Question

我创建了一个页面，要求用户提供日期并输出api的结果。 api要求开始日期和结束日期相隔不超过7天。我已对其进行了设置，以便用户可以输入日期，结束日期将在7天后自动设置。

我在使用日期功能时遇到问题，现在看来代码会在用户输入他们的选择之前自动使用今天的日期。

我希望用户能够选择日期，无论是今天还是将来的日期，我希望我的api调用等待用户输入，但不知道如何做到这一点。

    <?php
    $startDate = date('Y-m-d', strtotime(isset($_GET['start'])? $_GET['start'] :date('Y-m-d')));
    $endDate = date('Y-m-d', strtotime('+7 days', strtotime($startDate)));

if($startDate){
    echo "$endDate";        

    $params = array(
    'start_date' => $startDate,
    'end_date' => $endDate,
    'api_key' => 'coXJeNygdeuxVKs9yJLecWbfuXsY54Wi9gq37HuN'
);


    $data = json_decode(callAPI('GET', 'https://api.nasa.gov/neo/rest/v1/feed', $params));

    echo "<h1>Near-Earth Object (NEO) Report between " . $params['start_date'] . " and " . $params['end_date'] . "</h1>";

   foreach ($data->near_earth_objects as $date => $count) {
    echo "<p>" . sizeof($count) . " objects detected on $date</p>";

    echo "<ol>";
    foreach ($data->near_earth_objects->$date as $near_earth_object) {
        echo "<li>" . $near_earth_object->name . " <a href='" . $near_earth_object->nasa_jpl_url . "'>" . $near_earth_object->nasa_jpl_url . "</a><br>";
        echo "Estimated Diameter: " . $near_earth_object->estimated_diameter->meters->estimated_diameter_min . "-" . $near_earth_object->estimated_diameter->meters->estimated_diameter_max . " metres<br>";

        echo "<ul>";
        foreach ($near_earth_object->close_approach_data as $close_approach) {
            echo "<li>Close approach on " . $close_approach->close_approach_date . " velocity " . $close_approach->relative_velocity->kilometers_per_hour . " km/h " . "missing " . $close_approach->orbiting_body . " by " . $close_approach->miss_distance->kilometers . " km</li> ";
        }
        echo "</ul></li>";
    }
    echo "</ol>";
    }

    }
    ?>

Answer 1

这几乎就是你想要的开始。只需要在if语句中添加else，并在没有输入日期时更新开始/结束日期以返回false。注意：我还将标题移到if上方并添加了第三个条件以显示日期（如果已经输入），以便始终显示日期。

<?php
$startDate = isset($_GET['start']) ? date('Y-m-d', strtotime($_GET['start'] )) : false;
$endDate = $startDate ? date('Y-m-d', strtotime('+7 days', strtotime($startDate))) : false;

$params = array(
    'start_date' => $startDate,
    'end_date' => $endDate,
    'api_key' => 'coXJeNygdeuxVKs9yJLecWbfuXsY54Wi9gq37HuN'
);

echo '<h1>Near-Earth Object (NEO) Report',
    ( $startDate ? ' between ' . $params['start_date'] . ' and ' . $params['end_date'] . '</h1>' : '</h1>');

if($startDate) {

    echo "$endDate";

    $data = json_decode(callAPI('GET', 'https://api.nasa.gov/neo/rest/v1/feed', $params));

    foreach ($data->near_earth_objects as $date => $count) {
        echo "<p>" . sizeof($count) . " objects detected on $date</p>";

        echo "<ol>";
        foreach ($data->near_earth_objects->$date as $near_earth_object) {
            echo "<li>" . $near_earth_object->name . " <a href='" . $near_earth_object->nasa_jpl_url . "'>" . $near_earth_object->nasa_jpl_url . "</a><br>";
            echo "Estimated Diameter: " . $near_earth_object->estimated_diameter->meters->estimated_diameter_min . "-" . $near_earth_object->estimated_diameter->meters->estimated_diameter_max . " metres<br>";

            echo "<ul>";
            foreach ($near_earth_object->close_approach_data as $close_approach) {
                echo "<li>Close approach on " . $close_approach->close_approach_date . " velocity " . $close_approach->relative_velocity->kilometers_per_hour . " km/h " . "missing " . $close_approach->orbiting_body . " by " . $close_approach->miss_distance->kilometers . " km</li> ";
            }
            echo "</ul></li>";
        }
        echo "</ol>";
    }

} else {

    ?><form action="" method="GET">
        <label for="startdate">Please enter a start date (end date will be 7 days after the start date):</label>
        <input id="startdate" type="date" name="start" />
        <input type="submit" />
    </form><?php

}

在api中使用日期变量

1 个答案: