Not all functions are supported by all builds. It depends on your libpq (The PostgreSQL C client library) version and how libpq is compiled. If PHP PostgreSQL extensions are missing, then it is because your libpq version does not support them.
Most PostgreSQL functions accept
connectionas the optional first parameter. If it is not provided, the last opened connection is used. If it doesn't exist, functions return
PostgreSQL automatically folds all identifiers (e.g. table/column names) to lower-case values at object creation time and at query time. To force the use of mixed or upper case identifiers, you must escape the identifier using double quotes ("").
PostgreSQL does not have special commands for fetching database schema information (eg. all the tables in the current database). Instead, there is a standard schema named information_schema in PostgreSQL 7.4 and above containing system views with all the necessary information, in an easily queryable form. See the » PostgreSQL Documentation for full details.
Table of Contents
- pg_affected_rows - Returns number of affected records (tuples)
- pg_cancel_query - Cancel an asynchronous query
- pg_client_encoding - Gets the client encoding
- pg_close - Closes a PostgreSQL connection
- pg_connect - Open a PostgreSQL connection
- pg_connection_busy - Get connection is busy or not
- pg_connection_reset - Reset connection (reconnect)
- pg_connection_status - Get connection status
- pg_convert - Convert associative array values into suitable for SQL statement
- pg_copy_from - Insert records into a table from an array
- pg_copy_to - Copy a table to an array
- pg_dbname - Get the database name
- pg_delete - Deletes records
- pg_end_copy - Sync with PostgreSQL backend
- pg_escape_bytea - Escape a string for insertion into a bytea field
- pg_escape_identifier - Escape a identifier for insertion into a text field
- pg_escape_literal - Escape a literal for insertion into a text field
- pg_escape_string - Escape a string for query
- pg_execute - Sends a request to execute a prepared statement with given parameters, and waits for the result.
- pg_fetch_all_columns - Fetches all rows in a particular result column as an array
- pg_fetch_all - Fetches all rows from a result as an array
- pg_fetch_array - Fetch a row as an array
- pg_fetch_assoc - Fetch a row as an associative array
- pg_fetch_object - Fetch a row as an object
- pg_fetch_result - Returns values from a result resource
- pg_fetch_row - Get a row as an enumerated array
- pg_field_is_null - Test if a field is SQL NULL
- pg_field_name - Returns the name of a field
- pg_field_num - Returns the field number of the named field
- pg_field_prtlen - Returns the printed length
- pg_field_size - Returns the internal storage size of the named field
- pg_field_table - Returns the name or oid of the tables field
- pg_field_type_oid - Returns the type ID (OID) for the corresponding field number
- pg_field_type - Returns the type name for the corresponding field number
- pg_free_result - Free result memory
- pg_get_notify - Gets SQL NOTIFY message
- pg_get_pid - Gets the backend's process ID
- pg_get_result - Get asynchronous query result
- pg_host - Returns the host name associated with the connection
- pg_insert - Insert array into table
- pg_last_error - Get the last error message string of a connection
- pg_last_notice - Returns the last notice message from PostgreSQL server
- pg_last_oid - Returns the last row's OID
- pg_lo_close - Close a large object
- pg_lo_create - Create a large object
- pg_lo_export - Export a large object to file
- pg_lo_import - Import a large object from file
- pg_lo_open - Open a large object
- pg_lo_read_all - Reads an entire large object and send straight to browser
- pg_lo_read - Read a large object
- pg_lo_seek - Seeks position within a large object
- pg_lo_tell - Returns current seek position a of large object
- pg_lo_unlink - Delete a large object
- pg_lo_write - Write to a large object
- pg_meta_data - Get meta data for table
- pg_num_fields - Returns the number of fields in a result
- pg_num_rows - Returns the number of rows in a result
- pg_options - Get the options associated with the connection
- pg_parameter_status - Looks up a current parameter setting of the server.
- pg_pconnect - Open a persistent PostgreSQL connection
- pg_ping - Ping database connection
- pg_port - Return the port number associated with the connection
- pg_prepare - Submits a request to create a prepared statement with the given parameters, and waits for completion.
- pg_put_line - Send a NULL-terminated string to PostgreSQL backend
- pg_query_params - Submits a command to the server and waits for the result, with the ability to pass parameters separately from the SQL command text.
- pg_query - Execute a query
- pg_result_error_field - Returns an individual field of an error report.
- pg_result_error - Get error message associated with result
- pg_result_seek - Set internal row offset in result resource
- pg_result_status - Get status of query result
- pg_select - Select records
- pg_send_execute - Sends a request to execute a prepared statement with given parameters, without waiting for the result(s).
- pg_send_prepare - Sends a request to create a prepared statement with the given parameters, without waiting for completion.
- pg_send_query_params - Submits a command and separate parameters to the server without waiting for the result(s).
- pg_send_query - Sends asynchronous query
- pg_set_client_encoding - Set the client encoding
- pg_set_error_verbosity - Determines the verbosity of messages returned by pg_last_error and pg_result_error.
- pg_trace - Enable tracing a PostgreSQL connection
- pg_transaction_status - Returns the current in-transaction status of the server.
- pg_tty - Return the TTY name associated with the connection
- pg_unescape_bytea - Unescape binary for bytea type
- pg_untrace - Disable tracing of a PostgreSQL connection
- pg_update - Update table
- pg_version - Returns an array with client, protocol and server version (when available)