How to deal with Apostrophe while writing into Mysql database

This question already has an answer here:

The process of encoding data which contains characters MySQL might interpret is called "escaping". You must escape your strings with mysql_real_escape_string , which is a PHP function, not a MySQL function, meaning you have to run it in PHP before you pass your query to the database. You must escape any data that comes into your program from an external source. Any data that isn't escaped is a potential SQL injection.

You have to escape your data before you build your query. Also, you can build your query programatically using PHP's looping constructs and range :

// Build tag fields    
$tags = 'tag' . implode(', tag', range(1,30));

// Escape each value in the uniqkey array
$values = array_map('mysql_real_escape_string', $uniqkey);

// implode values with quotes and commas
$values = "'" . implode("', '", $values) . "'";

$query = "INSERT INTO alltags (id, $tags) VALUES ('', $values)";    

mysql_query($query) or die(mysql_error());

Using mysql_real_escape_string is a safer approach to handling characters for SQL insertion/updating:

INSERT INTO YOUR_TABLE
VALUES
  (mysql_real_escape_string($var1),
   mysql_real_escape_string($var2))

Also, I'd change your columns back from TEXT to VARCHAR - searching, besides indexing, works much better.

Update for your update

Being that id is an auto_increment column you can:

INSERT INTO alltags
  (tag1,tag2,tag3,tag4,tag5,tag6,tag7,tag8,tag9,tag10,tag11,tag12,tag13,tag14,tag15,tag16,tag17,tag18,tag19,tag20,tag21,tag22,tag23,tag24,tag25,tag26,tag27,tag28,tag29,tag30)
VALUES      
  (mysql_real_escape_string($uniqkey[0]),mysql_real_escape_string($uniqkey[1]),mysql_real_escape_string($uniqkey[2]),mysql_real_escape_string($uniqkey[3]),mysql_real_escape_string($uniqkey[4]),mysql_real_escape_string($uniqkey[5]),mysql_real_escape_string($uniqkey[6]),mysql_real_escape_string($uniqkey[7]),mysql_real_escape_string($uniqkey[8]),mysql_real_escape_string($uniqkey[9]),mysql_real_escape_string($uniqkey[10]),mysql_real_escape_string($uniqkey[11]),mysql_real_escape_string($uniqkey[12]),mysql_real_escape_string($uniqkey[13]),mysql_real_escape_string($uniqkey[14]),mysql_real_escape_string($uniqkey[15]),mysql_real_escape_string($uniqkey[16]),mysql_real_escape_string($uniqkey[17]),mysql_real_escape_string($uniqkey[18]),mysql_real_escape_string($uniqkey[19]),mysql_real_escape_string($uniqkey[20]),mysql_real_escape_string($uniqkey[21]),mysql_real_escape_string($uniqkey[22]),mysql_real_escape_string($uniqkey[23]),mysql_real_escape_string($uniqkey[24]),mysql_real_escape_string($uniqkey[25]),mysql_real_escape_string($uniqkey[26]),mysql_real_escape_string($uniqkey[27]),mysql_real_escape_string($uniqkey[28]),mysql_real_escape_string($uniqkey[29])) "; 

Here's an example using NULL as the id placeholder:

INSERT INTO alltags
  (id,tag1,tag2,tag3,tag4,tag5,tag6,tag7,tag8,tag9,tag10,tag11,tag12,tag13,tag14,tag15,tag16,tag17,tag18,tag19,tag20,tag21,tag22,tag23,tag24,tag25,tag26,tag27,tag28,tag29,tag30)
 VALUES      
  (NULL,mysql_real_escape_string($uniqkey[0]),mysql_real_escape_string($uniqkey[1]),mysql_real_escape_string($uniqkey[2]),mysql_real_escape_string($uniqkey[3]),mysql_real_escape_string($uniqkey[4]),mysql_real_escape_string($uniqkey[5]),mysql_real_escape_string($uniqkey[6]),mysql_real_escape_string($uniqkey[7]),mysql_real_escape_string($uniqkey[8]),mysql_real_escape_string($uniqkey[9]),mysql_real_escape_string($uniqkey[10]),mysql_real_escape_string($uniqkey[11]),mysql_real_escape_string($uniqkey[12]),mysql_real_escape_string($uniqkey[13]),mysql_real_escape_string($uniqkey[14]),mysql_real_escape_string($uniqkey[15]),mysql_real_escape_string($uniqkey[16]),mysql_real_escape_string($uniqkey[17]),mysql_real_escape_string($uniqkey[18]),mysql_real_escape_string($uniqkey[19]),mysql_real_escape_string($uniqkey[20]),mysql_real_escape_string($uniqkey[21]),mysql_real_escape_string($uniqkey[22]),mysql_real_escape_string($uniqkey[23]),mysql_real_escape_string($uniqkey[24]),mysql_real_escape_string($uniqkey[25]),mysql_real_escape_string($uniqkey[26]),mysql_real_escape_string($uniqkey[27]),mysql_real_escape_string($uniqkey[28]),mysql_real_escape_string($uniqkey[29])) "; 

I want to really stress that you should not setup your columns like that.

Slight improvement of meagar's answer:

EDIT: meagar updated his post, so his answer is now better.

$query = 'INSERT INTO alltags (id, ';

// append tag1, tag2, etc.
$query .= 'tag' . implode(', tag', range(1, 30)) . ") VALUES ('', ";

// escape each value in the uniqkey array
$escaped_tags = array_map('mysql_real_escape_string', $uniqkey);

// implode values with quotes and commas, and add closing bracket
$query .= "'" . implode("', '", $escaped_tags) . "')";

// actually query
mysql_query($query) or die(mysql_error());

上一篇: 真正的转义字符串和PDO

下一篇: 在写入Mysql数据库时如何处理撇号