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<?php

/* 
 * ¸ù¾ÝteacheridÅÅÐò
 */

echo "<pre>";

$teachers = array(
	0 => array(
		'num' => 10,
		'teacherid' => 2003,
		'name' => 'zs'
	),	
	1 => array(
		'num' => 1,
		'teacherid' => 2002,
		'name' => 'ls'
	),
	2 => array(
		'num' => 6,
		'teacherid' => 2001,
		'name' => 'ww'
	),
	3 => array(
		'num' => 5,
		'teacherid' => 2001,
		'name' => 'll'
	)
);

print_r($teachers);
$teacher = mySort($teachers, 'teacherid', SORT_ASC, SORT_STRING);
print_r($teacher);


/**
 * ÅÅÐò·½·¨
 * @param type $teachers
 * @param type $sort_key
 * @param type $order
 * @param type $type
 */
function mySort($teachers, $sort_key, $order, $type)
{
	foreach ($teachers as $teacher)
	{
		if(is_array($teacher))
		{
			$newArr[] = $teacher[$sort_key];
		}
		else
		{
			return false;
		}
	}
	
	array_multisort($newArr, $order, $type, $teachers);
	return $teachers;
}