如果消息字段包含某些单词（PHP），如何阻止表单提交？

Question

如果消息字段包含某些词，我想阻止提交联系表。我用 one, two 和 three 作为例子：

//Prevent the form from submission if it contains one, two, or three
$needle = ['one', 'two', 'three'];
if (stripos($message, $needle) !== false) {
    echo "$message contains $needle";
}

这对我不起作用。然而，我只用一个词测试了它并且它起作用了：

if (stripos($message, 'one') !== false) {
    echo 'invalid message format';
}

如果上述数组不起作用，我如何检查 PHP 中消息中的多个单词？

Answer 1

你需要使用for循环。

$needle_arr = ['one', 'two', 'three'];
$included = [];

foreach($needle_arr as $needle)
  if (stripos($message, $needle) !== false) {
      $included []= $needle;
  }

if(count($included) > 0)
  echo "$message contains ".implode(", ", $included);

Answer 2

您需要遍历数组。

$word_found = false;
foreach ($needles as $word) {
    if (stripos($message, $word) !== false) {
        $word_found = $word;
        break;
    }
}
if ($word_found) {
    echo "$message contains $word_found";
}

如果消息字段包含某些单词（PHP），如何阻止表单提交？

How to block form submissions if the message field contains certain words (PHP)?

php

arrays

string

substring

contains