Comments on: Backup Your MySQL Database Using PHP http://davidwalsh.name/backup-mysql-database-php Legendary scribbles about JavaScript, HTML5, AJAX, PHP, CSS, and ∞. Tue, 22 May 2012 05:31:04 +0000 hourly 1 http://wordpress.org/?v=3.3.2 By: Marcushttp://davidwalsh.name/backup-mysql-database-php#comment-32183 Marcus Mon, 14 May 2012 16:01:31 +0000 http://davidwalsh.name/?p=336#comment-32183 Sharing my improvements: (sorry - my linefeeds got smashed-up, I am trying to improve) I programmed a small extension to handle numeric values explicitly. This leads to: - better standard conformity (no quotes for numeric values) - less file space required (removing quotes) - speedup (skip escaping for numeric values)HowTo: 1. Create an array with all numeric types. 2. Get attribute-types for actual table, strip redundant information (in brackets). 3. Setup an array $numflag indicating numeric datatype for each attribute 4. Assign numeric values without quotes.CODE Snippets: <code>//1..at the top of function $numtypes=array('tinyint','smallint','mediumint','int','bigint','float','double','decimal','real');//2.. at the top of table-loop $typesarr=mysql_fetch_array(mysql_query('SHOW COLUMNS FROM '.$table));//3.. below 2 for($i=0; $i<$num_fields; $i++) { $acttype=trim(preg_replace('/\s*\([^)]*\)/', '', $typesarr[$i]['Type']));// strip brackets from type if (is_numeric(array_search($acttype,$numtypes))){//numeric type false cannot be checked correctly $numflag[$i]=1;}else{$numflag[$i]=0;} }//4.. in the fields loop (innermost) if ($numflag[$j]==1){$return.= $row[$j] ; } else{ $row[$j] = addslashes($row[$j]); $row[$j] = preg_replace("/\r\n/","\\r\\n",$row[$j]); $return.= '"'.$row[$j].'"' ; } </code>Thanks to David and all other Contributors Marcus Sharing my improvements:
(sorry – my linefeeds got smashed-up, I am trying to improve)
I programmed a small extension to handle numeric values explicitly.
This leads to:
- better standard conformity (no quotes for numeric values)
- less file space required (removing quotes)
- speedup (skip escaping for numeric values)

HowTo:
1. Create an array with all numeric types.
2. Get attribute-types for actual table, strip redundant information (in brackets).
3. Setup an array $numflag indicating numeric datatype for each attribute
4. Assign numeric values without quotes.

CODE Snippets:

//1..at the top of function
$numtypes=array('tinyint','smallint','mediumint','int','bigint','float','double','decimal','real');

//2.. at the top of table-loop
$typesarr=mysql_fetch_array(mysql_query('SHOW COLUMNS FROM '.$table));

//3.. below 2
for($i=0; $i<$num_fields; $i++) {
$acttype=trim(preg_replace('/\s*\([^)]*\)/', '', $typesarr[$i]['Type']));// strip brackets from type
if (is_numeric(array_search($acttype,$numtypes))){//numeric type false cannot be checked correctly
$numflag[$i]=1;}else{$numflag[$i]=0;}
}

//4.. in the fields loop (innermost)
if ($numflag[$j]==1){$return.= $row[$j] ; } else{
$row[$j] = addslashes($row[$j]);
$row[$j] = preg_replace("/\r\n/","\\r\\n",$row[$j]);
$return.= '"'.$row[$j].'"' ;
}

Thanks to David and all other Contributors
Marcus

]]> By: Marcushttp://davidwalsh.name/backup-mysql-database-php#comment-32182 Marcus Mon, 14 May 2012 15:53:40 +0000 http://davidwalsh.name/?p=336#comment-32182 Sharing my improvements: I programmed a small extension to handle numeric values explicitly. This leads to: - better standard conformity (no quotes for numeric values) - less file space required (removing quotes) - speedup (skip escaping for numeric values)HowTo: 1. Create an array with all numeric types. 2. Get attribute-types for actual table, strip redundant information (in brackets). 3. Setup an array $numflag indicating numeric datatype for each attribute 4. Assign numeric values without quotes.CODE Snippets: <code>//1..at the top of function $numtypes=array('tinyint','smallint','mediumint','int','bigint','float','double','decimal','real');//2.. at the top of table-loop $typesarr=mysql_fetch_array(mysql_query('SHOW COLUMNS FROM '.$table));//3.. below 2 for($i=0; $i<$num_fields; $i++) { $acttype=trim(preg_replace('/\s*\([^)]*\)/', '', $typesarr[$i]['Type']));// strip brackets from type if (is_numeric(array_search($acttype,$numtypes))){//numeric type false cannot be checked correctly $numflag[$i]=1;}else{$numflag[$i]=0;} }//4.. in the fields loop (innermost) if ($numflag[$j]==1){$return.= $row[$j] ; } else{ $aarr[$j] = addslashes($row[$j]); $aarr[$j] = preg_replace("/\r\n/","\\r\\n",$row[$j]); $return.= '"'.$row[$j].'"' ; } </code>Thanks to David and all other Contributors Marcus Sharing my improvements:
I programmed a small extension to handle numeric values explicitly.
This leads to:
- better standard conformity (no quotes for numeric values)
- less file space required (removing quotes)
- speedup (skip escaping for numeric values)

HowTo:
1. Create an array with all numeric types.
2. Get attribute-types for actual table, strip redundant information (in brackets).
3. Setup an array $numflag indicating numeric datatype for each attribute
4. Assign numeric values without quotes.

