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/inc/ -> db_base.php (source)

   1  <?php
   2  /**
   3   * MyBB 1.8
   4   * Copyright 2014 MyBB Group, All Rights Reserved
   5   *
   6   * Website: http://www.mybb.com
   7   * License: http://www.mybb.com/about/license
   8   *
   9   */
  10  
  11  /**
  12   * @property string title The title of the database access layer.
  13   * @property string short_title The short title of the database access layer.
  14   * @property string type The type of db software being used.
  15   * @property int query_count A count of the number of queries.
  16   * @property array querylist A list of the performed queries.
  17   * @property float query_time The time spent performing queries.
  18   * @property string engine The engine used to run the SQL database.
  19   * @property bool can_search Whether or not this engine can use the search functionality.
  20   */
  21  interface DB_Base
  22  {
  23      /**
  24       * Connect to the database server.
  25       *
  26       * @param array $config Array of DBMS connection details.
  27       * @return resource|PDOStatement|mysqli_result The DB connection resource. Returns false on fail or -1 on a db connect failure.
  28       */
  29  	function connect($config);
  30  
  31      /**
  32       * Query the database.
  33       *
  34       * @param string $string The query SQL.
  35       * @param integer|bool $hide_errors 1 if hide errors, 0 if not.
  36       * @param integer 1 $write_query if executes on master database, 0 if not.
  37       * @return resource|PDOStatement|mysqli_result The query data.
  38       */
  39  	function query($string, $hide_errors=0, $write_query=0);
  40  
  41      /**
  42       * Execute a write query on the master database
  43       *
  44       * @param string $query The query SQL.
  45       * @param boolean|int $hide_errors 1 if hide errors, 0 if not.
  46       * @return resource|PDOStatement|mysqli_result The query data.
  47       */
  48  	function write_query($query, $hide_errors=0);
  49  
  50      /**
  51       * Explain a query on the database.
  52       *
  53       * @param string $string The query SQL.
  54       * @param string $qtime The time it took to perform the query.
  55       */
  56  	function explain_query($string, $qtime);
  57  
  58      /**
  59       * Return a result array for a query.
  60       *
  61       * @param resource|PDOStatement|mysqli_result $query The query ID.
  62       * @param int $resulttype The type of array to return. Specified with the different constants for the type using
  63       *
  64       * @return array The array of results.
  65       */
  66  	function fetch_array($query, $resulttype=1);
  67  
  68      /**
  69       * Return a specific field from a query.
  70       *
  71       * @param resource|PDOStatement|mysqli_result $query The query ID.
  72       * @param string $field The name of the field to return.
  73       * @param int|boolean $row The number of the row to fetch it from.
  74       */
  75  	function fetch_field($query, $field, $row=false);
  76  
  77      /**
  78       * Moves internal row pointer to the next row
  79       *
  80       * @param resource|PDOStatement|mysqli_result $query The query ID.
  81       * @param int $row The pointer to move the row to.
  82       */
  83  	function data_seek($query, $row);
  84  
  85      /**
  86       * Return the number of rows resulting from a query.
  87       *
  88       * @param resource|PDOStatement|mysqli_result $query The query ID.
  89       * @return int The number of rows in the result.
  90       */
  91  	function num_rows($query);
  92  
  93      /**
  94       * Return the last id number of inserted data.
  95       *
  96       * @return int The id number.
  97       */
  98  	function insert_id();
  99  
 100      /**
 101       * Close the connection with the DBMS.
 102       *
 103       */
 104  	function close();
 105  
 106      /**
 107       * Return an error number.
 108       *
 109       * @return int The error number of the current error.
 110       */
 111  	function error_number();
 112  
 113      /**
 114       * Return an error string.
 115       *
 116       * @return string The explanation for the current error.
 117       */
 118  	function error_string();
 119  
 120      /**
 121       * Output a database error.
 122       *
 123       * @param string $string The string to present as an error.
 124       */
 125  	function error($string="");
 126  
 127      /**
 128       * Returns the number of affected rows in a query.
 129       *
 130       * @return int The number of affected rows.
 131       */
 132  	function affected_rows();
 133  
 134      /**
 135       * Return the number of fields.
 136       *
 137       * @param resource|PDOStatement|mysqli_result $query The query ID.
 138       * @return int The number of fields.
 139       */
 140  	function num_fields($query);
 141  
 142      /**
 143       * Lists all functions in the database.
 144       *
 145       * @param string $database The database name.
 146       * @param string $prefix Prefix of the table (optional)
 147       * @return array The table list.
 148       */
 149  	function list_tables($database, $prefix='');
 150  
 151      /**
 152       * Check if a table exists in a database.
 153       *
 154       * @param string $table The table name.
 155       * @return boolean True when exists, false if not.
 156       */
 157  	function table_exists($table);
 158  
 159      /**
 160       * Check if a field exists in a database.
 161       *
 162       * @param string $field The field name.
