为什么这个PHP在执行时会使我的网站空白？ [重复]

Question

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• Reference - What does this error mean in PHP? 34 answers

A website I'm making has two fields, and when you press the submit button runs the following PHP. If both fields are empty, however, the page returns blank, almost as if it runs exit() at a certain point.

else if ($_POST["submit"] == "Update Bookmark") {
$url_to_update = $_POST["url_to_update"];

if (strpos($url_to_update, "http") === false) {
$url_to_update = "http://" . $url_to_update;
}

// Check if this URL is already in Pinboard
$api_url = "https://*username*:*password*@api.pinboard.in/v1/posts/get?url=" . $url_to_update . "&format=json";

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $api_url);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$json = curl_exec($ch);

curl_close($ch);

$values = json_decode($json);

// URL is already in Pinboard
  if (count($values["posts"]) > 0) {
$new_title = str_replace(" ", "%20", $_POST["new_title"]);
$api_url = "https://*username:password*@api.pinboard.in/v1/posts/add?url=" . $url_to_update . "&description=" . $new_title . "&format=json";

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $api_url);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$json = curl_exec($ch);

curl_close($ch);

$values = json_decode($json);

  if ($values->result_code == "done") {
echo "<div class='success-message'><strong>Updated!</strong> Your bookmark has been successfully updated to the new title.</div>";
}
  else {
echo "<div class='error-message'><strong>Dang!</strong> Something messed up.</div>";
  }
}
// URL is not already in Pinboard, so add it for the user
  else {
$new_title = str_replace(" ", "%20", $_POST["new_title"]);
$api_url = "https://*username:password*@api.pinboard.in/v1/posts/add?url=" . $url_to_update . "&description=" . $new_title . "&format=json";

$ch = curl_init();

curl_setopt($ch, CURLOPT_URL, $api_url);
curl_setopt($ch, CURLOPT_HEADER, FALSE);
curl_setopt($ch, CURLOPT_RETURNTRANSFER, 1);

$json = curl_exec($ch);

curl_close($ch);

$values = json_decode($json);

if ($values->result_code == "done") {
echo "<div class='success-message'><strong>Added instead!</strong> There wasn't a bookmark with this URL already, so we added it.</div>";
  }
else if ($values->result_code == "missing url") {
echo "<div class='error-message'><strong>Invalid URL!</strong> That's not a valid URL!</div>";
  }
else {
echo "<div class='error-message'><strong>Dang!</strong> Something messed up.</div>";
    }
  }
}

Could anyone offer some help? I've scanned it over and over again, but I cannot find what's causing it.

</div>

Answer 1

You probably turned off error reporting. Try putting this in your header:

<?php
ini_set('display_errors', 'On');
?>