多次元配列を特定の値でソートするための PHP コード

 $arr = array(
 "0" => array(line_num => "10", happens_time => "2007-11-19 10:25:04+08" ),
 "1" => array(line_num => "9", happens_time => "2007-11-19 10:25:04+08"),
 "2" => array(line_num = > "25"、発生時刻 => "2007-11-19 10:25:04+08")
 );
 print_r($arr);
 echo "";
 echo "< ;br />gt;";
 echo "";
 uasort( $arr,create_function('$a, $b', 'return $a['line_num'] < $b['line_num '];') );
 print_r($arr);
 echo "";
 echo "";
 echo "";
 foreach( $arr as $key => $value) {
 $ar[] = $value;
 }
 print_r($ar);
?>

出結果： 配列 ( [0] => 配列 ( [行番号] => 10 [発生時刻] => 2007-11-19 10:25:04+08 ) [1] => 配列 ( [行番号] => 9 [発生時刻] => 2007-11-19 10:25:04+08 ) [2] => 配列 ( [行番号] => 25 [発生時刻] => 2007-11-19 10:25:04+08 ) )


配列 ( [2] => 配列 ( [行番号] => 25 [発生時刻] => 2007-11-19 10:25:04+08 ) [0] => 配列 ( [行番号] => 10 [発生時刻] => 2007-11-19 10:25:04+08 ) [1] => 配列 ( [行番号] => 9 [発生時刻] => 2007-11-19 10:25:04+08 ) )


配列 ( [0] => 配列 ( [行番号] => 25 [発生時刻] => 2007-11-19 10:25:04+08 ) [1] => 配列 ( [行番号] => 10 [発生時刻] => 2007-11-19 10:25:04+08 ) [2] => 配列 ( [行番号] => 9 [発生時刻] => 2007-11-19 10:25:04+08 ) )

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