 163       * @param string $table The table name.
 164       * @return boolean True when exists, false if not.
 165       */
 166  	function field_exists($field, $table);
 167  
 168      /**
 169       * Add a shutdown query.
 170       *
 171       * @param resource|PDOStatement|mysqli_result $query The query data.
 172       * @param string $name An optional name for the query.
 173       */
 174  	function shutdown_query($query, $name='');
 175  
 176      /**
 177       * Performs a simple select query.
 178       *
 179       * @param string $table The table name to be queried.
 180       * @param string $fields Comma delimited list of fields to be selected.
 181       * @param string $conditions SQL formatted list of conditions to be matched.
 182       * @param array $options List of options: group by, order by, order direction, limit, limit start.
 183       * @return resource|PDOStatement|mysqli_result The query data.
 184       */
 185  	function simple_select($table, $fields="*", $conditions="", $options=array());
 186  
 187      /**
 188       * Build an insert query from an array.
 189       *
 190       * @param string $table The table name to perform the query on.
 191       * @param array $array An array of fields and their values.
 192       * @return int The insert ID if available
 193       */
 194  	function insert_query($table, $array);
 195  
 196      /**
 197       * Build one query for multiple inserts from a multidimensional array.
 198       *
 199       * @param string $table The table name to perform the query on.
 200       * @param array $array An array of inserts.
 201       * @return void
 202       */
 203  	function insert_query_multiple($table, $array);
 204  
 205      /**
 206       * Build an update query from an array.
 207       *
 208       * @param string $table The table name to perform the query on.
 209       * @param array $array An array of fields and their values.
 210       * @param string $where An optional where clause for the query.
 211       * @param string $limit An optional limit clause for the query.
 212       * @param boolean $no_quote An option to quote incoming values of the array.
 213       * @return resource|PDOStatement|mysqli_result The query data.
 214       */
 215  	function update_query($table, $array, $where="", $limit="", $no_quote=false);
 216  
 217      /**
 218       * Build a delete query.
 219       *
 220       * @param string $table The table name to perform the query on.
 221       * @param string $where An optional where clause for the query.
 222       * @param string $limit An optional limit clause for the query.
 223       * @return resource|PDOStatement|mysqli_result The query data.
 224       */
 225  	function delete_query($table, $where="", $limit="");
 226  
 227      /**
 228       * Escape a string according to the MySQL escape format.
 229       *
 230       * @param string $string The string to be escaped.
 231       * @return string The escaped string.
 232       */
 233  	function escape_string($string);
 234  
 235      /**
 236       * Frees the resources of a query.
 237       *
 238       * @param resource|PDOStatement|mysqli_result $query The query to destroy.
 239       * @return boolean Returns true on success, false on faliure
 240       */
 241  	function free_result($query);
 242  
 243      /**
 244       * Escape a string used within a like command.
 245       *
 246       * @param string $string The string to be escaped.
 247       * @return string The escaped string.
 248       */
 249  	function escape_string_like($string);
 250  
 251      /**
 252       * Gets the current version of MySQL.
 253       *
 254       * @return string Version of MySQL.
 255       */
 256  	function get_version();
 257  
 258      /**
 259       * Optimizes a specific table.
 260       *
 261       * @param string $table The name of the table to be optimized.
 262       */
 263  	function optimize_table($table);
 264  
 265      /**
 266       * Analyzes a specific table.
 267       *
 268       * @param string $table The name of the table to be analyzed.
 269       */
 270  	function analyze_table($table);
 271  
 272      /**
 273       * Show the "create table" command for a specific table.
 274       *
 275       * @param string $table The name of the table.
 276       * @return string The SQL command to create the specified table.
 277       */
 278  	function show_create_table($table);
 279  
 280      /**
 281       * Show the "show fields from" command for a specific table.
 282       *
 283       * @param string $table The name of the table.
 284       * @return array Field info for that table
 285       */
 286  	function show_fields_from($table);
 287  
 288      /**
 289       * Returns whether or not the table contains a fulltext index.
 290       *
 291       * @param string $table The name of the table.
 292       * @param string $index Optionally specify the name of the index.
 293       * @return boolean True or false if the table has a fulltext index or not.
 294       */
 295  	function is_fulltext($table, $index="");
 296  
 297      /**
 298       * Returns whether or not this database engine supports fulltext indexing.
 299       *
 300       * @param string $table The table to be checked.
 301       * @return boolean True or false if supported or not.
 302       */
 303  	function supports_fulltext($table);
 304  
 305      /**
 306       * Checks to see if an index exists on a specified table
 307       *
 308       * @param string $table The name of the table.
 309       * @param string $index The name of the index.
 310       */
 311  	function index_exists($table, $index);
 312  
 313      /**
 314       * Returns whether or not this database engine supports boolean fulltext matching.
 315       *
 316       * @param string $table The table to be checked.
 317       * @return boolean True or false if supported or not.
