(PHP 4 >= 4.3.0, PHP 5, PHP 7)
pg_meta_data — Get meta data for table
pg_meta_data ( resource $connection , string $table_name [, bool $extended = false ] ) : array
 pg_meta_data() returns table definition for table_name as an array. 
connection
PostgreSQL database connection resource.
table_name
The name of the table.
extended
 Flag for returning extended meta data. Default to false. 
 An array of the table definition, or false on error. 
Example #1 Getting table metadata
<?php
  $dbconn = pg_connect("dbname=publisher") or die("Could not connect");
  $meta = pg_meta_data($dbconn, 'authors');
  if (is_array($meta)) {
      echo '<pre>';
      var_dump($meta);
      echo '</pre>';
  }
?> The above example will output:
array(3) {
["author"]=>
array(5) {
  ["num"]=>
  int(1)
  ["type"]=>
  string(7) "varchar"
  ["len"]=>
  int(-1)
  ["not null"]=>
  bool(false)
  ["has default"]=>
  bool(false)
}
["year"]=>
array(5) {
  ["num"]=>
  int(2)
  ["type"]=>
  string(4) "int2"
  ["len"]=>
  int(2)
  ["not null"]=>
  bool(false)
  ["has default"]=>
  bool(false)
}
["title"]=>
array(5) {
  ["num"]=>
  int(3)
  ["type"]=>
  string(7) "varchar"
  ["len"]=>
  int(-1)
  ["not null"]=>
  bool(false)
  ["has default"]=>
  bool(false)
}
}
| Version | Description | 
|---|---|
| 5.6.0 |  No longer experimental. Added "is enum" as default attribute. extended flag is added.  |  
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    https://www.php.net/manual/en/function.pg-meta-data.php