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Website Programming in PHP / MYSQL
mysql_list_fields
(PHP 4, PHP 5, PECL mysql:1.0)
mysql_list_fields — List MySQL table fields
Description
Retrieves information about the given table name.
This function is deprecated. It is preferable to use mysql_query() to issue a SQL SHOW COLUMNS FROM table [LIKE 'name'] statement instead.
Parameters
- database_name
-
The name of the database that's being queried.
- table_name
-
The name of the table that's being queried.
- link_identifier
-
The MySQL connection. If the link identifier is not specified, the last link opened by mysql_connect() is assumed. If no such link is found, it will try to create one as if mysql_connect() was called with no arguments. If by chance no connection is found or established, an E_WARNING level error is generated.
Return Values
A result pointer resource on success, or FALSE on failure.
The returned result can be used with mysql_field_flags(), mysql_field_len(), mysql_field_name() and mysql_field_type().
Examples
Example #1 Alternate to deprecated mysql_list_fields()
<?php
$result = mysql_query("SHOW COLUMNS FROM sometable");
if (!$result) {
echo 'Could not run query: ' . mysql_error();
exit;
}
if (mysql_num_rows($result) > 0) {
while ($row = mysql_fetch_assoc($result)) {
print_r($row);
}
}
?>
The above example will output something similar to:
Array ( [Field] => id [Type] => int(7) [Null] => [Key] => PRI [Default] => [Extra] => auto_increment ) Array ( [Field] => email [Type] => varchar(100) [Null] => [Key] => [Default] => [Extra] => )
Notes
Note: For backward compatibility, the following deprecated alias may be used: mysql_listfields()
