PHP - 转换提交的文本区域

Question

我有像 È™ 这样的坏字符需要替换。我已经准备好 99% 的代码，但是我缺少一件事……我不知道如何从 textarea 转换内容，然后用好的字符替换它

更准确地说，下面的脚本用于显示文本，我需要用好的版本替换该文本

// define variables and set to empty values
$comment = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   if (empty($_POST["comment"])) {
     $comment = "";
   } else {
     $comment = test_input($_POST["comment"]);
   }
}

function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}

    <h2>PHP Form Validation Example</h2>
<p><span class="error">* required field.</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
   <textarea class="comment" id="comment" name="comment" rows="5" cols="40"><?php echo $comment;?></textarea>
   <br><br>
   <input type="submit" name="submit" value="Submit">
</form>


echo "<h2>Your Input:</h2>";


$ToReplace = array("ă", "î", "È›", "ÅŸ", "Å£", "È™", "â", "ÃŽ", "î", "Î", "â", "ÇŽ", "“", "”", "Ã", "�");
$Replacement   = array("a", "i", "t", "s", "t", "s", "a", "i", "i", "I", "a", "a", "'", "'", "a", "a");
$convert = str_replace($ToReplace, $Replacement, $comment);

echo $convert;

Answer 1

如果我确实理解了您的问题您的目标是替换 textarea 中的文本。如果是这种情况，只需在 textarea 中输出您的 $convert 变量即可。

正如你的例子，这是可行的：

// define variables and set to empty values
$comment = "";

if ($_SERVER["REQUEST_METHOD"] == "POST") {
   if (empty($_POST["comment"])) {
     $comment = "";
   } else {
     $comment = test_input($_POST["comment"]);
   }
}


$ToReplace = array("ă", "î", "È›", "ÅŸ", "Å£", "È™", "â", "ÃŽ", "î", "Î", "â", "ÇŽ", "“", "”", "Ã", "�");
$Replacement   = array("a", "i", "t", "s", "t", "s", "a", "i", "i", "I", "a", "a", "'", "'", "a", "a");
$convert = str_replace($ToReplace, $Replacement, $comment);



function test_input($data) {
   $data = trim($data);
   $data = stripslashes($data);
   $data = htmlspecialchars($data);
   return $data;
}

    <h2>PHP Form Validation Example</h2>
<p><span class="error">* required field.</span></p>
<form method="post" action="<?php echo htmlspecialchars($_SERVER["PHP_SELF"]);?>">
   <textarea class="comment" id="comment" name="comment" rows="5" cols="40"><?php echo $convert;?></textarea>
   <br><br>
   <input type="submit" name="submit" value="Submit">
</form>


echo "<h2>Your Input:</h2>";
echo $convert;