mysql_tablename($tables,$i);
print $crlf;
echo get_table_structure( $dbname, $table, $crlf).";$crlf$crlf";
//echo get_table_def($dbname, $table, $crlf).";$crlf$crlf";
echo get_table_content( $dbname, $table, $crlf);
$i++;
}

/*Newly added get detailed table structure*/
function get_table_structure($db,$table,$ crlf)
{
global $drop;

$schema_create = "";
if(!empty($drop)){ $schema_create .= "DROP TABLE IF EXISTS `$table `;$crlf";}
$result =mysql_db_query($db, "SHOW CREATE TABLE $table");
$row=mysql_fetch_array($result);
$schema_create .= $crlf." -- ".$row[0].$crlf;
$schema_create .= $row[1].$crlf;
Return $schema_create;
}

/*
//Others originally obtained the database structure, but it was incomplete
function get_table_def($db,$table,$crlf)
{
global $drop;

$schema_create = "" ;
if(!empty($drop))
$schema_create .= "DROP TABLE IF EXISTS `$table`;$crlf";

$schema_create .= "CREATE TABLE `$table ` ($crlf";
$result = mysql_db_query($db, "SHOW full FIELDS FROM $table");
while($row = mysql_fetch_array($result))
{
$schema_create .= " `$row[Field]` $row[Type]";

if(isset($row["Default"]) && (!empty($row["Default"]) || $row["Default"] == "0"))
$schema_create .= " DEFAULT '$row[Default]'";
if($row["Null"] != "YES")
$schema_create .= " NOT NULL";
if($row["Extra"] != "")
$schema_create .= " $row[Extra]";
if($ row["Comment"] != "")
$schema_create .= " Comment '$row[Comment]'";
$schema_create .= ",$crlf";
}
$ schema_create = ereg_replace(",".$crlf."$", "", $schema_create);
$result = mysql_db_query($db, "SHOW KEYS FROM $table");
while($row = mysql_fetch_array($result))
{
$kname=$row['Key_name'];
if(($kname != "PRIMARY") && ($row['Non_unique'] == 0 ))
$kname="UNIQUE|$kname";
if(!isset($index[$kname]))
$index[$kname] = array();
$index [$kname][] = $row['Column_name'];
}

while(list($x,$columns) = @each($index))
{
$schema_create .= ",$crlf";
if($x == "PRIMARY")
$schema_create .= " PRIMARY KEY (".implode($columns,", ") . ")";
elseif (substr($x,0,6) == "UNIQUE")
$schema_create .= " UNIQUE ".substr($x,7)." (" . implode($columns, ", ") . ")";
else
$schema_create .= " KEY $x (" . implode($columns, ", ") . ")";
}

$ schema_create .= "$crlf)";
return (stripslashes($schema_create));
}
*/

//Get table content
function get_table_content($db, $table, $crlf)
{
$schema_create = "";
$temp = "";
$result = mysql_db_query($db, "SELECT * FROM $table");
$i = 0;
while($row = mysql_fetch_row($result))
{
$schema_insert = "INSERT INTO `$table` VALUES (";
for($j=0 ; $j{
if(!isset($row[$j]))
$schema_insert .= " NULL,";
elseif( $row[$j] != "")
$schema_insert .= " '".addslashes($row[$j])."',";
else
$schema_insert .= " ' ',";
}
$schema_insert = ereg_replace(",$", "",$schema_insert);
$schema_insert .= ");$crlf";
$temp = $temp .$schema_insert ;
$i++;
}
return $temp;
}
?>

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