Run a script on every column of every table in your MySQL database

Have you ever needed to recursively run a script in a loop on every single column in your MySQL database?  This PHP code can help.
// Start by getting the list of tables.
$tables_result = mysql_query("SHOW TABLES FROM `$database`") or exit("Error " . mysql_errno() . ": " . mysql_error());
while ($tables_row = mysql_fetch_row($tables_result)) {
 // Loop through the tables.  Get the list of columns from each table.
 $table = $tables_row[0];
 $columns_result = mysql_query("SHOW COLUMNS FROM `$table`") or exit("Error " . mysql_errno() . ": " . mysql_error());
 while ($columns_row = mysql_fetch_row($columns_result)) {
  // Loop through the columns in the table.
  $column = $columns_row[0];
  /* --------- Anything you want happens between here... --------- */
  echo "$table $column\n"; 
  /* ---------------------- ...and, here =) ---------------------- */


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