PHP - 检查/比较textfield中的输入

Question

Until now I had a PHP Kontaktform with empty textfields and checked the needed fields with:

$name = check_input($_POST['name'], "Please enter a Name.");

Now the lable "your name" is in it the textfield itself. So the value is not empty anymore. How do I check if there's still only "your name" in the field instead of a real name?

Thank you (sorry php-noob)

Answer 1

use the HTML5 placeholder tag in the first place.

<input placeholder="Your Name" value="" name="name">

or, if that is not possible, check for that given string:

$name = (strstr('your name', $_POST['name']) ? '' : check_input($_POST['name'], "Please enter a Name."));