Text field php writing method

In PHP, a textarea is a form control used to receive user input. In HTML, text areas are declared using the <textarea> tag.

To obtain the value of the text field during form processing, you need to use the $_POST or $_GET super global array, depending on the request method used when submitting the form. . The standard code to obtain the value of the text area is as follows:

$textarea_value = $_POST['textarea_name'];

Among them, textarea_name is the name attribute value of the text area, and $textarea_value is the text The value of the field, which is the text entered by the user.

The following is an example of a complete HTML form and PHP processing code:

<form action="process.php" method="post">
  <label for="message">请输入留言：</label>
  <textarea name="message" id="message"></textarea>
  <input type="submit" value="提交">
</form>

<?php
if ($_SERVER['REQUEST_METHOD'] === 'POST') {
  $message = $_POST['message'];
  echo "您输入的留言是： $message";
}
?>

In this example, we create a simple form that contains a text field and a submit button . The form's action attribute points to a PHP file named process.php, which is used to process form submission data. The form's method attribute is set to post, which means the form data will be submitted to the $_POST super in the process.php file in the global array.

In the process.php file, we use the if statement to check whether the requested method is post. If so, the text field The value of is stored in the $message variable. Next, we use echo to output this variable so that the user can see their entered message on the page.

In short, using text fields in PHP is similar to other form controls. You need to set the text area using the <textarea> tag in HTML and use the $_POST or $_GET superglobal variable to get the form submission data. If you implement appropriate validation and filtering in your form processing code (such as removing text containing malicious scripts), a text field can be a powerful form input control.

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