PHP Functions Essential Reference

unset

void unset(mixed variable, [mixed another_variable], [mixed...]) 

Unsets one or more variables.

Returns:

Nothing

Description:

unset() deletes one or more variables. The function returns nothing—attempting to assign its return value to a variable simply results in PHP generating a parse error. If you want to ensure that the value has been deleted, use the isset() function.

Availability:

UNIX, Windows

Version:

3+, 4+

Example:

Use unset()

<pre> <?php $song = array ( 'name' => 'Another Second to Be', 'band' => 'Accept', 'album' => 'Russian Roulette', 'year' => 1986 ); print "<tt>$song</tt> before calling unset:\n"; print_r ($song); // Individual array elements can be unset print "\n<tt>\$song</tt> after calling <tt>unset (\$song['year']):</tt>\n"; ...