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EZ SQL, modified slightly for WP use.

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git-svn-id: http://svn.automattic.com/wordpress/trunk@112 1a063a9b-81f0-0310-95a4-ce76da25c4cd
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saxmatt 2003-05-28 08:41:04 +00:00
parent fe76341b15
commit cb0702c078
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<?php
// ==================================================================
// Author: Justin Vincent (justin@visunet.ie)
// Web: http://php.justinvincent.com
// Name: ezSQL
// Desc: Class to make it very easy to deal with mySQL database connections.
// WordPress is using this class to make the code cleaner and faster.
// We highly recommend it.
// We have modified the HTML it returns slightly.
define('EZSQL_DB_USER', ""); // <-- mysql db user
define('EZSQL_DB_PASSWORD', ""); // <-- mysql db password
define('EZSQL_DB_NAME', "mysql"); // <-- mysql db pname
define('EZSQL_DB_HOST', 'localhost'); // <-- mysql server host
define('EZSQL_VERSION', '1.21');
define('OBJECT', 'OBJECT', true);
define('ARRAY_A', 'ARRAY_A', true);
define('ARRAY_N', 'ARRAY_N', true);
// The Main Class, renamed to avoid conflicts.
class wpdb {
var $debug_called;
var $vardump_called;
var $show_errors = true;
// ==================================================================
// DB Constructor - connects to the server and selects a database
function wpdb($dbuser, $dbpassword, $dbname, $dbhost)
{
$this->dbh = @mysql_connect($dbhost,$dbuser,$dbpassword);
if ( ! $this->dbh )
{
$this->print_error("<ol id='error'>
<li><strong>Error establishing a database connection!</strong></li>
<li>Are you sure you have the correct user/password?</li>
<li>Are you sure that you have typed the correct hostname?</li>
<li>Are you sure that the database server is running?</li>
</ol>");
}
$this->select($dbname);
}
// ==================================================================
// Select a DB (if another one needs to be selected)
function select($db)
{
if ( !@mysql_select_db($db,$this->dbh))
{
$this->print_error("<ol id='error'>
<li><strong>Error selecting database <u>$db</u>!</strong></li>
<li>Are you sure it exists?</li>
<li>Are you sure there is a valid database connection?</li>
</ol>");
}
}
// ====================================================================
// Format a string correctly for safe insert under all PHP conditions
function escape($str)
{
return mysql_escape_string(stripslashes($str));
}
// ==================================================================
// Print SQL/DB error.
function print_error($str = '')
{
// All errors go to the global error array $EZSQL_ERROR..
global $EZSQL_ERROR;
// If no special error string then use mysql default..
if ( !$str ) $str = mysql_error();
// Log this error to the global array..
$EZSQL_ERROR[] = array
(
'query' => $this->last_query,
'error_str' => $str
);
// Is error output turned on or not..
if ( $this->show_errors )
{
// If there is an error then take note of it
print "<ol id='error'>
<li><strong>SQL/DB Error --</strong></li>
<li>[<font color=000077>$str</font>]</li>
</ol>";
}
else
{
return false;
}
}
// ==================================================================
// Turn error handling on or off..
function show_errors()
{
$this->show_errors = true;
}
function hide_errors()
{
$this->show_errors = false;
}
// ==================================================================
// Kill cached query results
function flush()
{
// Get rid of these
$this->last_result = null;
$this->col_info = null;
$this->last_query = null;
}
// ==================================================================
// Basic Query - see docs for more detail
function query($query)
{
// Flush cached values..
$this->flush();
// Log how the function was called
$this->func_call = "\$db->query(\"$query\")";
// Keep track of the last query for debug..
$this->last_query = $query;
// Perform the query via std mysql_query function..
$this->result = mysql_query($query, $this->dbh);
// If there was an insert, delete or update see how many rows were affected
// (Also, If there there was an insert take note of the insert_id
$query_type = array('insert','delete','update','replace');
// loop through the above array
foreach ( $query_type as $word )
{
// This is true if the query starts with insert, delete or update
if ( preg_match("/^\\s*$word /i",$query) )
{
$this->rows_affected = mysql_affected_rows();
// This gets the insert ID
if ( $word == 'insert' || $word == 'replace' )
{
$this->insert_id = mysql_insert_id($this->dbh);
}
$this->result = false;
}
}
if ( mysql_error() )
{
// If there is an error then take note of it..