 318       */
 319  	function supports_fulltext_boolean($table);
 320  
 321      /**
 322       * Creates a fulltext index on the specified column in the specified table with optional index name.
 323       *
 324       * @param string $table The name of the table.
 325       * @param string $column Name of the column to be indexed.
 326       * @param string $name The index name, optional.
 327       */
 328  	function create_fulltext_index($table, $column, $name="");
 329  
 330      /**
 331       * Drop an index with the specified name from the specified table
 332       *
 333       * @param string $table The name of the table.
 334       * @param string $name The name of the index.
 335       */
 336  	function drop_index($table, $name);
 337  
 338      /**
 339       * Drop an table with the specified table
 340       *
 341       * @param string $table The name of the table.
 342       * @param boolean $hard Hard drop - no checking
 343       * @param boolean $table_prefix Use table prefix?
 344       */
 345  	function drop_table($table, $hard=false, $table_prefix=true);
 346  
 347      /**
 348       * Renames a table
 349       *
 350       * @param string $old_table The old table name
 351       * @param string $new_table the new table name
 352       * @param boolean $table_prefix Use table prefix?
 353       */
 354  	function rename_table($old_table, $new_table, $table_prefix=true);
 355  
 356      /**
 357       * Replace contents of table with values
 358       *
 359       * @param string $table The table
 360       * @param array $replacements The replacements
 361       * @param string|array $default_field The default field(s)
 362       * @param boolean $insert_id Whether or not to return an insert id. True by default
 363       */
 364  	function replace_query($table, $replacements=array(), $default_field="", $insert_id=true);
 365  
 366      /**
 367       * Drops a column
 368       *
 369       * @param string $table The table
 370       * @param string $column The column name
 371       */
 372  	function drop_column($table, $column);
 373  
 374      /**
 375       * Adds a column
 376       *
 377       * @param string $table The table
 378       * @param string $column The column name
 379       * @param string $definition The new column definition
 380       */
 381  	function add_column($table, $column, $definition);
 382  
 383      /**
 384       * Modifies a column
 385       *
 386       * @param string $table The table
 387       * @param string $column The column name
 388       * @param string $new_definition the new column definition
 389       * @param boolean|string $new_not_null Whether to "drop" or "set" the NOT NULL attribute (no change if false)
 390       * @param boolean|string $new_default_value The new default value, or false to drop the attribute
 391       * @return bool Returns true if all queries are executed successfully or false if one of them failed
 392       */
 393  	function modify_column($table, $column, $new_definition, $new_not_null=false, $new_default_value=false);
 394  
 395      /**
 396       * Renames a column
 397       *
 398       * @param string $table The table
 399       * @param string $old_column The old column name
 400       * @param string $new_column the new column name
 401       * @param string $new_definition the new column definition
 402       * @param boolean|string $new_not_null Whether to "drop" or "set" the NOT NULL attribute (no change if false)
 403       * @param boolean|string $new_default_value The new default value, or false to drop the attribute
 404       * @return bool Returns true if all queries are executed successfully
 405       */
 406  	function rename_column($table, $old_column, $new_column, $new_definition, $new_not_null=false, $new_default_value=false);
 407  
 408      /**
 409       * Sets the table prefix used by the simple select, insert, update and delete functions
 410       *
 411       * @param string $prefix The new table prefix
 412       */
 413  	function set_table_prefix($prefix);
 414  
 415      /**
 416       * Fetched the total size of all mysql tables or a specific table
 417       *
 418       * @param string $table The table (optional)
 419       * @return integer the total size of all mysql tables or a specific table
 420       */
 421  	function fetch_size($table='');
 422  
 423      /**
 424       * Fetch a list of database character sets this DBMS supports
 425       *
 426       * @return array|bool Array of supported character sets with array key being the name, array value being display name. False if unsupported
 427       */
 428  	function fetch_db_charsets();
 429  
 430      /**
 431       * Fetch a database collation for a particular database character set
 432       *
 433       * @param string $charset The database character set
 434       * @return string|bool The matching database collation, false if unsupported
 435       */
 436  	function fetch_charset_collation($charset);
 437  
 438      /**
 439       * Fetch a character set/collation string for use with CREATE TABLE statements. Uses current DB encoding
 440       *
 441       * @return string The built string, empty if unsupported
 442       */
 443  	function build_create_table_collation();
 444  
 445      /**
 446       * Time how long it takes for a particular piece of code to run. Place calls above & below the block of code.
 447       *
 448       * @deprecated
 449       */
 450  	function get_execution_time();
 451  
 452      /**
 453       * Binary database fields require special attention.
 454       *
 455       * @param string $string Binary value
 456       * @return string Encoded binary value
 457       */
 458  	function escape_binary($string);
 459  
 460      /**
 461       * Unescape binary data.
 462       *
 463       * @param string $string Binary value
 464       * @return string Encoded binary value
 465       */
 466  	function unescape_binary($string);
 467  }


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