dba_firstkey()

(PHP 4, PHP 5, PHP 7)

Fetch first key

说明

dba_firstkey() returns the first key of the database and resets the internal key pointer. This permits a linear search through the whole database.

参数

The database handler, returned by dba_open() or dba_popen().

返回值

Returns the key on success 或者在失败时返回FALSE.

参见

• dba_nextkey()Fetch next key
• dba_key_split()Splits a key in string representation into array representation
• Example 2 in the DBA examples

Looks like Jacky is using some DB object? I don't know if it's native to PHP or written on it's own... Anyways this is what I use:
$DBCon = dba_open("/tmp/test_db.db2", "r", "db2") or die("Uh oh, can't open the database :(");
if ($the_key = dba_firstkey($DBCon)) do {
  print("Key: $the_key  Value:");
  print dba_fetch($the_key, $DBCon);
  print("
");
} while ($the_key = dba_nextkey($DBCon));
print ("


Well looks like we're done here :-)");

for ($key = dba_firstkey($this->handle); $key !== false; $key = dba_nextkey($this->handle)) {
      $keyset[] = $key;
    } // end for

I wondered why it wasn't already written, so I did because I think working with associative arrays is always as comfortable as can be 

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