$this->print_error();
}
else
{
// In other words if this was a select statement..
if ( $this->result )
{
// =======================================================
// Take note of column info
$i=0;
while ($i < @mysql_num_fields($this->result))
{
$this->col_info[$i] = @mysql_fetch_field($this->result);
$i++;
}
// =======================================================
// Store Query Results
$i=0;
while ( $row = @mysql_fetch_object($this->result) )
{
// Store relults as an objects within main array
$this->last_result[$i] = $row;
$i++;
}
// Log number of rows the query returned
$this->num_rows = $i;
@mysql_free_result($this->result);
// If there were results then return true for $db->query
if ( $i )
{
return true;
}
else
{
return false;
}
}
else
{
// Update insert etc. was good..
return true;
}
}
}
// ==================================================================
// Get one variable from the DB - see docs for more detail
function get_var($query=null, $x=0, $y=0)
{
// Log how the function was called
$this->func_call = "\$db->get_var(\"$query\",$x,$y)";
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// Extract var out of cached results based x,y vals
if ( $this->last_result[$y] )
{
$values = array_values(get_object_vars($this->last_result[$y]));
}
// If there is a value return it else return null
return (isset($values[$x]) && $values[$x]!=='')?$values[$x]:null;
}
// ==================================================================
// Get one row from the DB - see docs for more detail
function get_row($query=null, $output=OBJECT, $y=0)
{
// Log how the function was called
$this->func_call = "\$db->get_row(\"$query\",$output,$y)";
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// If the output is an object then return object using the row offset..
if ( $output == OBJECT )
{
return $this->last_result[$y]?$this->last_result[$y]:null;
}
// If the output is an associative array then return row as such..
elseif ( $output == ARRAY_A )
{
return $this->last_result[$y]?get_object_vars($this->last_result[$y]):null;
}
// If the output is an numerical array then return row as such..
elseif ( $output == ARRAY_N )
{
return $this->last_result[$y]?array_values(get_object_vars($this->last_result[$y])):null;
}
// If invalid output type was specified..
else
{
$this->print_error(" \$db->get_row(string query, output type, int offset) -- Output type must be one of: OBJECT, ARRAY_A, ARRAY_N");
}
}
// ==================================================================
// Function to get 1 column from the cached result set based in X index
// se docs for usage and info
function get_col($query=null,$x=0)
{
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// Extract the column values
for ( $i=0; $i < count($this->last_result); $i++ )
{
$new_array[$i] = $this->get_var(null,$x,$i);
}
return $new_array;
}
// ==================================================================
// Return the the query as a result set - see docs for more details
function get_results($query=null, $output = OBJECT)
{
// Log how the function was called
$this->func_call = "\$db->get_results(\"$query\", $output)";
// If there is a query then perform it if not then use cached results..
if ( $query )
{
$this->query($query);
}
// Send back array of objects. Each row is an object
if ( $output == OBJECT )
{
return $this->last_result;
}
elseif ( $output == ARRAY_A || $output == ARRAY_N )
{
if ( $this->last_result )
{
$i=0;
foreach( $this->last_result as $row )
{
$new_array[$i] = get_object_vars($row);
if ( $output == ARRAY_N )
{
$new_array[$i] = array_values($new_array[$i]);
}
$i++;
}
return $new_array;
}
else
{
return null;
}
}
}
// ==================================================================
// Function to get column meta data info pertaining to the last query
// see docs for more info and usage
function get_col_info($info_type='name', $col_offset=-1)
{
if ( $this->col_info )
{
if ( $col_offset == -1 )
{
$i=0;
foreach($this->col_info as $col )
{
$new_array[$i] = $col->{$info_type};
$i++;
}
return $new_array;
}
else
{
return $this->col_info[$col_offset]->{$info_type};
}
}
}
}
$wpdb = new wpdb(EZSQL_DB_USER, EZSQL_DB_PASSWORD, EZSQL_DB_NAME, EZSQL_DB_HOST);
?>