尺寸匹配

matchSize.php

// 先判定宽高比，再判定宽高
$sizeArr = explode("x", $p['screen']);
$screenWidth  = $sizeArr['0'];
$screenHeight = $sizeArr['1'];
if ($screenHeight)
    $wh = $screenWidth / $screenHeight;
$tmpArr = array();

// 根据 宽高比最小差值,宽最小差值,高最小差值 进行排序，顶部为最合适的尺寸
foreach ($splashArr as $info) {
    $tmp = abs($wh - $info['icon_width'] / $info['icon_height']) * 1000000;
    $tmp += abs($screenWidth - $info['icon_width']);
    $tmp += abs($screenHeight - $info['icon_height']);
    $tmpArr[$tmp] = $info;
}
ksort($tmpArr);

// 最合适的尺寸列表，在前三条记录里，需要按宽再进行一次判定，防止出现上面宽的差值与高的差值相反的情况
$cou = 0;
$tmp = null;
$useScreen = array();
foreach ($tmpArr as $key => $info) {
    if (++$cou > 3 ) {
        break;
    }
    if (is_null($tmp) || $tmp > abs($screenWidth - $info['icon_width'])) {
        $tmp = abs($screenWidth - $info['icon_width']);
        $useScreen = $info;
    }
}

$splashArr = $useScreen;
$op['splash']['url'] = $splashArr['icon_url'];
$op['splash']['start_ts'] = strtotime($splashArr['start_ts']);
$op['splash']['end_ts'] = strtotime($splashArr['end_ts']);
$op['splash']['display_time'] = $splashArr['display_time'];