CODE Snippets:

//1..at the top of function
$numtypes=array('tinyint','smallint','mediumint','int','bigint','float','double','decimal','real');

//2.. at the top of table-loop
$typesarr=mysql_fetch_array(mysql_query('SHOW COLUMNS FROM '.$table));

//3.. below 2
for($i=0; $i<$num_fields; $i++) {
$acttype=trim(preg_replace('/\s*\([^)]*\)/', '', $typesarr[$i]['Type']));// strip brackets from type
if (is_numeric(array_search($acttype,$numtypes))){//numeric type false cannot be checked correctly
$numflag[$i]=1;}else{$numflag[$i]=0;}
}

//4.. in the fields loop (innermost)
if ($numflag[$j]==1){$return.= $row[$j] ; } else{
$aarr[$j] = addslashes($row[$j]);
$aarr[$j] = preg_replace("/\r\n/","\\r\\n",$row[$j]);
$return.= '"'.$row[$j].'"' ;
}

Thanks to David and all other Contributors
Marcus

]]> By: arifhossenhttp://davidwalsh.name/backup-mysql-database-php#comment-32164 arifhossen Sun, 13 May 2012 11:16:01 +0000 http://davidwalsh.name/?p=336#comment-32164 Thanks a lot, Great Article. Thanks a lot, Great Article.

]]> By: Ahmad Alihttp://davidwalsh.name/backup-mysql-database-php#comment-32116 Ahmad Ali Wed, 09 May 2012 19:58:41 +0000 http://davidwalsh.name/?p=336#comment-32116 This code is very much helpful for developers and users as wel. It helps me a lot to get backups of my mysql databases. Thanks a lot. This code is very much helpful for developers and users as wel. It helps me a lot to get backups of my mysql databases. Thanks a lot.

]]> By: Marcushttp://davidwalsh.name/backup-mysql-database-php#comment-32096 Marcus Wed, 09 May 2012 08:46:28 +0000 http://davidwalsh.name/?p=336#comment-32096 Thanks DavidYour script is great. I just tested to transform your script to PDO: It works, however SHOW CREATE TABLE seems not to accept a PDO-Parameter for TABLEThank you Marcus Thanks David

Your script is great.
I just tested to transform your script to PDO:
It works, however SHOW CREATE TABLE seems not to accept a PDO-Parameter for TABLE

Thank you
Marcus

]]> By: Brandonhttp://davidwalsh.name/backup-mysql-database-php#comment-32060 Brandon Mon, 07 May 2012 17:30:49 +0000 http://davidwalsh.name/?p=336#comment-32060 Great script, thanks for creating/posting this! Great script, thanks for creating/posting this!

]]> By: Wardhttp://davidwalsh.name/backup-mysql-database-php#comment-32059 Ward Mon, 07 May 2012 17:29:56 +0000 http://davidwalsh.name/?p=336#comment-32059 Great time saver! Will definitely set this up as a cron and sleep easier at night! Great time saver! Will definitely set this up as a cron and sleep easier at night!

]]> By: blackhoothttp://davidwalsh.name/backup-mysql-database-php#comment-31979 blackhoot Wed, 02 May 2012 00:37:05 +0000 http://davidwalsh.name/?p=336#comment-31979 you're missing a bracket, and some of this doesn't make sense. Ah, shame... if only I could just use shell_exec()... blah. you’re missing a bracket, and some of this doesn’t make sense. Ah, shame… if only I could just use shell_exec()… blah.

]]> By: Kenneth Purtellhttp://davidwalsh.name/backup-mysql-database-php#comment-31884 Kenneth Purtell Thu, 26 Apr 2012 11:14:44 +0000 http://davidwalsh.name/?p=336#comment-31884 Great stuff David. You got me out of a tight spot. Thanks. Great stuff David. You got me out of a tight spot. Thanks.

]]> By: Cj Belohttp://davidwalsh.name/backup-mysql-database-php#comment-31881 Cj Belo Thu, 26 Apr 2012 08:48:20 +0000 http://davidwalsh.name/?p=336#comment-31881 Hi,Is this applicable in large database like more than 1gb?Thanks, Hi,

Is this applicable in large database like more than 1gb?

Thanks,

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