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# mysql_free_result

(PHP 3, PHP 4 , PHP 5)

mysql_free_result -- Free result memory

## Description

bool mysql_free_result ( resource result)

mysql_free_result() will free all memory associated with the result identifier result.

mysql_free_result() only needs to be called if you are concerned about how much memory is being used for queries that return large result sets. All associated result memory is automatically freed at the end of the script's execution.

成功回傳`TRUE`失敗回傳`FALSE`。

If a non-resource is used for the result, an error of level E_WARNING will be emitted. It's worth noting that mysql_query() only returns a resource for SELECT, SHOW, EXPLAIN, and DESCRIBE queries.

示範 1.A mysql_free_result() example
`<?php $result = mysql_query("SELECT id,email FROM people WHERE id = '42'"); if (!$result) { echo 'Could not run query: ' . mysql_error(); exit; } /* Use the result, assuming we're done with it afterwords */ $row = mysql_fetch_assoc($result); /* Now we free up the result and continue on with our script */ mysql_free_result($result); echo $row['id']; echo $row['email']; ?>`

For downward compatibility mysql_freeresult() can also be used. This is deprecated, however.

See also mysql_query() and is_resource().

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