(PHP 4 >= 4.3.0, PHP 5, PHP 7, PHP 8)
pg_select — Select records
$connection
,$table_name
,$conditions
,$flags
= PGSQL_DML_EXEC
,$mode
= PGSQL_ASSOC
pg_select() selects records specified by conditions
which has field=>value
. For a successful query, it returns an array containing all records and fields that match the condition specified by conditions
.
If flags
is set, pg_convert() is applied to conditions
with the specified flags.
If mode
is set, the return value will be in the form of an array with PGSQL_NUM
, an associative array with PGSQL_ASSOC
(default) or both with PGSQL_BOTH
.
By default pg_select() passes raw values. Values must be escaped or PGSQL_DML_ESCAPE option must be specified. PGSQL_DML_ESCAPE quotes and escapes parameters/identifiers. Therefore, table/column names became case sensitive.
Note that neither escape nor prepared query can protect LIKE query, JSON, Array, Regex, etc. These parameters should be handled according to their contexts. i.e. Escape/validate values.
connection
An PgSql\Connection instance.
table_name
Name of the table from which to select rows.
conditions
An array whose keys are field names in the table table_name
, and whose values are the conditions that a row must meet to be retrieved.
flags
Any number of PGSQL_CONV_FORCE_NULL
, PGSQL_DML_NO_CONV
, PGSQL_DML_ESCAPE
, PGSQL_DML_EXEC
, PGSQL_DML_ASYNC
or PGSQL_DML_STRING
combined. If PGSQL_DML_STRING
is part of the flags
then the query string is returned. When PGSQL_DML_NO_CONV
or PGSQL_DML_ESCAPE
is set, it does not call pg_convert() internally.
mode
Any number of PGSQL_ASSOC
, PGSQL_NUM
or PGSQL_BOTH
If PGSQL_ASSOC
is set the return value will be an associative array, with PGSQL_NUM
the return value will be an array, and with PGSQL_BOTH
the return value will be both an associative and numerically indexed array.
Returns string if PGSQL_DML_STRING
is passed via flags
, otherwise it returns an array on success, or false
on failure.
Version | Description |
---|---|
8.1.0 | The connection parameter expects an PgSql\Connection instance now; previously, a resource was expected. |
7.1.0 | The mode parameter was added. |
Example #1 pg_select() example
<?php
$db = pg_connect('dbname=foo');
// This is safe somewhat, since all values are escaped.