代码之家 › 专栏 › 技术社区 › Sasha

php-do/while如果结果为空,则转到数组中的下一个

php

Sasha · 技术社区 · 6 年前

$radiusList = [
    '2'   => '2km',
    '5'   => '5km',
    '10'  => '10km',
    '25'  => '25km',
    '50'  => '50km',
    '100' => '100km',
    '200' => '200km',
    '500' => '500km',
];

我正在通过获取当前选定的半径

$radius = $_POST['radius'] ? $_POST['radius'] : 2;

如果结果是空的,我必须去下一个半径。这是我的

$clinics     = [];
$radiusCount =  count($radiusList);
$i = 0;

do {

    $radius  = $radiusList[$radius];

    $clinics = $this->clinicQuery($conditionsQuery, $lat, $lng, $radius);
    $i++;

} while  (!empty($clinics) && $i <= $radiusCount);

如何设置当前半径(从半径列表中)以及如果结果来自

2 回复 | 直到 6 年前

u_mulder 6 年前

您可以用重写循环 foreach break 以下内容:

$radius = $_POST['radius'] ? $_POST['radius'] : 2;

foreach ($radiusList as $index => $radius_str) {
    // check that current index value is greater or equals `$radius`
    // it will skip values that are less than `$radius`
    if ($index >= $radius) {
        // find clinics
        $clinics = $this->clinicQuery($conditionsQuery, $lat, $lng, $index);
        // if clinics found - break the loop
        if (!empty($clinics)) {
            break;
        }
    }
}

mscho 6 年前

$clinics = [];
$radiusList = array_filter($radiusList, function($index) use ($radius) {
    return $index >= $radius;
}, ARRAY_FILTER_USE_KEY);
ksort($radiusList); // if you need to make sure the list is ordered
foreach ($radiusList as $distance => $distanceLabel) {
    $clinics = $this->clinicQuery($conditionsQuery, $lat, $lng, $radius);
    if (!empty($clinics)) {
        break;
    }
}