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Tutorial.Parsing text

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Database fields

phpBB3 uses the following database fields where BBCode is allowed (forum description, forum rules, post content, ...):

  • foo - the text itself
  • foo_bbcode_uid - a randomly generated unique identifier to mark the bbcodes identified by the first pass encoding (which uses regular expressions) so they can be replaced using the quicker str_replace in the second pass.
  • foo_bbcode_bitfield - a bit field containing the information which bbcode is used in the text so only the relavant ones need to be loaded from the database.
  • foo_options - a bit field containing the information whether bbcode, smilies and magic urls are enabled (OPTION_FLAG_BBCODE, OPTION_FLAG_SMILIES and OPTION_FLAG_LINKS). Sometimes you will find this separated into enable_bbcode, enable_smilies and enable_magic_url

column names vary from table to table.

Parsing text with BBCodes, smilies etc.

Inserting text to the DB

$text utf8_normalize_nfc(request_var('text'''true));
$uid $bitfield $options ''// will be modified by generate_text_for_storage
$allow_bbcode $allow_urls $allow_smilies true;
generate_text_for_storage($text$uid$bitfield$options$allow_bbcode$allow_urls$allow_smilies);

$sql_ary = array(
    
'text'              => $text,
    
'bbcode_uid'        => $uid,
    
'bbcode_bitfield'   => $bitfield,
    
'bbcode_options'    => $options,
);

$sql 'INSERT INTO ' YOUR_TABLE ' ' $db->sql_build_array('INSERT'$sql_ary);
$db->sql_query($sql);

The above method uses the bbcode options database field which is used in many places instead of enable_smiles, enable_bbcode and enable_magic_url

Here is how to insert it into the database using the enable_smilies, enable_bbcode and enable_magic_url tables

$text utf8_normalize_nfc(request_var('text'''true));
$uid $bitfield $options ''// will be modified by generate_text_for_storage
$allow_bbcode $allow_urls $allow_smilies true;
generate_text_for_storage($text$uid$bitfield$options$allow_bbcode$allow_urls$allow_smilies);

$sql_ary = array(
    
'text'              => $text,
    
'bbcode_uid'        => $uid,
    
'bbcode_bitfield'   => $bitfield,
    
'enable_bbcode'     => $allow_bbcode,
    
'enable_magic_url'  => $allow_urls,
    
'enable_smilies'    => $allow_smilies,
);

$sql 'INSERT INTO ' YOUR_TABLE ' ' $db->sql_build_array('INSERT'$sql_ary);
$db->sql_query($sql);

Displaying text downloaded from DB

This example uses the bbcode_options field which is used in forums and groups description parsing:

$sql 'SELECT text, bbcode_uid, bbcode_bitfield, bbcode_options
    FROM ' 
YOUR_TABLE;
$result $db->sql_query($sql);
$row $db->sql_fetchrow($result);
$db->sql_freeresult($result);

$text generate_text_for_display($row['text'], $row['bbcode_uid'], $row['bbcode_bitfield'], $row['bbcode_options']);

echo 
$text;


The next one uses the enable_bbcode, enable_smilies and enable_magic_url flags which can be used instead of the above method and is used in parsing posts:

$sql 'SELECT text, bbcode_uid, bbcode_bitfield, enable_bbcode, enable_smilies, enable_magic_url
    FROM ' 
YOUR_TABLE;
$result $db->sql_query($sql);
$row $db->sql_fetchrow($result);
$db->sql_freeresult($result);

$row['bbcode_options'] = (($row['enable_bbcode']) ? OPTION_FLAG_BBCODE 0) +
    ((
$row['enable_smilies']) ? OPTION_FLAG_SMILIES 0) + 
    ((
$row['enable_magic_url']) ? OPTION_FLAG_LINKS 0);
$text generate_text_for_display($row['text'], $row['bbcode_uid'], $row['bbcode_bitfield'], $row['bbcode_options']);

echo 
$text;

Generating text for editing

$sql 'SELECT text, bbcode_uid
    FROM ' 
YOUR_TABLE;
$result $db->sql_query_limit($sql1);
$row $db->sql_fetchrow($result);
$db->sql_freeresult($result);

decode_message($row['text'], $row['bbcode_uid']);

echo 
$row['text'];

The database options to use for the fields


`bbcode_bitfield` varchar(255) collate utf8_bin NOT NULL default '',
`bbcode_uid` varchar(8) collate utf8_bin NOT NULL,
`bbcode_options` mediumint(4) collate utf8_bin NOT NULL,


See Also