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   1 # ArrayIterator pq\Gateway\Table\Attributes::getIterator()
   2
   3 Implements IteratorAggregate.
   4
   5 ## Params:
   6
   7 None.
   8
   9 ## Returns:
  10
  11 ArrayIterator, columnd list (indexed by column number **and** name).
  12
  13 ## Example:
  14
  15         <?php
  16
  17         use pq\Gateway\Table;
  18
  19         class ColNameIterator extends FilterIterator {
  20                 public function __construct(Table\Attributes $attrs) {
  21                         parent::__construct($attrs->getIterator());
  22                 }
  23                 public function accept() {
  24                         return !is_numeric($this->key());
  25                 }
  26         }
  27
  28         $table = new pq\Gateway\Table("account");
  29         $attrs = $table->getAttributes();
  30         foreach (new ColNameIterator($attrs) as $col => $att) {
  31                 printf("%10s: %s\n", $col, http_build_query($att, null, ", "));
  32         }
  33
  34         ?>
  35
  36 Yields:
  37
  38                         id: index=1, name=id, type=2950, hasdefault=1, nullable=0
  39           password: index=2, name=password, type=1042, hasdefault=0, nullable=1
  40                   name: index=3, name=name, type=1043, hasdefault=0, nullable=1